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Emadi Andani M, Barbiani D, Bonetto M, Menegaldo R, Villa-Sánchez B, Fiorio M. Preserving the placebo effect after disclosure: A new perspective on non-deceptive placebos. Br J Psychol 2024. [PMID: 38226695 DOI: 10.1111/bjop.12696] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 12/07/2023] [Accepted: 01/08/2024] [Indexed: 01/17/2024]
Abstract
The present study explores whether a particular style of placebo disclosure could serve as a tool to foster a renewed trust in one's own inherent resources and elicit a meaningful placebo effect. In a motor performance task, two placebo groups received inert transcutaneous electrical nerve stimulation (TENS) in each of four sessions along with information on its force-enhancing properties. Before the final session, one of the placebo groups was informed about the placebo, which was portrayed as a means to unleash an inherent potential. Along with force, we systematically monitored task-specific self-efficacy to test whether this variable would be differentially modulated in the two placebo groups. Compared to two control groups, placebo groups showed higher force and self-efficacy in the last session. No differences in self-efficacy were observed in the placebo groups even after revealing the placebo procedure, suggesting that the disclosure was effective in 'safeguarding' individuals' self-efficacy. These findings may have important implications, paving the way for the use of placebos that not only are ethically permissible but also support individuals' self-efficacy.
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Affiliation(s)
- Mehran Emadi Andani
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Diletta Barbiani
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
- Department of Psychology, Università Cattolica del Sacro Cuore, Milan, Italy
| | - Marco Bonetto
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Rudy Menegaldo
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | | | - Mirta Fiorio
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
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Pagnini F, Barbiani D, Cavalera C, Volpato E, Grosso F, Minazzi GA, Vailati Riboni F, Graziano F, Di Tella S, Manzoni GM, Silveri MC, Riva G, Phillips D. Placebo and Nocebo Effects as Bayesian-Brain Phenomena: The Overlooked Role of Likelihood and Attention. Perspect Psychol Sci 2023; 18:1217-1229. [PMID: 36656800 DOI: 10.1177/17456916221141383] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [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] [Indexed: 01/20/2023]
Abstract
The Bayesian-brain framework applied to placebo responses and other mind-body interactions suggests that the effects on the body result from the interaction between priors, such as expectations and learning, and likelihood, such as somatosensorial information. Significant research in this area focuses on the role of the priors, but the relevance of the likelihood has been surprisingly overlooked. One way of manipulating the relevance of the likelihood is by paying attention to sensorial information. We suggest that attention can influence both precision and position (i.e., the relative distance from the priors) of the likelihood by focusing on specific components of the somatosensorial information. Two forms of attention seem particularly relevant in this framework: mindful attention and selective attention. Attention has the potential to be considered a "major player" in placebo/nocebo research, together with expectations and learning. In terms of application, relying on attentional strategies as "amplifiers" or "silencers" of sensorial information could lead to an active involvement of individuals in shaping their care process and health. In this contribution, we discuss the theoretical implications of these intuitions with the aim to provide a comprehensive framework that includes Bayesian brain, placebo/nocebo effects, and the role of attention in mind-body interactions.
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Affiliation(s)
| | - Diletta Barbiani
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona
| | - Cesare Cavalera
- Department of Psychology, Università Cattolica del Sacro Cuore
| | - Eleonora Volpato
- Department of Psychology, Università Cattolica del Sacro Cuore
- IRCCS Fondazione Don Carlo Gnocchi, Milan, Italy
| | | | | | | | - Francesca Graziano
- Bicocca Bioinformatics Biostatistics and Bioimaging B4 Center, University of Milano-Bicocca
- School of Medicine and Surgery, University of Milano
| | - Sonia Di Tella
- Department of Psychology, Università Cattolica del Sacro Cuore
| | | | | | - Giuseppe Riva
- Applied Technology for Neuro-Psychology Lab, Istituto Auxologico Italiano IRCCS
- Humane Technology Lab., Catholic University of Milan
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Fiorio M, Braga M, Marotta A, Villa-Sánchez B, Edwards MJ, Tinazzi M, Barbiani D. Functional neurological disorder and placebo and nocebo effects: shared mechanisms. Nat Rev Neurol 2022; 18:624-635. [PMID: 36075980 DOI: 10.1038/s41582-022-00711-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2022] [Indexed: 11/09/2022]
Abstract
Functional neurological disorder (FND) is characterized by neurological symptoms that cannot be explained by a structural neurological cause. Among the different aetiological models that have been proposed for FND, of note is the Bayesian predictive coding model, which posits that perception relies on top-down cortical predictions (priors) to infer the source of incoming sensory information. This model can also apply to non-pathological experiences, such as placebo and nocebo effects, wherein sensory information is shaped by prior expectations and learning. To date, most studies of the relationship between placebo and nocebo effects and FND have focused on the use of placebos for diagnosis and treatment of FND. Here, we propose that this relationship might go beyond diagnosis and therapy. We develop a framework in which shared cognitive, personality and neuroanatomical factors justify the consideration of a deeper link between FND and placebo and nocebo effects. This new perspective might offer guidance for clarification of the pathogenesis of FND and for the identification of potential biomarkers and therapeutic targets.
