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Kubala AG, Roma PG, Jameson JT, Sessoms PH, Chinoy ED, Rosado LR, Viboch TB, Schrom BJ, Rizeq HN, Gordy PS, Hirsch LDA, Biggs LAT, Russell DW, Markwald RR. Advancing a U.S. navy shipboard infrastructure for sleep monitoring with wearable technology. Appl Ergon 2024; 117:104225. [PMID: 38219375 DOI: 10.1016/j.apergo.2024.104225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 12/20/2023] [Accepted: 01/03/2024] [Indexed: 01/16/2024]
Abstract
Development of fatigue management solutions is critical to U.S. Navy populations. This study explored the operational feasibility and acceptability of commercial wearable devices (Oura Ring and ReadiBand) in a warship environment with 845 Sailors across five ship cohorts during at-sea operations ranging from 10 to 31 days. Participants were required to wear both devices and check-in daily with research staff. Both devices functioned as designed in the environment and reliably collected sleep-wake data. Over 10,000 person-days at-sea, overall prevalence of Oura and ReadiBand use was 69% and 71%, respectively. Individual use rates were 71 ± 38% of days underway for Oura and 59 ± 34% for ReadiBand. Analysis of individual factors showed increasing device use and less device interference with age, and more men than women found the devices comfortable. This study provides initial support that commercial wearables can contribute to infrastructures for operational fatigue management in naval environments.
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Affiliation(s)
- Andrew G Kubala
- Warfighter Performance Department, Operational Readiness and Health Directorate, Naval Health Research Center, San Diego, CA, USA; Military and Veterans Health Solutions, Leidos Inc., San Diego, CA, USA
| | - Peter G Roma
- Warfighter Performance Department, Operational Readiness and Health Directorate, Naval Health Research Center, San Diego, CA, USA; Military and Veterans Health Solutions, Leidos Inc., San Diego, CA, USA
| | - Jason T Jameson
- Warfighter Performance Department, Operational Readiness and Health Directorate, Naval Health Research Center, San Diego, CA, USA; Military and Veterans Health Solutions, Leidos Inc., San Diego, CA, USA
| | - Pinata H Sessoms
- Warfighter Performance Department, Operational Readiness and Health Directorate, Naval Health Research Center, San Diego, CA, USA
| | - Evan D Chinoy
- Warfighter Performance Department, Operational Readiness and Health Directorate, Naval Health Research Center, San Diego, CA, USA
| | - Luis R Rosado
- Warfighter Performance Department, Operational Readiness and Health Directorate, Naval Health Research Center, San Diego, CA, USA; Military and Veterans Health Solutions, Leidos Inc., San Diego, CA, USA
| | - Trevor B Viboch
- Warfighter Performance Department, Operational Readiness and Health Directorate, Naval Health Research Center, San Diego, CA, USA; Military and Veterans Health Solutions, Leidos Inc., San Diego, CA, USA
| | - Brandon J Schrom
- Warfighter Performance Department, Operational Readiness and Health Directorate, Naval Health Research Center, San Diego, CA, USA; Military and Veterans Health Solutions, Leidos Inc., San Diego, CA, USA
| | - Hedaya N Rizeq
- Warfighter Performance Department, Operational Readiness and Health Directorate, Naval Health Research Center, San Diego, CA, USA; Military and Veterans Health Solutions, Leidos Inc., San Diego, CA, USA
| | - Prayag S Gordy
- Warfighter Performance Department, Operational Readiness and Health Directorate, Naval Health Research Center, San Diego, CA, USA; Military and Veterans Health Solutions, Leidos Inc., San Diego, CA, USA
| | | | - Lcdr Adam T Biggs
- Psychological Health and Resilience Department, Military Population Health Directorate, Naval Health Research Center, San Diego, CA, USA
| | - Dale W Russell
- Commander Naval Surface Force, U.S. Pacific Fleet, San Diego, CA, USA; Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Rachel R Markwald
- Warfighter Performance Department, Operational Readiness and Health Directorate, Naval Health Research Center, San Diego, CA, USA.
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Roma PG, Blackwell Landon L, Spencer CA, Whitmire AM, Williams TJ. The Subjective Habitability & Acceptability Questionnaire (SHAQ): Development and Validation. Hum Factors 2023; 65:1074-1104. [PMID: 35094601 DOI: 10.1177/00187208211053462] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE Describe the development and validation of the Subjective Habitability & Acceptability Questionnaire (SHAQ). BACKGROUND Habitat area size, layout, and design may impact individual and team behavioral health and performance (BHP) outcomes in operational environments. However, there are no standardized measures of these relationships. METHOD SHAQ is a modular survey consisting of two 6-item scales: BHP Outcomes (Performance of Individual Activities, Performance of Group Activities, Mood, Psychological Stress, Sleep, and Social Interactions) and Habitability Moderators (Privacy, Social Density, Efficiency, Control, Comfort, and Convenience). We collected SHAQ data from NASA's Human Exploration Research Analog (HERA) crews (n = 19) in reference to multiple habitat areas (Sleep/Bedroom, Hygiene/Bathroom, Work/Office/Workshop, and Food Preparation/Kitchen/Galley) in the HERA operational environment, private hotel rooms, and individual home habitats. RESULTS SHAQ has high construct validity (single factor solutions, mean item factor loading = 0.760, mean % variance = 60.37), internal consistency and reliability (item mean α = 0.880, mean ω=0.894, mean ICC = 0.430), concurrent validity (mean item r with System Usability Scale = 0.42), and discriminant validity (e.g., significantly higher facilitation of group activities in HERA Work/Office/Workshop and Food Preparation/Kitchen/Galley areas vs. Hygiene/Bathroom and Sleep/Bedroom areas; significantly higher ratings of privacy, comfort, and convenience in hotel vs. HERA). CONCLUSION SHAQ is a reliable, valid, and sensitive measure of BHP impacts of habitat size and layout. APPLICATION SHAQ can be used to inform evidence-based recommendations and thresholds for habitat area size, layout, and design options to support individual and team BHP in operational environments.
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Affiliation(s)
- Peter G Roma
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, USA
| | - Lauren Blackwell Landon
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, USA
| | - Cara A Spencer
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, USA
| | - Alexandra M Whitmire
- Human Factors and Behavioral Performance Element, Human Research Program, NASA Johnson Space Center, Houston, TX, USA
| | - Thomas J Williams
- Human Factors and Behavioral Performance Element, Human Research Program, NASA Johnson Space Center, Houston, TX, USA
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Schwartz LP, Toegel F, Devine JK, Holtyn AF, Roma PG, Hursh SR. Latent factor structure of behavioral economic heroin and cocaine demand curves. Exp Clin Psychopharmacol 2023; 31:378-385. [PMID: 36074626 DOI: 10.1037/pha0000594] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Research has shown that behavioral economic demand curve indices can be characterized by a two-factor latent structure and that these factors can predict dimensions of substance use. No study to date has examined the latent factor structure of heroin and cocaine demand curves. The objective of this study was to use exploratory factor analysis to examine the underlying factor structure of the facets of heroin and cocaine reinforcement derived from heroin and cocaine demand curves. Participants were 143 patients from two samples that met the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5; American Psychiatric Association [APA], 2013) criteria for opioid dependance and were undergoing medication-assisted treatment (methadone or buprenorphine). Heroin and cocaine demand curves were generated via hypothetical purchase tasks (HPT) that assessed consumption at 9 or 17 levels of prices from $0 to $500. Five facets of demand were generated from the tasks (Q0, 1/α, Pmax, Omax, and break point). Principal components analysis was used to examine the latent structure among the variables. The results revealed a two-factor solution for both heroin and cocaine demand. These factors were interpreted as persistence, consisting of 1/α, Pmax, Omax, and break point, and amplitude, consisting of Q₀ and Omax, and in one case, 1/α. Heroin factors had some predictive power for future substance use, but cocaine factors did not. These findings suggest that heroin and cocaine demand indices can be reduced to two factors indicating sensitivity and volume of consumption, and that these factors may be able to predict substance use for heroin. (PsycInfo Database Record (c) 2023 APA, all rights reserved).
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Affiliation(s)
| | | | | | | | - Peter G Roma
- Department of Psychiatry and Behavioral Sciences
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Sekel NM, Beckner ME, Conkright WR, LaGoy AD, Proessl F, Lovalekar M, Martin BJ, Jabloner LR, Beck AL, Eagle SR, Dretsch M, Roma PG, Ferrarelli F, Germain A, Flanagan SD, Connaboy C, Haufler AJ, Nindl BC. Military tactical adaptive decision making during simulated military operational stress is influenced by personality, resilience, aerobic fitness, and neurocognitive function. Front Psychol 2023; 14:1102425. [PMID: 36844343 PMCID: PMC9944034 DOI: 10.3389/fpsyg.2023.1102425] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 01/09/2023] [Indexed: 02/11/2023] Open
Abstract
Laboratory-based studies designed to mimic combat or military field training have consistently demonstrated deleterious effects on warfighter's physical, cognitive, and emotional performance during simulated military operational stress (SMOS). Purpose The present investigation sought to determine the impact of a 48-h simulated military operational stress (SMOS) on military tactical adaptive decision making, and the influence of select psychological, physical performance, cognitive, and physiological outcome measures on decision making performance. Methods Male (n = 48, 26.2 ± 5.5 years, 177.7 ± 6.6 cm, 84.7 ± 14.1 kg.) subjects currently serving in the U.S. military were eligible to participate in this study. Eligible subjects completed a 96-h protocol that occurred over five consecutive days and four nights. Day 2 (D2) and day 3 (D3) consisted of 48-h of SMOS wherein sleep opportunity and caloric needs were reduced to 50%. Differences in SPEAR total block score from baseline to peak stress (D3 minus D1) were calculated to assess change in military tactical adaptive decision making and groups were stratified based on increase (high adaptors) or decrease (low adaptors) of the SPEAR change score. Results Overall, military tactical decision-making declined 1.7% from D1 to D3 (p < 0.001). High adaptors reported significantly higher scores of aerobic capacity (p < 0.001), self-report resilience (p = 0.020), extroversion (p < 0.001), and conscientiousness (p < 0.001). at baseline compared to low adaptors, while low adaptors reported greater scores in Neuroticism (p < 0.001). Conclusion The present findings suggest that service members whose adaptive decision making abilities improved throughout SMOS (i.e., high adaptors) demonstrated better baseline psychological/self-reported resilience and aerobic capacity. Further, changes in adaptive decision-making were distinct from those of lower order cognitive functions throughout SMOS exposure. With the transition of future military conflicts placing higher priority on enhancing and sustaining cognitive readiness and resiliency, data presented here demonstrates the importance of measuring and categorizing baseline measures inherent to military personnel, in order to change and train one's ability to suffer less of a decline during high stress conditions.
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Affiliation(s)
- Nicole M. Sekel
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States,*Correspondence: Nicole M. Sekel, ✉
| | - Meaghan E. Beckner
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States
| | - William R. Conkright
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States
| | - Alice D. LaGoy
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States,Military Sleep Tactics and Resilience Research Team, Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Felix Proessl
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States
| | - Mita Lovalekar
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States
| | - Brian J. Martin
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States
| | - Leslie R. Jabloner
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States
| | - Alaska L. Beck
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States
| | - Shawn R. Eagle
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States
| | - Michael Dretsch
- U.S. Army Medical Research Directorate-West, Walter Reed Army Institute of Research, Joint Base Lewis-McChord, Washington, WA, United States
| | - Peter G. Roma
- Behavioral Health and Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, United States,Warfighter Performance Department, Operational Readiness and Health Directorate, Leidos/Naval Health Research Center, San Diego, CA, United States
| | - Fabio Ferrarelli
- Military Sleep Tactics and Resilience Research Team, Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Anne Germain
- Military Sleep Tactics and Resilience Research Team, Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Shawn D. Flanagan
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States
| | - Christopher Connaboy
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States
| | - Amy J. Haufler
- Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States
| | - Bradley C. Nindl
- Neuromuscular Research Laboratory, Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, PA, United States
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LaGoy AD, Conkright WR, Proessl F, Sinnott AM, Beckner ME, Jabloner L, Eagle SR, Sekel NM, Roma PG, Dretsch MN, Flanagan SD, Mi Q, Nindl BC, Germain A, Connaboy C, Ferrarelli F. Less daytime sleepiness and slow wave activity during sleep predict better physical readiness in military personnel. Sleep Health 2023; 9:93-99. [PMID: 36503874 DOI: 10.1016/j.sleh.2022.10.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 10/13/2022] [Accepted: 10/30/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND Military personnel must maintain physical performance despite exposure to operational stressors such as sleep loss, caloric restriction and high cognitive load. Habitual sleep and specific sleep features are positively associated with fitness and may contribute to physical performance in operational settings. Further, by affecting muscle recovery, sleep may contribute to the ability to maintain performance across multiple days of exposure to operational stressors. OBJECTIVES We examined the role of individual differences in baseline sleep on baseline physical performance and on change in physical performance throughout exposure to simulated military operational stress (SMOS). METHODS Military personnel (36 male, 9 female, 26.3 ± 5.3 years) completed a 5-day SMOS protocol during which they completed a tactical mobility test daily. Sleep questionnaires were administered at intake and sleep was monitored each night with polysomnography. Lasso regressions were used to identify meaningful predictors of physical performance at baseline and of change in physical performance across SMOS. RESULTS Better aerobic fitness, lower daytime sleepiness (Epworth Sleepiness Scale), and lower absolute slow wave activity (0.5-4 Hz) predicted better physical performance at baseline (66.1% of variance explained), but did not relate to changes in performance. CONCLUSIONS Collectively, higher daytime sleepiness and slow wave activity may reflect more chronic exposure to insufficient sleep and higher baseline sleep drive, which in turn led to compromised physical performance. The findings suggest that low self-report sleepiness and low objective slow wave activity may reflect two quantifiable markers of healthy sleep behaviors that have implications for operational performance.
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Affiliation(s)
- Alice D LaGoy
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA; Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - William R Conkright
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Felix Proessl
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Aaron M Sinnott
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Meaghan E Beckner
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Leslie Jabloner
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Shawn R Eagle
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Nicole M Sekel
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Peter G Roma
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, NASA Johnson Space Center/KBR, Houston, Texas, USA
| | - Michael N Dretsch
- U.S. Army Medical Research Directorate-West, Walter Reed Army Institute of Research, Joint Base Lewis-McChord, Washington, USA
| | - Shawn D Flanagan
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Qi Mi
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Bradley C Nindl
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Anne Germain
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Christopher Connaboy
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Fabio Ferrarelli
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
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Jameson JT, Markwald RR, Kubala AG, Roma PG, Biggs AT, Lai K, Russell DW. Sleep deficiency, operational fatigue and the interplay of compromising factors: Analysis to aid in fatigue management. J Sleep Res 2022; 32:e13788. [PMID: 36436505 DOI: 10.1111/jsr.13788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/25/2022] [Accepted: 11/03/2022] [Indexed: 11/29/2022]
Abstract
The United States Navy is a high-reliability organization that must maintain optimum performance under challenging conditions. One key challenge for sailors is obtaining sufficient sleep, which can lead to fatigue and other outcomes that compromise operational readiness. Identifying sleep issues and their causes is critical for military leaders to care for their personnel, and to make informed, risk-based operational decisions. Though previous studies in shipboard environments have implicated factors responsible for insufficient sleep (e.g. poor sleep environment and work demands), there has been less research into characterizing the complex interplay among such factors in relation to sleep and work-related fatigue outcomes. This study seeks to address this gap. Data were drawn from the Afloat Safety Climate Assessment Survey of 7617 sailors from 73 ships. The survey included demographic characteristics and measures of crew endurance (e.g. sleep, occupational impairment due to fatigue). Descriptive analyses characterized the presence and severity of sleep issues across subpopulations and operational settings (e.g. the type of ship); structural equation modelling techniques characterized and quantified the statistical associations among factors. The results indicate that sleep deficits are widespread, holding across subpopulations and operational settings. Though sleep deficits varied across subpopulations, no group obtained an average of more than 7 hr of sleep per night. Fatigue-induced occupational functional impairment was directly related to sleep deficiency, and sleep environment and job-related factors were contributors to sleep deficiency. Moreover, job-related factors emerged as potentially more consequential. Lastly, factors may exist aboard a ship that could help promote better sleep.
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Affiliation(s)
- Jason T Jameson
- Leidos, Inc., San Diego, California, USA.,Sleep, Tactical Effectiveness, and Endurance Laboratory, Warfighter Performance Department, Naval Health Research Center, San Diego, California, USA
| | - Rachel R Markwald
- Sleep, Tactical Effectiveness, and Endurance Laboratory, Warfighter Performance Department, Naval Health Research Center, San Diego, California, USA
| | - Andrew G Kubala
- Leidos, Inc., San Diego, California, USA.,Sleep, Tactical Effectiveness, and Endurance Laboratory, Warfighter Performance Department, Naval Health Research Center, San Diego, California, USA
| | - Peter G Roma
- Leidos, Inc., San Diego, California, USA.,Sleep, Tactical Effectiveness, and Endurance Laboratory, Warfighter Performance Department, Naval Health Research Center, San Diego, California, USA
| | - Adam T Biggs
- Commander, Naval Surface Force, US Pacific Fleet, Coronado, California, USA
| | - Kevin Lai
- Leidos, Inc., San Diego, California, USA.,Commander, Naval Surface Force, US Pacific Fleet, Coronado, California, USA
| | - Dale W Russell
- Commander, Naval Surface Force, US Pacific Fleet, Coronado, California, USA.,Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
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Beckner ME, Conkright WR, Eagle SR, Martin BJ, Sinnott AM, LaGoy AD, Proessl F, Lovalekar M, Jabloner L, Roma PG, Basner M, Ferrarelli F, Germain A, Flanagan SD, Connaboy C, Nindl BC. Impact Of Simulated Operational Stress On Cognition Relative To Resilience, Fitness, Vigilance, And Neuroendocrine Biomarkers. Med Sci Sports Exerc 2021. [DOI: 10.1249/01.mss.0000763368.65135.e0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Roma PG, Schneiderman JS, Schorn JM, Whiting SE, Landon LB, Williams TJ. Assessment of Spaceflight Medical Conditions' and Treatments' Potential Impacts on Behavioral Health and Performance. Life Sci Space Res (Amst) 2021; 30:72-81. [PMID: 34281667 DOI: 10.1016/j.lssr.2021.05.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 05/24/2021] [Accepted: 05/26/2021] [Indexed: 06/13/2023]
Abstract
Long-duration space exploration missions will pose significant risks to the physical and behavioral health and performance of the crew. We documented the presence and frequency of (1) behavioral health and performance (BHP)-relevant symptoms for each condition in NASA's Exploration Medical Conditions List (EMCL), (2) the BHP-relevant effects of applicable medical treatments in the current International Space Station (ISS) On-Orbit Medication List, (3) the breadth of potential BHP impacts of spaceflight medical treatments, and (4) the likelihood of adverse BHP effects of treating spaceflight medical conditions. BHP symptoms and effects were categorized by the six neurobehavioral domains of the National Institute of Mental Health's Research Domain Criteria (RDoC) framework. Including the cognitive effects of acute and chronic pain (e.g., attention, memory), 94% of spaceflight medical conditions include symptoms relevant to Cognitive Systems (e.g., attention deficits, confusion, psychosis), 36% include symptoms relevant to Negative Valence Systems (e.g., anxiety), 32% include symptoms relevant to Arousal and Regulatory Systems (e.g., sleep disturbances), 22% include symptoms relevant to Sensorimotor Systems (e.g., dizziness), 19% include symptoms relevant to Positive Valence Systems (e.g., mania), and 11% include symptoms relevant to Social Processes (e.g., social withdrawal). Only 2% of spaceflight medical conditions have no documented BHP symptoms. Of the spaceflight medical treatments, 63% affect Arousal and Regulatory Systems, 60% affect Sensorimotor Systems, 59% affect Cognitive Systems, 53% affect Negative Valence Systems, 38% affect Positive Valence Systems, and 31% affect Social Processes. The breadth of potential BHP impacts was bimodal, in that 27% of spaceflight medical treatments had no documented BHP effects; however, 27% of treatments may produce adverse effects across all six neurobehavioral domains. Historical prevalence data on medical conditions, symptoms, and complaints from 14 years of International Space Station operations coupled with documented BHP effects of recommended treatments indicates the potential for up to 481 adverse BHP effects of spaceflight medical treatments per person-year. Assessing the potential BHP impacts of spaceflight medical conditions and their treatments highlights the interactive nature of operational risks, and can provide an enhanced evidence base to support integrated research and countermeasure development strategies for long-duration exploration missions.