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Affiliation(s)
- Mirta Fiorio
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy.
| | - Miriam Braga
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Angela Marotta
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | | | - Mark J Edwards
- Institute of Molecular and Clinical Sciences, St George's University of London, London, UK
| | - Michele Tinazzi
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Diletta Barbiani
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
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Dottor A, Camerone E, Job M, Barbiani D, Frisaldi E, Testa M. A new visual feedback-based system for the assessment of pinch force, endurance, accuracy and precision. A test-retest reliability study. Hand Ther 2021; 26:53-62. [PMID: 37969174 PMCID: PMC10634379 DOI: 10.1177/17589983211002550] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 02/17/2021] [Indexed: 11/17/2023]
Abstract
Introduction Given that pinch is a precision grip involved in sustained submaximal activities, a Sustained Contraction (SC) task could be associated to Maximal Voluntary Contraction (MVC). To better evaluate the thumb-index system, the test-retest reliability of pinch MVC and SC, measured by a visual feedback-based pinch gauge was assessed. Methods 26 healthy participants performed MVC and SC in two separate sessions. SC required to maintain 40%MVC as long as possible and it was evaluated in terms of time, accuracy (Mean Distance between force trace and target force, MD), precision (Coefficient of Variability of force trace, CV). MD and CV analyses were conducted dividing the SC task into three equivalent time stages (beginning, middle, exhaustion). Relative Reliability (RR) was measured by Intraclass Correlation Coefficient, and Absolute Reliability (AR) was measured by Standard Error of Measurement and by Bland-Altman plot. Results MVC and Time showed high RR and AR in both hands. RR of MD and CV in right hand was excellent in the beginning and middle stages, and fair in the exhaustion one, showing decreasing reliability as fatigue increases. In the left hand RR of MD and CV was generally lower. MD showed excellent reliability in the beginning stage and good reliability in the other stages. CV showed fair relative reliability at both beginning and middle stages, excellent in the last one. Conversely, it was observed high AR of MD and CV in all stages in both hands. Conclusions All indices are reliable to assess motor control of thumb-index pinch in both hands.
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Affiliation(s)
- Alberto Dottor
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
| | - Eleonora Camerone
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
| | - Mirko Job
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
| | - Diletta Barbiani
- Department of Neuroscience, University of Turin Medical School, Turin, Italy
| | - Elisa Frisaldi
- Department of Neuroscience, University of Turin Medical School, Turin, Italy
| | - Marco Testa
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
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Frisaldi E, Bottino P, Fabbri M, Trucco M, De Ceglia A, Esposito N, Barbiani D, Camerone EM, Costa F, Destefanis C, Milano E, Massazza G, Zibetti M, Lopiano L, Benedetti F. Effectiveness of a dance-physiotherapy combined intervention in Parkinson's disease: a randomized controlled pilot trial. Neurol Sci 2021; 42:5045-5053. [PMID: 33743108 DOI: 10.1007/s10072-021-05171-9] [Citation(s) in RCA: 3] [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: 12/29/2020] [Accepted: 03/06/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Physical therapies have been recommended as crucial components in Parkinson's disease (PD) rehabilitation. OBJECTIVE The study aims to examine the effectiveness of a new dance-physiotherapy combined intervention, called DArT method, in mild PD patients. METHODS A prospective, randomized, single-blind, controlled pilot trial was conducted on 38 mild PD patients under dopaminergic therapy. The intervention consisted in an add-on protocol: the control group received 1 h of conventional physiotherapy followed by 1 h of conventional physiotherapy each day, 3 times a week, for 5 weeks. The experimental group received 1 h of conventional physiotherapy followed by 1 h of dance class each day, 3 times a week, for 5 weeks. The week before and after the training period, patients were assessed for motor, cognitive, emotional, and sensory components of PD, with MDS-UPDRS-III as primary outcome measure. RESULTS DArT method was associated with a 2.72-point reduction in the post-treatment MDS-UPDRS-III total score compared to control group (95% CI - 5.28, - 0.16, p = 0.038, d = 0.71), and with a 2.16-point reduction in the post-treatment MDS-UPDRS-III upper body subscore (95% CI - 3.56, - 0.76, p = 0.003, d = 1.02). Conversely, conventional physiotherapy program was associated with a 2.95-point reduction in the post-treatment trait anxiety compared to the experimental group (95% CI 0.19, 5.71, p = 0.037, d = 0.70). Withdrawal and fall rates were equal to 0% in both groups. CONCLUSION DArT method showed to be safe, well accepted, and more effective than an intensive program of conventional physiotherapy in improving motor impairment in mild PD.