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Affiliation(s)
- Peter G Roma
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, USA.
| | - Jason S Schneiderman
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, USA; Department of Psychiatry and Behavioral Health, Stony Brook University, Stony Brook, NY, USA
| | - Julia M Schorn
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, USA; Department of Psychology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Sara E Whiting
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, USA
| | - Lauren Blackwell Landon
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, USA
| | - Thomas J Williams
- Human Factors and Behavioral Performance Element, Human Research Program, NASA Johnson Space Center, Houston, TX, USA
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Beckner ME, Conkright WR, Eagle SR, Martin BJ, Sinnott AM, LaGoy AD, Proessl F, Lovalekar M, Jabloner LR, Roma PG, Basner M, Ferrarelli F, Germain A, Flanagan SD, Connaboy C, Nindl BC. Impact of simulated military operational stress on executive function relative to trait resilience, aerobic fitness, and neuroendocrine biomarkers. Physiol Behav 2021; 236:113413. [PMID: 33811909 DOI: 10.1016/j.physbeh.2021.113413] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/11/2021] [Accepted: 03/29/2021] [Indexed: 01/06/2023]
Abstract
PURPOSE To study the impact of 48 h of simulated military operational stress (SMOS) on executive function, in addition to the role of trait resilience (RES) and aerobic fitness (FIT) on executive function performance. Associations between executive function and neuropeptide-Y (NPY), brain-derived neurotropic factor (BDNF), insulin-like growth factor-I (IGF-I), oxytocin, and α-klotho (klotho) were assessed to elucidate potential biomarkers that may contribute to cognitive performance during a multi-factorial stress scenario. METHODS Fifty-four service members (SM) (26.4 ± 5.4 years, 178.0 ± 6.5 cm, 85.2 ± 14.0 kg) completed the 5-day protocol, including daily physical exertion and 48 h of restricted sleep and caloric intake. Each morning subjects completed a fasted blood draw followed by Cognition, a 10-part cognitive test battery assessing executive function. SMs were grouped into tertiles [low (L-), moderate (M-), high (H-)] based on Connor Davidson Resilience Score (RES) and V˙O2peak (FIT). Repeated measures ANOVA were run to analyze the effect of day on cognitive performance and biomarker concentration. Separate two-way mixed ANOVAs were run to determine the interaction of group by day on cognitive function. Friedman test with Bonferroni-corrected pairwise comparisons were used if assumptions for ANOVA were not met. Associations between changes in biomarkers and cognitive performance were analyzed using parametric and non-parametric correlation coefficients. RESULTS SMOS reduced SM vigilance -11.3% (p < 0.001) and working memory -5.6% (p = 0.015), and increased risk propensity +9.5% (p = 0.005). H-RES and H-FIT SMs demonstrated stable vigilance across SMOS (p > 0.05). Vigilance was compromised during SMOS in L- and M-RES (p = 0.007 and p = 0.001, respectively) as well as L- and M-FIT (p = 0.001 and p = 0.031, respectively). SMOS reduced circulating concentrations of α-klotho -7.2% (p = 0.004), NPY -6.4% (p = 0.001), and IGF-I -8.1% (p < 0.001) from baseline through the end of the protocol. BDNF declined -19.2% after the onset of sleep and caloric restriction (p = 0.005) with subsequent recovery within 48 h. Oxytocin remained stable (p > 0.05). Several modest associations between neuroendocrine biomarkers and cognitive performance were identified. CONCLUSION This study demonstrates H-FIT and H-RES may buffer the impact of SMOS on vigilance. SMOS negatively impacted circulating neuroendocrine biomarkers. While BDNF returned to baseline concentrations by the end of the 5 d protocol, NPY, IGF-I, and α-klotho may require a longer recovery period. These data suggest that the military may benefit by training and/or selection processes targeting at augmenting trait resilience and aerobic fitness for increased readiness.
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Affiliation(s)
- Meaghan E Beckner
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA.
| | - William R Conkright
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA
| | - Shawn R Eagle
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA
| | - Brian J Martin
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA
| | - Aaron M Sinnott
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA
| | - Alice D LaGoy
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA; Military Sleep Tactics and Resilience Research Team, Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Felix Proessl
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA
| | - Mita Lovalekar
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA
| | - Leslie R Jabloner
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA
| | - Peter G Roma
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, KBR/NASA Johnson Space Center, Houston, TX, USA
| | - Mathias Basner
- Division of Sleep and Chronobiology, Department of Psychiatry, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Fabio Ferrarelli
- Military Sleep Tactics and Resilience Research Team, Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Anne Germain
- Military Sleep Tactics and Resilience Research Team, Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Shawn D Flanagan
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA
| | - Christopher Connaboy
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA
| | - Bradley C Nindl
- Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA
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Smith MG, Wusk GC, Nasrini J, Baskin P, Dinges DF, Roma PG, Basner M. Effects of six weeks of chronic sleep restriction with weekend recovery on cognitive performance and wellbeing in high-performing adults. Sleep 2021; 44:6149527. [PMID: 33630069 DOI: 10.1093/sleep/zsab051] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 01/16/2021] [Indexed: 11/13/2022] Open
Abstract
Chronic sleep loss is associated with escalating declines in vigilant attention across days of sleep restriction. However, studies exceeding two weeks of chronic sleep loss are scarce, and the cognitive performance outcomes assessed are limited. We assessed the effects of six weeks of chronic sleep restriction on a range of cognitive domains in 15 high-performing individuals (38.5±8.2 years, 6 women) confined to small space in groups of four. Sleep opportunities were limited to 5h on weekdays and 8h on weekends. Individual sleep/wake patterns were recorded with actigraphy. Neurobehavioral performance was assessed in evenings with Cognition, a computerized battery of ten tests assessing a range of cognitive domains. There were some small to moderate effects of increasing sleep debt relative to pre-mission baseline, with decreases in accuracy across cognitive domains (standardized β=0.121, p=0.001), specifically on tests of spatial orientation (β=0.289, p=0.011) and vigilant attention (β=0.688, p<0.001), which were not restored by two nights of weekend recovery sleep. Cognitive and subjective decrements occurred despite occasional daytime napping in breach of study protocol, evening testing around the circadian peak, and access to caffeine before 14:00. Sensorimotor speed, spatial learning and memory, working memory, abstraction and mental flexibility, emotion identification, abstract reasoning, cognitive throughput and risk decision making were not significantly affected by sleep debt. Taken together with modest lower subjective ratings of happiness and healthiness, these findings underline the importance of sufficient sleep, on both an acute and chronic basis, for performance in selected cognitive domains and subjective wellbeing in operationally-relevant environments.
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Affiliation(s)
- M G Smith
- Unit for Experimental Psychiatry, Division of Sleep and Chronobiology, Department of Psychiatry, University of Pennsylvania Perelman School of Medicine
| | - G C Wusk
- School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University.,Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center
| | - J Nasrini
- Unit for Experimental Psychiatry, Division of Sleep and Chronobiology, Department of Psychiatry, University of Pennsylvania Perelman School of Medicine
| | - P Baskin
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center
| | - D F Dinges
- Unit for Experimental Psychiatry, Division of Sleep and Chronobiology, Department of Psychiatry, University of Pennsylvania Perelman School of Medicine
| | - P G Roma
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center
| | - M Basner
- Unit for Experimental Psychiatry, Division of Sleep and Chronobiology, Department of Psychiatry, University of Pennsylvania Perelman School of Medicine
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Beckner ME, Martin BJ, Conkright WR, Eagle SR, Sinnott AM, LaGoy AD, Prossel F, Flanagan SD, Germain A, Roma PG, Dretsch MN, Connaboy C, Nindl BC. Simulated Military Operational Stress Negatively Impacts Psychomotor Vigilance And Neurocognitive Biomarkers In Men And Women. Med Sci Sports Exerc 2020. [DOI: 10.1249/01.mss.0000676928.67602.f7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Banks S, Landon LB, Dorrian J, Waggoner LB, Centofanti SA, Roma PG, Van Dongen HP. Effects of fatigue on teams and their role in 24/7 operations. Sleep Med Rev 2019; 48:101216. [DOI: 10.1016/j.smrv.2019.101216] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 07/22/2019] [Accepted: 09/09/2019] [Indexed: 12/17/2022]
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13
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Landon LB, Douglas GL, Downs ME, Greene MR, Whitmire AM, Zwart SR, Roma PG. The Behavioral Biology of Teams: Multidisciplinary Contributions to Social Dynamics in Isolated, Confined, and Extreme Environments. Front Psychol 2019; 10:2571. [PMID: 31824374 PMCID: PMC6883946 DOI: 10.3389/fpsyg.2019.02571] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 10/30/2019] [Indexed: 12/26/2022] Open
Abstract
Teams in isolated, confined, and extreme (ICE) environments face many risks to behavioral health, social dynamics, and team performance. Complex long-duration ICE operational settings such as spaceflight and military deployments are largely closed systems with tightly coupled components, often operating as autonomous microsocieties within isolated ecosystems. As such, all components of the system are presumed to interact and can positively or negatively influence team dynamics through direct or indirect pathways. However, modern team science frameworks rarely consider inputs to the team system from outside the social and behavioral sciences and rarely incorporate biological factors despite the brain and associated neurobiological systems as the nexus of input from the environment and necessary substrate for emergent team dynamics and performance. Here, we provide a high-level overview of several key neurobiological systems relevant to social dynamics. We then describe several key components of ICE systems that can interact with and on neurobiological systems as individual-level inputs influencing social dynamics over the team life cycle-specifically food and nutrition, exercise and physical activity, sleep/wake/work rhythms, and habitat design and layout. Finally, we identify opportunities and strategic considerations for multidisciplinary research and development. Our overarching goal is to encourage multidisciplinary expansion of team science through (1) prospective horizontal integration of variables outside the current bounds of team science as significant inputs to closed ICE team systems and (2) bidirectional vertical integration of biology as the necessary inputs and mediators of individual and team behavioral health and performance. Prospective efforts to account for the behavioral biology of teams in ICE settings through an integrated organizational neuroscience approach will enable the field of team science to better understand and support teams who work, live, serve, and explore in extreme environments.
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Affiliation(s)
- Lauren Blackwell Landon
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, United States
| | - Grace L. Douglas
- Advanced Food Technology, Human Systems Engineering and Development Division, Human Health and Performance Directorate, NASA Johnson Space Center, Houston, TX, United States
| | - Meghan E. Downs
- Human Physiology, Performance, Protection, and Operations Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, United States
| | - Maya R. Greene
- Usability Testing and Analysis Facility, Human Systems Engineering and Development Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, United States
| | - Alexandra M. Whitmire
- Human Factors and Behavioral Performance Element, Human Research Program, NASA Johnson Space Center, Houston, TX, United States
| | - Sara R. Zwart
- Nutritional Biochemistry Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, University of Texas Medical Branch/NASA Johnson Space Center, Houston, TX, United States
| | - Peter G. Roma
- Behavioral Health & Performance Laboratory, Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, KBR/NASA Johnson Space Center, Houston, TX, United States
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14
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Schwartz LP, Roma PG, Henningfield JE, Hursh SR, Cone EJ, Buchhalter AR, Fant RV, Schnoll SH. Behavioral economic demand metrics for abuse deterrent and abuse potential quantification. Drug Alcohol Depend 2019; 198:13-20. [PMID: 30861390 DOI: 10.1016/j.drugalcdep.2019.01.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 12/14/2018] [Accepted: 01/27/2019] [Indexed: 12/29/2022]
Abstract
INTRODUCTION Behavioral economics provides a framework for quantifying drug abuse potential that can inform public health risk, clinical treatment, and research. Hypothetical purchase task (HPT) questionnaires may provide a low-cost and sensitive method by which to measure and predict the appeal of pharmaceutical drugs that differ by formulation. However, the validity of this type of analysis must be empirically established by comparing the "essential value" (EV) of different drugs across subgroups. PROCEDURES This pilot study used HPT assessments and the Exponential Model of Demand to quantify the EV of opioid medications-specifically, easily tampered formulations versus (vs.) abuse-deterrent formulations-in patients with a history of opioid abuse. MAIN FINDINGS Participants had more inelastic demand for opioid pills than for cigarettes and alcohol. Participants with experience manipulating pills (M group) had more inelastic demand for standard pills vs. participants with no manipulation experience (NM group), and the M group had a more elastic demand for the abuse-deterrent opioid pill than for the standard pill. There was no effect of formulation in the NM group and there was no difference in demand elasticity for abuse-deterrent pills between the two groups. There was a positive correlation between the EVs of different drugs, and between some behavioral economic indices and treatment variables. CONCLUSIONS Our results suggest that HPTs may provide a sensitive measure of abuse potential that can distinguish between different formulations in at-risk populations.
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Affiliation(s)
- Lindsay P Schwartz
- Institutes for Behavior Resources, 2104 Maryland Ave, Baltimore, MD, 21218, USA.
| | - Peter G Roma
- Behavioral Health and Performance Laboratory, Biomedical Research and Environmental Sciences Division, KBRwyle/NASA Johnson Space Center, Houston, TX, USA; Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, 1800 Orleans St., Baltimore, MD, 21287, USA
| | - Jack E Henningfield
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, 1800 Orleans St., Baltimore, MD, 21287, USA; Pinney Associates, 4800 Montgomery Ln #400, Bethesda, MD, 20814, USA
| | - Steven R Hursh
- Institutes for Behavior Resources, 2104 Maryland Ave, Baltimore, MD, 21218, USA; Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, 1800 Orleans St., Baltimore, MD, 21287, USA
| | - Edward J Cone
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, 1800 Orleans St., Baltimore, MD, 21287, USA; Pinney Associates, 4800 Montgomery Ln #400, Bethesda, MD, 20814, USA
| | | | - Reginald V Fant
- Pinney Associates, 4800 Montgomery Ln #400, Bethesda, MD, 20814, USA
| | - Sidney H Schnoll
- Pinney Associates, 4800 Montgomery Ln #400, Bethesda, MD, 20814, USA
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15
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Townsend EA, Platt DM, Rowlett JK, Roma PG, Freeman KB. Reinforcing effectiveness of midazolam, ethanol, and sucrose: behavioral economic comparison of a mixture relative to its component solutions. Behav Pharmacol 2017; 28:386-393. [PMID: 28537943 PMCID: PMC5648065 DOI: 10.1097/fbp.0000000000000308] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Benzodiazepines (BZs) are relatively safe when administered alone. However, these drugs can produce severe side effects when coadministered with ethanol. Despite these adverse consequences, rates of concurrent BZ and ethanol misuse are increasing, and it is unclear whether this behavior is maintained by an enhanced reinforcing effect of the mixture. To address this issue, the current study compared the reinforcing effectiveness of sucrose solutions mixed with midazolam, ethanol, or both. Eight male rats were trained to orally self-administer solutions of either sucrose (S), sucrose+midazolam (SM), sucrose+ethanol (SE), or sucrose+midazolam+ethanol (SME). The response requirement was increased between sessions until the number of reinforcers earned was zero and the relationship between response requirement and reinforcers earned was analyzed using the exponential model of demand. Although baseline intake was similar across drug conditions, consumption of SM was least affected by increases in cost, indicating that it possessed the highest reinforcing effectiveness (i.e. least elastic). The reinforcing effectiveness of S, SE, and SME did not differ significantly. The finding that the reinforcing effectiveness of the SME was less than that of SM does not support the supposition that BZ and ethanol coadministration is maintained by a higher reinforcing effectiveness of the mixture.
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Affiliation(s)
- E. Andrew Townsend
- Division of Neurobiology and Behavior Research, Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, United States
- Graduate Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, United States
| | - Donna M. Platt
- Division of Neurobiology and Behavior Research, Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, United States
| | - James K. Rowlett
- Division of Neurobiology and Behavior Research, Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, United States
| | - Peter G. Roma
- Institutes for Behavior Resources, Baltimore, MD 21218, United States
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Kevin B. Freeman
- Division of Neurobiology and Behavior Research, Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, United States
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16
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Abstract
Hypothetical purchase tasks have advanced behavioral economic evaluations of demand by circumventing practical and ethical restrictions associated with delivering drug reinforcers to participants. Numerous studies examining the reliability and validity of purchase task methodology suggest that it is a valuable method for assessing demand that warrants continued use and evaluation. Within the literature examining purchase tasks, the alcohol purchase task (APT) has received the most investigation, and currently represents the most experimentally validated variant. However, inconsistencies in purchase task methodology between studies exist, even within APT studies, and, to date, none have assessed the influence of experimental economic constraints on responding. This study examined changes in Q0 (reported consumption when drinks are free), breakpoint (price that suppresses consumption), and α (rate of change in demand elasticity) in the presence of different hypothetical durations of access to alcohol in an APT. One hundred seventy-nine participants (94 males, 85 females) from Amazon Mechanical Turk completed 3 APTs that varied in the duration of time at a party (i.e., access to alcoholic beverages) as described in the APT instructions (i.e., vignette). The 3 durations included 5-hr (used by Murphy et al., 2013), 1-hr, and 9-hr time frames. We found that hypothetical duration of access was significantly related to Q0 and breakpoint at the individual level. Additionally, group-level mean α decreased significantly with increases in duration of access, thus indicating relatively higher demand for alcohol with longer durations of access. We discuss implications for conducting hypothetical purchase task research and alcohol misuse prevention efforts. (PsycINFO Database Record
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17
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King SE, DeWesse TL, Roma PG, Hienz RD, Davis CM. Erythropoietin Provides Neuroprotective Benefits Against Low‐Dose Proton Exposure. FASEB J 2017. [DOI: 10.1096/fasebj.31.1_supplement.815.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Scott E. King
- Division of Behavioral Biology, Department of Psychiatry and Behavioral SciencesJohns Hopkins University School of MedicineBaltimoreMD
- Washington & Jefferson CollegeWashingtonPA
| | - Theodore L DeWesse
- Department of Radiation Oncology and Molecular Radiation SciencesJohns Hopkins University School of MedicineBaltimoreMD
| | | | - Robert D Hienz
- Division of Behavioral Biology, Department of Psychiatry and Behavioral SciencesJohns Hopkins University School of MedicineBaltimoreMD
| | - Catherine M Davis
- Division of Behavioral Biology, Department of Psychiatry and Behavioral SciencesJohns Hopkins University School of MedicineBaltimoreMD
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18
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Davis CM, Roma PG, Hienz RD. The Rodent Psychomotor Vigilance Test (rPVT): A Method for Assessing Neurobehavioral Performance in Rats and Mice. J Vis Exp 2016. [PMID: 28060276 DOI: 10.3791/54629] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The human Psychomotor Vigilance Test (PVT) is a widely used procedure for measuring changes in fatigue and sustained attention. The present article describes a rodent version of the PVT-termed the "rPVT"-that measures similar aspects of attention (i.e., performance accuracy, motor speed, premature responding, and lapses in attention). Data are presented that demonstrate both the short- and long-term usefulness of the rPVT when employed with laboratory rats. Rats easily learn the rPVT, and learning to perform the basic procedure takes less than two weeks of training. Once acquired, rat performances in the rPVT show a high degree of similarity to these same performance measures in the human PVT, including similarities in, lapses in attention, reaction times, vigilance decrements across session time (i.e., the human "time-on-task" effects), and the response-stimulus interval (RSI) effect described for humans. Thus the rPVT can be an extremely valuable tool for assessing the effects of a wide range of variables on sustained attention quite similar to human PVT performances, and thus can be useful for developing novel treatments for neurobehavioral dysfunctions.
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Affiliation(s)
- Catherine M Davis
- Division of Behavioral Biology, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine;
| | - Peter G Roma
- Applied Behavior Biology Unit, Institutes for Behavior Resources
| | - Robert D Hienz
- Division of Behavioral Biology, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine
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Reed DD, Kaplan BA, Becirevic A, Roma PG, Hursh SR. Toward quantifying the abuse liability of ultraviolet tanning: A behavioral economic approach to tanning addiction. J Exp Anal Behav 2016; 106:93-106. [PMID: 27400670 DOI: 10.1002/jeab.216] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 06/22/2016] [Indexed: 11/05/2022]
Abstract
Many adults engage in ultraviolet indoor tanning despite evidence of its association with skin cancer. The constellation of behaviors associated with ultraviolet indoor tanning is analogous to that in other behavioral addictions. Despite a growing literature on ultraviolet indoor tanning as an addiction, there remains no consensus on how to identify ultraviolet indoor tanning addictive tendencies. The purpose of the present study was to translate a behavioral economic task more commonly used in substance abuse to quantify the "abuse liability" of ultraviolet indoor tanning, establish construct validity, and determine convergent validity with the most commonly used diagnostic tools for ultraviolet indoor tanning addiction (i.e., mCAGE and mDSM-IV-TR). We conducted a between-groups study using a novel hypothetical Tanning Purchase Task to quantify intensity and elasticity of ultraviolet indoor tanning demand and permit statistical comparisons with the mCAGE and mDSM-IV-TR. Results suggest that behavioral economic demand is related to ultraviolet indoor tanning addiction status and adequately discriminates between potential addicted individuals from nonaddicted individuals. Moreover, we provide evidence that the Tanning Purchase Task renders behavioral economic indicators that are relevant to public health research. The present findings are limited to two ultraviolet indoor tanning addiction tools and a relatively small sample of high-risk ultraviolet indoor tanning users; however, these pilot data demonstrate the potential for behavioral economic assessment tools as diagnostic and research aids in ultraviolet indoor tanning addiction studies.
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Affiliation(s)
| | | | | | - Peter G Roma
- Institutes for Behavior Resources and Johns Hopkins University School of Medicine
| | - Steven R Hursh
- Institutes for Behavior Resources and Johns Hopkins University School of Medicine
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20
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Davis CM, Roma PG, Hienz RD. A rodent model of the human psychomotor vigilance test: Performance comparisons. J Neurosci Methods 2016; 259:57-71. [PMID: 26639896 DOI: 10.1016/j.jneumeth.2015.11.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 11/17/2015] [Accepted: 11/19/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND The human Psychomotor Vigilance Test (PVT) is commonly utilized as an objective risk assessment tool to quantify fatigue and sustained attention in laboratory, clinical, and operational settings. NEW METHOD Recent studies have employed a rodent version of the PVT (rPVT) to measure various aspects of attention (lapses in attention, reaction times) under varying experimental conditions. RESULTS Data are presented here to evaluate the short- and long-term utility of the rPVT adapted for laboratory rats designed to track the same types of performance variables as the human PVT-i.e., motor speed, inhibitory control ("impulsivity"), and attention/inattention. Results indicate that the rPVT is readily learned by rats and requires less than two weeks of training to acquire the basic procedure. Additional data are also presented on the effects of radiation exposure on these performance measures that indicate the utility of the procedure for assessing changes in neurobehavioral function in rodents across their lifespans. COMPARISON WITH EXISTING METHOD(S) Once stable performances are obtained, rats evidence a high degree of similarity to human performance measures, and include similarities in terms of lapses and reaction times, in addition to percent correct and premature responding. Similar to humans, rats display both a vigilance decrement across time on task and a response-stimulus interval effect. CONCLUSIONS The rPVT is a useful tool in the investigation of the effects of a wide range of variables on vigilance performance that compares favorably to the human PVT and for developing potential prophylactics, countermeasures, and treatments for neurobehavioral dysfunctions.
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Affiliation(s)
- Catherine M Davis
- Division of Behavioral Biology, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Bayview Medical Center, 5510 Nathan Shock Drive, Suite 3000, Baltimore, MD 21224, USA.
| | - Peter G Roma
- Division of Behavioral Biology, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Bayview Medical Center, 5510 Nathan Shock Drive, Suite 3000, Baltimore, MD 21224, USA; Institutes for Behavior Resources, Baltimore, MD, USA.
| | - Robert D Hienz
- Division of Behavioral Biology, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Bayview Medical Center, 5510 Nathan Shock Drive, Suite 3000, Baltimore, MD 21224, USA; Institutes for Behavior Resources, Baltimore, MD, USA.