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Affiliation(s)
- Elisa Frisaldi
- Rita Levi-Montalcini Department of Neuroscience, University of Turin Medical School, corso Raffaello 30, 10125, Turin, Italy.
| | - Piero Bottino
- Division of Physical and Rehabilitation Medicine, Presidio Sanitario San Camillo, Turin, Italy
| | - Margherita Fabbri
- Rita Levi-Montalcini Department of Neuroscience and Regional Reference Center of Movement Disorders, University of Turin Medical School, Turin, Italy.,Department of Neurosciences, Clinical Investigation Center CIC 1436, Parkinson Toulouse Expert Centre, NS-Park/FCRIN Network and Neuro Toul COEN Centre; Toulouse University Hospital; INSERM; University of Toulouse 3, Toulouse, France
| | - Marco Trucco
- Division of Physical and Rehabilitation Medicine, Presidio Sanitario San Camillo, Turin, Italy
| | - Alessandra De Ceglia
- Division of Physical and Rehabilitation Medicine, Presidio Sanitario San Camillo, Turin, Italy
| | - Nadia Esposito
- Division of Physical and Rehabilitation Medicine, Presidio Sanitario San Camillo, Turin, Italy
| | - Diletta Barbiani
- Rita Levi-Montalcini Department of Neuroscience, University of Turin Medical School, corso Raffaello 30, 10125, Turin, Italy
| | - Eleonora Maria Camerone
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genova, Campus of Savona, Savona, Italy
| | - Federico Costa
- Division of Physical and Rehabilitation Medicine, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Cristina Destefanis
- Division of Physical and Rehabilitation Medicine, Presidio Sanitario San Camillo, Turin, Italy
| | - Edoardo Milano
- Division of Physical and Rehabilitation Medicine, Presidio Sanitario San Camillo, Turin, Italy
| | - Giuseppe Massazza
- Division of Physical and Rehabilitation Medicine, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Maurizio Zibetti
- Rita Levi-Montalcini Department of Neuroscience and Regional Reference Center of Movement Disorders, University of Turin Medical School, Turin, Italy
| | - Leonardo Lopiano
- Rita Levi-Montalcini Department of Neuroscience and Regional Reference Center of Movement Disorders, University of Turin Medical School, Turin, Italy
| | - Fabrizio Benedetti
- Rita Levi-Montalcini Department of Neuroscience, University of Turin Medical School, corso Raffaello 30, 10125, Turin, Italy.,Medicine and Physiology of Hypoxia, Plateau Rosà, Switzerland
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Piedimonte A, Barbiani D, Benedetti F, Zamfira DA, Carlino E. The placebo effect in breath holding: a preliminary behavioral investigation. Neurosci Lett 2020; 739:135434. [PMID: 33091438 DOI: 10.1016/j.neulet.2020.135434] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 06/23/2020] [Revised: 10/13/2020] [Accepted: 10/14/2020] [Indexed: 11/28/2022]
Abstract
PURPOSE This study seeks to evaluate effects of expectations and conditioning on dry breath holding. METHODS Sixty healthy volunteers were subdivided into 3 groups and were tested across 4 breath holding trials. Participants of the Control group (C) did not undergo any manipulation. Participants of the placebo (P) and nocebo (N) groups were told that they would inhale O2 (actually sham O2) or CO2 (actually sham CO2) along with opposite information that this would enhance or worsen their breath holding time, respectively. Opposite conditioning paradigms based on false visual feedback were employed to reinforce participants' positive (placebo) and negative (nocebo) beliefs. RESULTS The P group showed the greater increase in breath holding time from baseline to the last trial (p = 0.0001) and the longest breath holding time in the last trial compared to the C group (p = 0.02) and the N group (p = 0.0001). Additionally, in the last trial the P group showed a greater decrease in peripheral oxygen saturation (SpO2) as compared to the C group (p = 0.04) and the N group (p = 0.001). Heart rate (HR) was accelerated in the N group during breath holding (in comparison to the P group [p = 0.04] and C group [p = 0.04]). CONCLUSIONS Psychological components can affect behavioral and physiological parameters in breath holding. This study may inform future research about the role of placebo and nocebo effects for conditions in which critical functions are at play.