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21
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Townsend EA, Beloate LN, Huskinson SL, Roma PG, Freeman KB. Corn oil, but not cocaine, is a more effective reinforcer in obese than in lean Zucker rats. Physiol Behav 2015; 143:136-41. [PMID: 25744935 DOI: 10.1016/j.physbeh.2015.03.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 02/03/2015] [Accepted: 03/01/2015] [Indexed: 12/28/2022]
Abstract
Obesity is associated with abnormal brain reactivity in response to palatable food consumption, a factor that may contribute to non-homeostatic eating. However, little is known about how obesity interacts with the reinforcing effects of highly palatable constituents of food (e.g., fat), and if altered reinforcement processes associated with obesity generalize to non-food reinforcers. The current study compared the reinforcing effects of a fat (corn oil) and a drug of abuse (cocaine) in obese and lean Zucker rats. Specifically, obese and lean Zucker rats self-administered corn oil or intravenous cocaine in a behavioral economic demand procedure. For corn oil, maximum demand was higher and demand elasticity was lower in the obese rats compared to their lean counterparts. However, there were no differences in demand for cocaine between the obese and lean rats. These results demonstrate that a fat in the form of corn oil is a more effective reinforcer in obese Zucker rats. However, the fact that demand for cocaine was not different between the obese and lean rats suggests that differences in reward mechanisms may be reinforcer-specific and do not necessarily generalize to non-food reinforcers.
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Affiliation(s)
- Edward A Townsend
- Division of Neurobiology and Behavior Research, Department of Psychiatry and Human Behavior, The University of Mississippi Medical Center, Jackson, MS 39216, United States.
| | - Lauren N Beloate
- Division of Neurobiology and Behavior Research, Department of Psychiatry and Human Behavior, The University of Mississippi Medical Center, Jackson, MS 39216, United States
| | - Sally L Huskinson
- Division of Neurobiology and Behavior Research, Department of Psychiatry and Human Behavior, The University of Mississippi Medical Center, Jackson, MS 39216, United States
| | - Peter G Roma
- Institutes for Behavior Resources, Baltimore, MD 21218, United States; Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21224, United States
| | - Kevin B Freeman
- Division of Neurobiology and Behavior Research, Department of Psychiatry and Human Behavior, The University of Mississippi Medical Center, Jackson, MS 39216, United States
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Davis CM, Roma PG, Armour E, Gooden VL, Brady JV, Weed MR, Hienz RD. Effects of X-ray radiation on complex visual discrimination learning and social recognition memory in rats. PLoS One 2014; 9:e104393. [PMID: 25099152 PMCID: PMC4123910 DOI: 10.1371/journal.pone.0104393] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 07/14/2014] [Indexed: 11/30/2022] Open
Abstract
The present report describes an animal model for examining the effects of radiation on a range of neurocognitive functions in rodents that are similar to a number of basic human cognitive functions. Fourteen male Long-Evans rats were trained to perform an automated intra-dimensional set shifting task that consisted of their learning a basic discrimination between two stimulus shapes followed by more complex discrimination stages (e.g., a discrimination reversal, a compound discrimination, a compound reversal, a new shape discrimination, and an intra-dimensional stimulus discrimination reversal). One group of rats was exposed to head-only X-ray radiation (2.3 Gy at a dose rate of 1.9 Gy/min), while a second group received a sham-radiation exposure using the same anesthesia protocol. The irradiated group responded less, had elevated numbers of omitted trials, increased errors, and greater response latencies compared to the sham-irradiated control group. Additionally, social odor recognition memory was tested after radiation exposure by assessing the degree to which rats explored wooden beads impregnated with either their own odors or with the odors of novel, unfamiliar rats; however, no significant effects of radiation on social odor recognition memory were observed. These data suggest that rodent tasks assessing higher-level human cognitive domains are useful in examining the effects of radiation on the CNS, and may be applicable in approximating CNS risks from radiation exposure in clinical populations receiving whole brain irradiation.
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Affiliation(s)
- Catherine M. Davis
- Division of Behavioral Biology, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- * E-mail:
| | - Peter G. Roma
- Division of Behavioral Biology, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Institutes for Behavior Resources, Baltimore, Maryland, United States of America
| | - Elwood Armour
- Department of Radiation Oncology and Molecular Radiation Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Virginia L. Gooden
- Division of Behavioral Biology, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Joseph V. Brady
- Division of Behavioral Biology, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Institutes for Behavior Resources, Baltimore, Maryland, United States of America
| | - Michael R. Weed
- Division of Behavioral Biology, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Robert D. Hienz
- Division of Behavioral Biology, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Institutes for Behavior Resources, Baltimore, Maryland, United States of America
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Freeman KB, McMaster BC, Roma PG, Woolverton WL. Assessment of the effects of contingent histamine injections on the reinforcing effectiveness of cocaine using behavioral economic and progressive-ratio designs. Psychopharmacology (Berl) 2014; 231:2395-403. [PMID: 24398822 PMCID: PMC4040323 DOI: 10.1007/s00213-013-3396-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 12/03/2013] [Indexed: 02/06/2023]
Abstract
RATIONALE Recent research has demonstrated that the drug, histamine, can function as a punisher of cocaine self-administration. However, little is known about how drug punishers affect the maximum reinforcing effectiveness of drugs as reinforcers. OBJECTIVE The goal of the present study was to determine if histamine, when self-administered as a mixture with cocaine, could reduce cocaine's maximum reinforcing effectiveness using two procedures designed for measuring reinforcing effectiveness. METHODS In the first experiment, rhesus monkeys were allowed to self-administer cocaine (0.1 mg/kg/inj) alone or as a mixture with histamine (0.012-0.05 mg/kg/inj) in a behavioral economic design. In the second experiment, monkeys were allowed to self-administer cocaine alone (0.006-0.56 mg/kg/inj) or as a mixture with histamine (0.025-0.1 mg/kg/inj) under a progressive-ratio schedule of reinforcement. RESULTS In Experiment 1, histamine decreased the reinforcing effectiveness of cocaine in a dose-dependent manner as evidenced by increases in cocaine's demand elasticity with increases in histamine dose. In Experiment 2, histamine decreased cocaine's potency and effectiveness as a reinforcer in a dose-dependent manner as indicated by rightward and downward shifts, respectively, in the dose-response functions. CONCLUSION The reinforcing effectiveness of cocaine can be reduced by contingent self-administration of histamine. These results indicate that combining drug punishers with drug reinforcers reduces the maximum reinforcing effect of the drug reinforcer, which suggests a use for drug punishers as a deterrent to drug abuse (e.g., as mixtures with prescription medications with abuse potential).
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Affiliation(s)
- Kevin B. Freeman
- Division of Neurobiology and Behavior Research Department of Psychiatry and Human Behavior The University of Mississippi Medical Center Jackson, MS 39216
| | - Brian C. McMaster
- Division of Neurobiology and Behavior Research Department of Psychiatry and Human Behavior The University of Mississippi Medical Center Jackson, MS 39216
| | - Peter G. Roma
- Institutes for Behavior Resources Baltimore, MD 21218,Department of Psychiatry and Behavioral Sciences Johns Hopkins University School of Medicine Baltimore, MD 21224
| | - William L. Woolverton
- Division of Neurobiology and Behavior Research Department of Psychiatry and Human Behavior The University of Mississippi Medical Center Jackson, MS 39216
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Davis CM, DeCicco-Skinner KL, Roma PG, Hienz RD. Individual Differences in Attentional Deficits and Dopaminergic Protein Levels following Exposure to Proton Radiation. Radiat Res 2014; 181:258-71. [DOI: 10.1667/rr13359.1] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
The application of economics principles to the analysis of behavior has yielded novel insights on value and choice across contexts ranging from laboratory animal research to clinical populations to national trends of global impact. Recent innovations in demand curve methods provide a credible means of quantitatively comparing qualitatively different reinforcers as well as quantifying the choice relations between concurrently available reinforcers. The potential of the behavioral economic approach to inform public policy is illustrated with examples from basic research, pre-clinical behavioral pharmacology, and clinical drug abuse research as well as emerging applications to public transportation and social behavior. Behavioral Economics can serve as a broadly applicable conceptual, methodological, and analytical framework for the development and evaluation of empirical public policy.
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Affiliation(s)
- Steven R Hursh
- Institutes for Behavior Resources, 2104 Maryland Avenue, Baltimore, MD 21218, USA.
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Tobiansky DJ, Roma PG, Hattori T, Will RG, Nutsch VL, Dominguez JM. The medial preoptic area modulates cocaine-induced activity in female rats. Behav Neurosci 2013; 127:293-302. [PMID: 23565937 DOI: 10.1037/a0031949] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Drugs of abuse exert their effects by exploiting natural neurobiological reward mechanisms, especially the mesolimbic dopamine (DA) system. However, the mesolimbic system does not operate in isolation, and input from other reward-relevant structures may play a role in cocaine's rewarding effects. The medial preoptic area (mPOA) of the hypothalamus is involved in the regulation of two essential and naturally rewarding behaviors: sexual and maternal behaviors. It also makes strong neuroanatomical connections with areas of the mesolimbic system, particularly the ventral tegmental area (VTA). As such, the mPOA is a logical candidate for a neuroanatomical locus modulating activity in the mesolimbic system and emergent behavioral expressions of drug reward, yet the role of this structure is largely unexplored. Here, using a female rat model, we show that the mPOA innervates the VTA in a region-specific manner, that lesions of the mPOA augment cocaine-induced Fos expression in the nucleus accumbens (NAc) and cocaine-induced conditioned place preference. We also show that approximately 68% of mPOA-VTA efferents release γ-aminobutyric acid (GABA), over 75% are sensitive to DA as evidenced by colocalization with DA receptors, and nearly 60% of these contain both DA receptors and GABA, which suggests a novel key role for the mPOA in the inhibition of the mesolimbic DA circuit. Combined, these results reveal the mPOA as a critical modulating structure in cocaine-induced mesolimbic activity and behavioral manifestation of reward, at least in part, via GABAergic output that is sensitive to DA input.
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Affiliation(s)
- Daniel J Tobiansky
- Department of Psychology, University of Texas at Austin, Austin, TX 78712, USA
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Reed DD, Partington SW, Kaplan BA, Roma PG, Hursh SR. Behavioral economic analysis of demand for fuel in North America. J Appl Behav Anal 2013; 46:651-5. [DOI: 10.1002/jaba.64] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 03/13/2013] [Indexed: 12/23/2022]
Affiliation(s)
| | | | | | - Peter G. Roma
- Institutes For Behavior Resources and Johns Hopkins University School of Medicine
| | - Steven R. Hursh
- Institutes For Behavior Resources and Johns Hopkins University School of Medicine
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Goswami N, Batzel JJ, Clément G, Stein TP, Hargens AR, Sharp MK, Blaber AP, Roma PG, Hinghofer-Szalkay HG. Maximizing information from space data resources: a case for expanding integration across research disciplines. Eur J Appl Physiol 2012; 113:1645-54. [PMID: 23073848 DOI: 10.1007/s00421-012-2507-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Accepted: 09/20/2012] [Indexed: 11/30/2022]
Abstract
Regulatory systems are affected in space by exposure to weightlessness, high-energy radiation or other spaceflight-induced changes. The impact of spaceflight occurs across multiple scales and systems. Exploring such interactions and interdependencies via an integrative approach provides new opportunities for elucidating these complex responses. This paper argues the case for increased emphasis on integration, systematically archiving, and the coordination of past, present and future space and ground-based analogue experiments. We also discuss possible mechanisms for such integration across disciplines and missions. This article then introduces several discipline-specific reviews that show how such integration can be implemented. Areas explored include: adaptation of the central nervous system to space; cerebral autoregulation and weightlessness; modelling of the cardiovascular system in space exploration; human metabolic response to spaceflight; and exercise, artificial gravity, and physiologic countermeasures for spaceflight. In summary, spaceflight physiology research needs a conceptual framework that extends problem solving beyond disciplinary barriers. Administrative commitment and a high degree of cooperation among investigators are needed to further such a process. Well-designed interdisciplinary research can expand opportunities for broad interpretation of results across multiple physiological systems, which may have applications on Earth.
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Affiliation(s)
- Nandu Goswami
- Institute of Physiology, Medical University of Graz, Harrachgasse 21, Graz 8010, Austria.
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Banks ML, Roma PG, Folk JE, Rice KC, Negus SS. Effects of the delta-opioid agonist SNC80 on the abuse liability of methadone in rhesus monkeys: a behavioral economic analysis. Psychopharmacology (Berl) 2011; 216:431-9. [PMID: 21369752 PMCID: PMC3557963 DOI: 10.1007/s00213-011-2235-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Accepted: 02/16/2011] [Indexed: 11/28/2022]
Abstract
RATIONALE Delta-opioid agonists enhance the antinociceptive efficacy of methadone and other mu-opioid agonists. However, relatively little is known about the degree to which delta agonists might enhance the abuse-related effects of mu agonists. OBJECTIVE This study used a behavioral economic approach to examine effects of the delta agonist SNC80 [(+)-4-[(αR)-α-((2S,5R)-4-allyl-2,5-dimethyl-1-piperazinyl)-3-methoxybenzyl]-N,N-diethylbenzamide] on the reinforcing effects of methadone in a drug self-administration assay. Interactions between SNC80 and cocaine were also examined for comparison. METHODS Rhesus monkeys (n = 4), surgically implanted with indwelling intravenous catheters, were tested in two phases. In phase 1, drug self-administration dose-effect curves for methadone (0.0032-0.1 mg/kg/injection (inj)) and cocaine (0.0032-0.32 mg/kg/inj) alone were determined under a fixed-ratio 10 (FR 10) schedule of reinforcement. In phase 2, FR values were increased every 3 days (FR 1-FR 1800) during availability of methadone alone (0.032 mg/kg/inj) and in combination with varying proportions of SNC80 (0.1:1, 0.3:1, and 0.9:1 SNC80/methadone) or of cocaine alone (0.032 mg/kg/inj) and in combination with varying proportions of SNC80 (0.33:1, 1:1, and 3:1 SNC80/cocaine). Demand curves related drug intake to FR price, and measures of reinforcement were derived. RESULTS Methadone and cocaine alone each functioned as a reinforcer. SNC80 did not alter measures of reinforcement for either methadone or cocaine. CONCLUSIONS SNC80 at proportions previously shown to enhance methadone-induced antinociception did not enhance the abuse-related effects of methadone. These results support the proposition that delta agonists may selectively enhance mu agonist analgesic effects without enhancing mu agonist abuse liability.
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Affiliation(s)
- Matthew L. Banks
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, 410 North 12th Street, PO Box 980613, Richmond, VA 23298, USA
| | - Peter G. Roma
- Institute for Behavior Resources, Baltimore, MD, USA. Department of Psychiatry and Behavioral Sciences, Johns Hopkins University, Baltimore, MD, USA
| | - John E. Folk
- Chemical Biology Research Branch, National Institute on Drug Abuse, National Institutes of Health, DHHS, Bethesda, MD, USA
| | - Kenner C. Rice
- Chemical Biology Research Branch, National Institute on Drug Abuse, National Institutes of Health, DHHS, Bethesda, MD, USA
| | - S. Stevens Negus
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, 410 North 12th Street, PO Box 980613, Richmond, VA 23298, USA
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Westerman AT, Roma PG, Price RC, Dominguez JM. Assessing the role of the medial preoptic area in ethanol-induced hypothermia. Neurosci Lett 2010; 475:25-8. [PMID: 20302915 PMCID: PMC2868379 DOI: 10.1016/j.neulet.2010.03.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Revised: 03/09/2010] [Accepted: 03/11/2010] [Indexed: 10/19/2022]
Abstract
Administration of ethanol produces hypothermia. The preoptic area/anterior hypothalamus (POA/AH) contains warm- and cold-sensitive neurons that are important for temperature regulation. The present study evaluated the effect of ethanol on Fos immunoreactivity (Fos-ir) in the medial preoptic area (MPOA) and the effect of lesions to the MPOA on ethanol-induced hypothermia. Rats receiving 1.5-g/kg ethanol showed an increase in Fos-ir in the MPOA. However, lesions to the MPOA did not affect core body temperature. These findings indicate that ethanol increases neural activity in the MPOA, but this increased activity does not influence ethanol-induced changes in core body temperature.
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Affiliation(s)
- Ashley T. Westerman
- Department of Psychology, The University of Texas at Austin, Austin, TX USA
- Department of Psychology, American University, Washington, D.C. USA
| | - Peter G. Roma
- Department of Psychology, American University, Washington, D.C. USA
- Institutes for Behavior Resources, Baltimore, MD USA
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD USA
| | - Rebecca C. Price
- Department of Psychology, American University, Washington, D.C. USA
| | - Juan M. Dominguez
- Department of Psychology, The University of Texas at Austin, Austin, TX USA
- Department of Psychology, American University, Washington, D.C. USA
- Institute for Neuroscience, The University of Texas at Austin, Austin, TX USA
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX USA
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Westerman AT, Roma PG, Creed ET, Hurwitz ZE, Dominguez JM. The antiepileptic primidone impairs male rat sexual behavior. Pharmacol Biochem Behav 2009; 93:160-4. [DOI: 10.1016/j.pbb.2009.05.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2008] [Revised: 05/05/2009] [Accepted: 05/05/2009] [Indexed: 11/30/2022]
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Kohut SJ, Roma PG, Davis CM, Zernig G, Saria A, Dominguez JM, Rice KC, Riley AL. The impact of early environmental rearing condition on the discriminative stimulus effects and Fos expression induced by cocaine in adult male and female rats. Psychopharmacology (Berl) 2009; 203:383-97. [PMID: 18953528 PMCID: PMC2661818 DOI: 10.1007/s00213-008-1368-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2008] [Accepted: 10/02/2008] [Indexed: 10/21/2022]
Abstract
RATIONALE A number of environmental manipulations, including maternal separation (MS), have been shown to alter behavioral responses to drugs of abuse. OBJECTIVES This study assessed if MS affected the stimulus and Fos-inducing effects of cocaine. MATERIALS AND METHODS In experiment 1, male and female Sprague-Dawley rats were exposed to brief maternal separations (BMS), long maternal separations (LMS), or animal facility rearing (AFR) and then trained as adults to discriminate cocaine (10 mg/kg, intraperitoneally) from saline. Following training, generalization tests to novel doses of cocaine and other dopaminergic compounds were performed. Assessments of variations in training dose pretreatment times were also made. In experiment 2, male and female rats exposed to MS conditions were administered cocaine or saline for 14 days, and Fos expression in the mesolimbic system was measured. RESULTS In males, BMS retarded the acquisition of the cocaine discrimination. Generalization to novel doses of cocaine did not differ among rearing conditions, but the training dose cue lasted longer in LMS. Distinct generalization and ED(50) profiles were found between male rearing conditions for all dopamine compounds. While BMS females had higher cocaine ED(50) estimates, no other differences were found in females. LMS males and females, as well as AFR females, had significant increases in Fos expression after cocaine in a region-specific manner. No differences were found with other rearing groups. CONCLUSION Early environmental variables altered the stimulus effects (in a sex-dependent manner) as well as the neuronal responsiveness to cocaine, which may be mediated by the dopamine system.
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Affiliation(s)
- Stephen J Kohut
- Psychopharmacology Laboratory, Department of Psychology, American University, Washington, DC 20016, USA.
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Christensen CJ, Silberberg A, Hursh SR, Roma PG, Riley AL. Demand for cocaine and food over time. Pharmacol Biochem Behav 2008; 91:209-16. [PMID: 18692088 DOI: 10.1016/j.pbb.2008.07.009] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2008] [Revised: 07/09/2008] [Accepted: 07/11/2008] [Indexed: 11/17/2022]
Abstract
When reinterpreted, data from Ahmed and Koob [Ahmed, S.H., Koob, G.F., Transition from moderate to excessive drug intake: Change in hedonic set point. Science 1998; 282:298-301.] show that the reinforcing strength of cocaine, an inessential good, increases with experience. However, no such effect obtains with a homeostatically regulated good such as food. The present study evaluated whether this difference could serve to distinguish abused drugs from biologically necessary goods. In Experiment 1, five rats from Christensen, Silberberg, Hursh, Huntsberry and Riley [Christensen, C.J., Silberberg, A., Hursh, S.R., Huntsberry, M.E., Riley, A.L., Essential value of cocaine and food in rats: tests of the exponential model of demand. Psychopharmacology 2008;198(2):221-229.] earned cocaine under a Fixed-Ratio 3 schedule for 7 sessions. Thereafter, in a demand procedure identical to that in Christensen et al., demand was re-assessed by measuring consumption at Fixed Ratios between 3 and 560. In Experiment 2, five different rats from Christensen et al. had their food demand curves re-determined using an identical procedure as the first. When fit with the exponential model, the second determination of cocaine demand in Experiment 1 showed greater essential value than the first, indicating that strength increased with cocaine exposure. In Experiment 2, the re-determined food demand curves showed no change from their initial determination. These results show that the strength of cocaine, but not food, increases with increased experience. Measures of time-based changes in essential value may serve as a basis for distinguishing addictive from non-addictive reinforcers.
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Roma PG, Rinker JA, Serafine KM, Chen SA, Barr CS, Cheng K, Rice KC, Riley AL. Genetic and early environmental contributions to alcohol's aversive and physiological effects. Pharmacol Biochem Behav 2008; 91:134-9. [PMID: 18639579 DOI: 10.1016/j.pbb.2008.06.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2008] [Revised: 06/07/2008] [Accepted: 06/24/2008] [Indexed: 11/15/2022]
Abstract
Genetic and early environmental factors interact to influence ethanol's motivational effects. To explore these issues, a reciprocal cross-fostering paradigm was applied to Fischer and Lewis rats. The adult female offspring received vehicle or the kappa opioid antagonist nor-BNI (1 mg/kg) followed by assessments of conditioned taste aversion (CTA), blood alcohol concentrations (BACs) and hypothermia induced by 1.25 g/kg intraperitoneal ethanol. CTA acquisition in the in-fostered Fischer and Lewis animals did not differ; however, the Fischer maternal environment produced stronger acquisition in the cross-fostered Lewis rats versus their in-fostered counterparts. CTAs in the Fischer rats were not affected by cross-fostering. In extinction, the in-fostered Lewis animals displayed stronger aversions than the Fischer groups on two trials (of 12) whereas the cross-fostered Lewis differed from the Fischer groups on nine trials. Despite these CTA effects, Lewis rats exhibited higher BACs and stronger hypothermic responses than Fischer with no cross-fostering effects in either strain. No phenotypes were affected by nor-BNI. These data extend previous findings dissociating the aversive and peripheral physiological effects of ethanol in female Fischer and Lewis rats, and highlight the importance of genetic and early environmental factors in shaping subsequent responses to alcohol's motivational effects in adulthood.