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Affiliation(s)
| | - Diletta Barbiani
- Department of Neuroscience "Rita Levi Montalcini", University of Turin, Italy
| | - Fabrizio Benedetti
- Department of Neuroscience "Rita Levi Montalcini", University of Turin, Italy; Medicine & Physiology of Hypoxia, Plateau Rosa Laboratories, Breuil-Cervinia, Italy, Zermatt, Switzerland
| | | | - Elisa Carlino
- Department of Neuroscience "Rita Levi Montalcini", University of Turin, Italy.
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Benedetti F, Frisaldi E, Barbiani D, Camerone E, Shaibani A. Nocebo and the contribution of psychosocial factors to the generation of pain. J Neural Transm (Vienna) 2019; 127:687-696. [DOI: 10.1007/s00702-019-02104-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 11/12/2019] [Indexed: 12/17/2022]
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Beedie C, Benedetti F, Barbiani D, Camerone E, Lindheimer J, Roelands B. Incorporating methods and findings from neuroscience to better understand placebo and nocebo effects in sport. Eur J Sport Sci 2019; 20:313-325. [PMID: 31573836 PMCID: PMC10181912 DOI: 10.1080/17461391.2019.1675765] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Placebo and nocebo effects are a factor in sports performance. However, the majority of published studies in sport science are descriptive and speculative regarding mechanisms. It is therefore not unreasonable for the sceptic to argue that placebo and nocebo effects in sport are illusory, and might be better explained by variations in phenomena such as motivation. It is likely that, in sport at least, placebo and nocebo effects will remain in this empirical grey area until researchers provide stronger mechanistic evidence. Recent research in neuroscience has identified a number of consistent, discrete and interacting neurobiological and physiological pathways associated with placebo and nocebo effects, with many studies reporting data of potential interest to sport scientists, for example relating to pain, fatigue and motor control. Findings suggest that placebos and nocebos result in activity of the opioid, endocannabinoid and dopamine neurotransmitter systems, brain regions including the motor cortex and striatum, and measureable effects on the autonomic nervous system. Many studies have demonstrated that placebo and nocebo effects associated with a treatment, for example an inert treatment presented as an analgesic or stimulant, exhibit mechanisms similar or identical to the verum or true treatment. Such findings suggest the possibility of a wide range of distinct placebo and nocebo mechanisms that might influence sports performance. In the present paper, we present some of the findings from neuroscience. Focussing on fatigue as an outcome and caffeine as vehicle, we propose three approaches that researchers in sport might incorporate in their studies in order to better elucidate mechanisms of placebo/nocebo effects on performance.
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Affiliation(s)
- Christopher Beedie
- School of Psychology, University of Kent, Canterbury, UK
- CHX Performance, London, UK
| | - Fabrizio Benedetti
- Medicine and Physiology of Hypoxia, Plateau Rosà, Italy/Switzerland
- Neuroscience Dept, University of Turin Medical School, Turin, Italy
| | - Diletta Barbiani
- Neuroscience Dept, University of Turin Medical School, Turin, Italy
| | | | - Jacob Lindheimer
- Department of Veterans Affairs, William S. Middleton Veterans Memorial Hospital, Madison, WI, USA
- Department of Kinesiology, University of Wisconsin–Madison, Madison, WI, USA
| | - Bart Roelands
- Department of Human Physiology, Vije Universiteit Brussels, Belgium
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Beedie C, Benedetti F, Barbiani D, Camerone E, Cohen E, Coleman D, Davis A, Elsworth-Edelsten C, Flowers E, Foad A, Harvey S, Hettinga F, Hurst P, Lane A, Lindheimer J, Raglin J, Roelands B, Schiphof-Godart L, Szabo A. Consensus statement on placebo effects in sports and exercise: The need for conceptual clarity, methodological rigour, and the elucidation of neurobiological mechanisms. Eur J Sport Sci 2018; 18:1383-1389. [PMID: 30114971 DOI: 10.1080/17461391.2018.1496144] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
In June 2017 a group of experts in anthropology, biology, kinesiology, neuroscience, physiology, and psychology convened in Canterbury, UK, to address questions relating to the placebo effect in sport and exercise. The event was supported exclusively by Quality Related (QR) funding from the Higher Education Funding Council for England (HEFCE). The funder did not influence the content or conclusions of the group. No competing interests were declared by any delegate. During the meeting and in follow-up correspondence, all delegates agreed the need to communicate the outcomes of the meeting via a brief consensus statement. The two specific aims of this statement are to encourage researchers in sport and exercise science to 1. Where possible, adopt research methods that more effectively elucidate the role of the brain in mediating the effects of treatments and interventions. 2. Where possible, adopt methods that factor for and/or quantify placebo effects that could explain a percentage of inter-individual variability in response to treatments and intervention.