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Affiliation(s)
- Peter G Roma
- Psychopharmacology Laboratory, Department of Psychology, American University, Washington, DC, USA.
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Abstract
Chen, Lakshminarayanan, and Santos (2006) claim to show in three choice experiments that monkeys react rationally to price and wealth shocks, but, when faced with gambles, display hallmark, human-like biases that include loss aversion. We present three experiments with monkeys and humans consistent with a reinterpretation of their data that attributes their results not to loss aversion, but to differences between choice alternatives in delay of reinforcement.
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Rinker JA, Busse GD, Roma PG, Chen SA, Barr CS, Riley AL. The effects of nicotine on ethanol-induced conditioned taste aversions in Long-Evans rats. Psychopharmacology (Berl) 2008; 197:409-19. [PMID: 18204997 DOI: 10.1007/s00213-007-1050-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2007] [Accepted: 12/10/2007] [Indexed: 11/28/2022]
Abstract
RATIONALE Overall drug acceptability is thought to be a function of the balance between its rewarding and aversive effects, the latter of which is reportedly affected by polydrug use. OBJECTIVES Given that nicotine and alcohol are commonly co-used, the present experiments sought to assess nicotine's impact on ethanol's aversive effects within a conditioned taste aversion design. MATERIALS AND METHODS Experiment 1 examined various doses of nicotine (0, 0.4, 0.8, 1.2 mg/kg) to determine a behaviorally active dose, and experiment 2 examined various doses of ethanol (0, 0.5, 1.0, 1.5 g/kg) to determine a dose that produced intermediate aversions. Experiment 3 then examined the aversive effects of nicotine (0.8 mg/kg) and ethanol (1.0 g/kg) alone and in combination. Additionally, nicotine's effects on blood alcohol concentrations (BAC) and ethanol-induced hypothermia were examined. RESULTS Nicotine and ethanol combined produced aversions significantly greater than those produced by either drug alone or the summed aversive effects of the individual compounds. These effects were unrelated to changes in BAC, but nicotine and ethanol combined produced a prolonged hypothermic effect which may contribute to the increased aversions induced by the combination. CONCLUSIONS These data demonstrate that nicotine may interact with ethanol, increasing ethanol's aversive effects. Although the rewarding effects of concurrently administered nicotine and ethanol were not assessed, these data do indicate that the reported high incidence of nicotine and ethanol co-use is unlikely due to reductions in the aversiveness of ethanol with concurrently administered nicotine. It is more likely attributable to nicotine-related changes in ethanol's rewarding effects.
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Affiliation(s)
- Jennifer A Rinker
- Psychopharmacology Laboratory, Department of Psychology, American University, Washington, DC 20016, USA.
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Silberberg A, Roma PG, Huntsberry ME, Warren-Boulton FR, Sakagami T, Ruggiero AM, Suomi SJ. On Loss Aversion in Capuchin Monkeys. J Exp Anal Behav 2008. [DOI: 10.1901/jeab.2008-89-145] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Roma PG, Davis CM, Kohut SJ, Huntsberry ME, Riley AL. Early maternal separation and sex differences in the aversive effects of amphetamine in adult rats. Physiol Behav 2007; 93:897-904. [PMID: 18230402 DOI: 10.1016/j.physbeh.2007.12.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2007] [Revised: 12/07/2007] [Accepted: 12/13/2007] [Indexed: 01/31/2023]
Abstract
Early life stress increases vulnerability to psychostimulant abuse, sometimes in a sex-dependent manner. These effects are presumably produced by modulation of neurobiological reward mechanisms; however, drug intake is also influenced by sensitivity to the drug's aversive properties, and little is known about the effects of early life stress on stimulant aversion. To assess this possibility, Sprague-Dawley rat litters experienced daily separation from the dam for 3 h (MS) or 15 min (H) on post-natal days 2-14; control litters (AFR) experienced twice-weekly routine animal facility care only. As adults, the animals were tested for conditioned taste aversions (CTA) induced by 1.5, 2.0 or 3.0 mg/kg d-amphetamine administered intraperitoneally over three acquisition trials followed by six drug-free extinction trials (n=7-8/sex/dose/rearing group). All groups acquired significant aversions compared to their vehicle-treated controls, but differential rearing had no effect on CTA acquisition or extinction. Collapsed across rearing groups, females exhibited significantly stronger aversions and slower extinction than their male counterparts at the low 1.5 mg/kg dose, and unlike the males, failed to fully extinguish relative to their vehicle controls at 1.5 and 2.0 mg/kg. These data underscore the importance of sex differences in assays of stimulant abuse liability, and further support the hypothesis that the effects of post-natal stress on the reinforcing efficacy of psychostimulants may be predominantly due to modulation of reward mechanisms.
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Affiliation(s)
- Peter G Roma
- Psychopharmacology Laboratory, Department of Psychology, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA.
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Roma PG, Riley AL. Cross-fostering and the extinction of cocaine's conditioned aversive effects: Evidence for gene-environment interaction. Pharmacol Biochem Behav 2007; 88:1-8. [PMID: 17651789 DOI: 10.1016/j.pbb.2007.06.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2007] [Revised: 05/28/2007] [Accepted: 06/19/2007] [Indexed: 11/25/2022]
Abstract
Although genetic and early environmental factors interact to affect drug abuse in humans, surprisingly few tractable laboratory animal models have been developed. Using reciprocal cross-fostering of the inbred Fischer and Lewis rat strains, we recently reported significant gene-environment interaction effects on responses to the aversive properties of 32 mg/kg subcutaneous cocaine, but only in females [Roma PG., Davis CM, Riley AL. Effects of cross-fostering on cocaine-induced conditioned taste aversions in Fischer and Lewis rats. Dev Psychobiol 2007;49:172-9]. The present study describes a follow-up analysis tracking the extinction of the equally acquired cocaine aversions in the adult male Fischer and Lewis rats raised by either Fischer or Lewis dams (n=11-12/group). Based on mean consumption, after eight saccharin-saline pairings, the in-fostered Fischer rats never extinguished while the Lewis animals fully extinguished; however, the cross-fostered Fischer rats partially extinguished, while extinction was completely suppressed in the cross-fostered Lewis animals. Based on documented strain differences in avoidance behavior and stress reactivity, the data were interpreted in terms of differential sensitivity to conditioned aversive stimulation. These data join other examples of cross-fostering effects on physiology and behavior in these strains and further support the use of the Fischer-Lewis model for exploring gene-environment interaction in drug-induced phenotypes.
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Affiliation(s)
- Peter G Roma
- Psychopharmacology Laboratory, Department of Psychology, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA.
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Roma PG, Silberberg A, Huntsberry ME, Christensen CJ, Ruggiero AM, Suomi SJ. Mark tests for mirror self-recognition in capuchin monkeys (Cebus apella) trained to touch marks. Am J Primatol 2007; 69:989-1000. [PMID: 17253635 DOI: 10.1002/ajp.20404] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In Experiment 1, three capuchin monkeys (Cebus apella) were exposed to a mirror in their home cage for 3 days and then given food treats for touching orange marks located on the surface of an experimental chamber. Following training, a mirror was added to the chamber to see if the monkeys would use it to guide non-reinforced contacts with an orange mark on their foreheads that was only visible as a mirror reflection (mark test). Two monkeys touched the head-mark more often with the mirror present than absent, but no mark touches were emitted while looking at the mirror. In Experiment 2, the monkeys were rewarded for touching orange marks on their bodies that were directly visible, followed by another head-mark test. Again, two monkeys touched the mark more often with the mirror present than absent, but these contacts were not emitted while looking at the mirror. Since facing the mirror while mark touching was not required for reinforcement during training, Experiment 3 further tested the possibility that increased mark touching in the presence of the mirror during Experiments 1 and 2 was the result of a memorial process. For this, a final, novel mark test was conducted using an orange mark on the neck that was only visible as a reflection (Experiment 3). No monkeys passed this test. These are the first mark tests given to capuchin monkeys. The results are consistent with the finding that no monkey species is capable of spontaneous mirror self-recognition. The implications of sequential training and mark testing for comparative evaluations of mirror self-recognition capacity are discussed.
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Affiliation(s)
- Peter G Roma
- Department of Psychology, American University, Washington, DC 20016, USA.
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Roma PG, Chen SA, Barr CS, Riley AL. Dissociation between the aversive and pharmacokinetic effects of ethanol in female Fischer and Lewis rats. Behav Brain Res 2007; 182:51-6. [PMID: 17568694 PMCID: PMC1994208 DOI: 10.1016/j.bbr.2007.05.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2007] [Revised: 04/25/2007] [Accepted: 05/07/2007] [Indexed: 01/22/2023]
Abstract
In humans and laboratory animal models, vulnerability to alcohol abuse is influenced by endogenous factors such as genotype. Using the inbred Fischer and Lewis rat strains, we previously reported stronger conditioned taste aversions (CTA) in male Fischer rats that could not be predicted by genotypic differences in alcohol absorption [Roma PG, Flint WW, Higley JD, Riley AL. Assessment of the aversive and rewarding effects of alcohol in Fischer and Lewis rats. Psychopharmacology (Berl) 2006;189:187-99]. The present study made similar assessments in Fischer and Lewis females via four-trial CTA induced by 1 or 1.5 g/kg intraperitoneal (IP) ethanol (n=10-12/strain/dose) as well as measures of blood alcohol concentrations (BAC) at 15, 60 and 180 min post-injection with 1.5 g/kg IP ethanol or saline (n=7-8/strain/dose). Dose-dependent CTAs were produced, but the strains did not differ from each other in these measures; however, BACs in the Lewis females were significantly higher than Fischer at all three time points. As with males of the Fischer and Lewis genotypes, a dissociation between BACs and the aversive effects of alcohol was observed. These data are the first assessments of these particular phenotypes in Fischer and Lewis females, and when considered with the historical data, suggest a Genotype x Sex interaction in the centrally mediated sensitivity to alcohol's aversive effects.
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Affiliation(s)
- Peter G Roma
- Psychopharmacology Laboratory, Department of Psychology, American University, 4400 Massachusetts Avenue, NW, Washington, DC, USA.
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Abstract
The systematic comparison between Fischer and Lewis rats is a popular animal model of genetic factors in drug abuse. Although genetic and environmental factors interact to affect drug abuse in humans, analogous effects have not yet been reported within the Fischer-Lewis model. In order to assess the contributions and interaction of genotype and early maternal environment on responses to a drug of abuse, the present study employed a cross-fostering design, where male and female Fischer and Lewis pups were reared by unrelated dams of their own strain (in-fostered) or of the other strain (cross-fostered). As adults, rats from both strains were tested for their ability to acquire a conditioned taste aversion to a novel saccharin solution that had been repeatedly paired with an injection of cocaine (32 mg/kg, subcutaneous). In-fostered Fischer females acquired significantly weaker aversions than in-fostered Lewis females across the multiple saccharin-cocaine pairings. However, cross-fostered Fischer females exhibited aversions that were not only significantly stronger than their in-fostered Fischer counterparts, but identical to all groups of the Lewis genotype. No strain differences or cross-fostering effects were observed in the males. The data with the female subjects cannot be accounted for simply by the genetic strain of the subjects and demonstrate a clear gene-environment interaction effect on responses to the aversive effects of cocaine in Fischer and Lewis rats. Implications for studying maternal behavior as a source of epigenetic modulation of drug abuse vulnerability were discussed.
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Affiliation(s)
- Peter G Roma
- Psychopharmacology Laboratory Department of Psychology American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA.
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Roma PG, Huntsberry ME, Riley AL. Separation stress, litter size, and the rewarding effects of low-dose morphine in the dams of maternally separated rats. Prog Neuropsychopharmacol Biol Psychiatry 2007; 31:429-33. [PMID: 17182163 DOI: 10.1016/j.pnpbp.2006.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2006] [Revised: 10/12/2006] [Accepted: 11/03/2006] [Indexed: 11/29/2022]
Abstract
Potential differences in sensitivity to the rewarding effects of morphine as a function of litter separation stress were assessed in post-weaning rat dams. During the first two weeks postnatal, Sprague-Dawley rat litters were subjected to daily 15- or 180-min sessions of dam-pup separation while control litters only experienced twice-weekly animal facility care. One week after weaning, the dams (n=7 per group) underwent a fully unbiased conditioned place preference (CPP) procedure to 1 mg/kg subcutaneous morphine. CPP responses after each conditioning cycle were recorded. Rates of acquisition and asymptotic levels of CPP were comparable in all groups; however, an inverse relationship between litter size and magnitude of morphine CPP was revealed. Although these initial data indicate no differential sensitivity to the rewarding effects of low-dose morphine produced by the stress of litter separation, this assessment of litter size and drug-induced place conditioning in post-weaning litter-separated dams is the first of its kind. Potential effects of other doses, drugs of abuse and post-partum manipulations remain to be evaluated within this emerging etiological model.
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Affiliation(s)
- Peter G Roma
- Psychopharmacology Laboratory, Department of Psychology, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA.
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Davis CM, Roma PG, Dominguez JM, Riley AL. Morphine-induced place conditioning in Fischer and Lewis rats: acquisition and dose-response in a fully biased procedure. Pharmacol Biochem Behav 2007; 86:516-23. [PMID: 17306352 DOI: 10.1016/j.pbb.2007.01.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2006] [Revised: 01/08/2007] [Accepted: 01/12/2007] [Indexed: 10/23/2022]
Abstract
The Fischer (F344) and Lewis (LEW) rat strains differ on a variety of behavioral assays examining the effects of morphine, with many of the differences observed during acquisition of behavioral responses. The results of these studies and others examining endogenous physiology and the biochemical effects of morphine suggest that F344 rats are more sensitive to morphine than LEW rats. However, LEW animals have shown greater conditioned place preferences (CPP) to 4 mg/kg than F344 rats. CPP is a popular assay of drug reward in which acquisition of the preference can be measured across multiple conditioning cycles, yet this aspect of CPP has not been assessed in F344 and LEW rats. As part of an ongoing effort to fully characterize the conditioned rewarding effects of abused drugs in these strains, the present study assessed the effects of 0, 1, 4 and 10 mg/kg subcutaneous (SC) morphine in adult male F344 and LEW rats (n=12/strain/dose). A fully biased place conditioning procedure was employed where morphine's effects were paired with the initially non-preferred chamber on Day 1, saline was paired with the preferred chamber on Day 2 and drug-free access to the entire apparatus was allowed on Day 3. This conditioning and testing regimen was repeated for four consecutive cycles. The F344 animals acquired CPP at 1 mg/kg only; this effect emerged after only two conditioning cycles. LEW rats never acquired a CPP at any dose tested. Peak blood morphine levels following SC injections of 1, 4 or 10 mg/kg revealed no significant strain or dose effects. These behavioral data are consistent with the hypothesis that F344 rats are more sensitive to the rewarding effects of morphine than LEW rats. Additional implications for the Fischer-Lewis model of drug abuse and the utility of CPP acquisition procedures are discussed.
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Affiliation(s)
- Catherine M Davis
- Psychopharmacology Laboratory, Department of Psychology, American University, Washington, DC 20016, USA.
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Roma PG, Flint WW, Higley JD, Riley AL. Assessment of the aversive and rewarding effects of alcohol in Fischer and Lewis rats. Psychopharmacology (Berl) 2006; 189:187-99. [PMID: 17013639 DOI: 10.1007/s00213-006-0553-6] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2006] [Accepted: 07/31/2006] [Indexed: 11/26/2022]
Abstract
RATIONALE Application of the Fischer-Lewis genetic model of drug abuse to the study of alcohol's motivational properties has been limited. OBJECTIVES To assess the aversive and rewarding effects of ethanol in Fischer and Lewis rats. MATERIALS AND METHODS Fischer and Lewis rats underwent a four-trial combined conditioned taste aversion/conditioned place preference procedure (CTA/CPP; 0, 1, 1.25, or 1.5 g/kg IP ethanol). Others received 0, 1, or 1.5 g/kg followed by tail blood sampling at 15-, 60- and 180-min post-injection. In additional groups, hypothermia to 0, 1.5, and 3 g/kg was assessed before and 30- and 60-min post-injection. RESULTS All alcohol-treated groups except low-dose Lewis acquired CTA after one trial. Fischer rats developed stronger CTAs than Lewis at 1.25 and 1.5 g/kg. Ethanol-induced reward in taste or place conditioning was not evident in either strain. Lewis animals showed overall higher peak blood alcohol concentrations, but hypothermia did not vary by strain. CONCLUSION Compared to Fischer, Lewis rats are less sensitive to alcohol's aversive effects as assessed in the CTA paradigm. The behavioral differences observed are not due to hypothermia, but pharmacokinetic differences may contribute. These data underscore the importance of genetic factors and the aversive effects of initial drug exposures in modeling vulnerability to abuse. In addition to its application with other drugs, the Fischer-Lewis model may be useful for investigating the biobehavioral bases of alcohol abuse.
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Affiliation(s)
- Peter G Roma
- Psychopharmacology Laboratory, Department of Psychology, American University, Washington, DC 20016, USA.
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Roma PG, Champoux M, Suomi SJ. Environmental Control, Social Context, and Individual Differences in Behavioral and Cortisol Responses to Novelty in Infant Rhesus Monkeys. Child Dev 2006; 77:118-31. [PMID: 16460529 DOI: 10.1111/j.1467-8624.2006.00860.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The effects of appetitive controllability on behavioral and cortisol reactivity to novelty in 12 infant rhesus monkeys were studied. Surrogate-peer-reared infants had homecage access to food treats contingently via lever pressing ("master") or noncontingently ("yoked") for 12 weeks from postnatal month 2. Masters lever-pressed more, but did not differ in baseline cortisol. At month 5, infants were exposed to a novel environment in social groups and individually. Masters were significantly more active and exhibited significantly lower cortisol reactivity to the novel environment, but only in the individual context. Also, individual differences in operant behavior were positively correlated with behavioral activity and negatively correlated with cortisol reactivity to the novel environment. The results reveal context-specific benefits of contingent stimulation in infancy.
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Affiliation(s)
- Peter G Roma
- National Institute of Child Health and Human Development, USA.
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Abstract
P. G. Roma, A. Silberberg, A. M. Ruggiero, and S. J. Suomi (2006) noted that the results S. F. Brosnan and F. B. M. de Waal (2003) attributed to inequity aversion could also be explained as a frustration effect. Roma et al. redressed this confound by designing a procedure that could have supported either of these interpretations. Nevertheless, they found that only a frustration effect accounted for both their data and those of Brosnan and de Waal (2003). The criticisms Brosnan and de Waal (2006) offered of Roma et al. ignored the fact that Brosnan and de Waal's (2003) research design was not capable of offering an unequivocal demonstration of inequity aversion. This conclusion holds no matter what the claimed inadequacies of Roma et al.'s procedures might have been. Caution is urged in inferring the existence of inequity aversion in nonhuman primates.
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Affiliation(s)
- Alan Silberberg
- Department of Psychology, American University, Washington, DC 20016, USA
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Abstract
Each of 4 female capuchin monkeys ("model") was paired with another female capuchin ("witness") in an adjacent cage. In Phases 1 and 3, a model could remove a grape from the experimenter's hand while the witness watched. The witness was then offered a slice of cucumber, a less preferred food. Trials alternated between subjects 50 times, defining a session. In Phases 2 and 4, both were offered cucumber. Witness rejections of cucumber were infrequent and were not dependent on whether models received grape or cucumber. When models were offered cucumber, they rejected it at higher rates than did witnesses. These results fail to support findings of Brosnan and de Waal. An account based on the frustration effect accommodates these results and those of Brosnan and de Waal.
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Roma PG, Riley AL. Apparatus bias and the use of light and texture in place conditioning. Pharmacol Biochem Behav 2005; 82:163-9. [PMID: 16143377 DOI: 10.1016/j.pbb.2005.08.004] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2005] [Revised: 08/05/2005] [Accepted: 08/10/2005] [Indexed: 11/19/2022]
Abstract
In a typical conditioned place preference (CPP) preparation, animals alternately experience drug and vehicle effects in distinct chambers of an apparatus, spending more time in the drug-paired chamber post-conditioning. However, if all animals prefer the same chamber before conditioning, data interpretation may be compromised. Unbiased apparatus has been systematically validated with ethanol in mice ([Cunningham, C.L., Feree, N.K., Howard, M.A. Apparatus bias and place conditioning with ethanol in mice. Psychopharmacology (Berl) 2003;170:409-422]); the present study sought to identify and eliminate bias in a standard black-and-white apparatus and validate that apparatus for CPP with morphine and cocaine in rats. Apparatus bias was assessed in 24 adult female Sprague-Dawley rats. Subjects preferred the black chamber under bright lighting conditions, with no preference in the dark. Subjects then underwent a counterbalanced CPP regimen to 5 mg/kg SC morphine (n=12) or 20 mg/kg IP cocaine (n=12) using only tactile conditioned stimuli. Significant absolute preferences for the drug-paired chamber were produced by both drugs, with no effect of drug-paired chamber assignment on CPP expression; vehicle-treated controls (n=12) showed no preferences. Bias-free CPP to morphine and cocaine using standard apparatus in rats is possible. Implications for place conditioning are discussed, including the potential value of systematically exploiting apparatus bias in addition to eliminating it.
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Affiliation(s)
- Peter G Roma
- Psychopharmacology Laboratory, Department of Psychology, American University, 4400 Massachusetts Avenue NW, Washington, DC 20016, USA.
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