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Affiliation(s)
- Christopher Beedie
- a Human & Life Sciences , Canterbury Christ Church University , Canterbury , UK
| | | | - Diletta Barbiani
- b Department of Neuroscience , University of Turin , Turin , Italy
| | | | - Emma Cohen
- d Institute of Cognitive & Evolutionary Anthropology , University of Oxford , Oxford , UK
| | - Damian Coleman
- a Human & Life Sciences , Canterbury Christ Church University , Canterbury , UK
| | - Arran Davis
- d Institute of Cognitive & Evolutionary Anthropology , University of Oxford , Oxford , UK
| | | | - Elliott Flowers
- e School of Sport, Rehabilitation and Exercise Science , University of Essex , Colchester , UK
| | - Abby Foad
- a Human & Life Sciences , Canterbury Christ Church University , Canterbury , UK
| | - Simon Harvey
- a Human & Life Sciences , Canterbury Christ Church University , Canterbury , UK
| | - Florentina Hettinga
- e School of Sport, Rehabilitation and Exercise Science , University of Essex , Colchester , UK
| | - Philip Hurst
- f School of Sport, Exercise and Rehabilitation Sciences , University of Birmingham , Birmingham , UK
| | - Andrew Lane
- g Faculty of Education Health and Wellbeing , University of Wolverhampton , Wolverhampton , UK
| | - Jacob Lindheimer
- h War Related Illness and Injury Study Center , US Department of Veterans Affairs , East Orange , NJ , USA
| | - John Raglin
- i School of Public Health , Indiana University , Bloomington , IN , USA
| | - Bart Roelands
- j Department of Human Physiology , Vrije Universiteit Brussel , Brussels , Belgium
| | - Lieke Schiphof-Godart
- k Faculty of Health, Nutrition & Sports , The Hague University of Applied Sciences , Hague , The Netherlands
| | - Attila Szabo
- l Institute of Health Promotion and Sport Sciences , ELTE Eötvös Loránd University , Budapest , Hungary
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Barbiani D, Camerone E, Benedetti F. What is the relative contribution of biological and psychosocial factors to the generation of hypoxia headache? Canadian Journal of Pain 2018; 2:160-168. [PMID: 35005376 PMCID: PMC8730614 DOI: 10.1080/24740527.2018.1478224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Diletta Barbiani
- Neuroscience Department, University of Turin Medical School , Turin, Italy
- Plateau Rosà Laboratories , Plateau Rosà, Italy/Switzerland
| | - Eleonora Camerone
- Neuroscience Department, University of Turin Medical School , Turin, Italy
- Plateau Rosà Laboratories , Plateau Rosà, Italy/Switzerland
- Institute of Psychiatry, Psychology & Neuroscience, King’s College , London, UK
| | - Fabrizio Benedetti
- Neuroscience Department, University of Turin Medical School , Turin, Italy
- Plateau Rosà Laboratories , Plateau Rosà, Italy/Switzerland
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Abstract
A crucial question in placebo research is related to which conditions and physiological functions are affected by placebos. Here we present evidence that critical life functions, like ventilation, oxygenation, circulation, and perfusion, can be sensitive to placebo treatments in some circumstances. Indeed, we have investigated the role of placebo effects at an altitude of 3500m, where oxygen pressure is 64% compared to the sea level. In these extreme conditions, hypoxia triggers several compensatory responses, such as hyperventilation, increased cardiac output, and increased brain perfusion. A conditioned placebo procedure was found to mimic the effects of oxygen on these compensatory responses, and these effects are still present at altitudes as high as 4500 and 5500m, where oxygen pressure is only 57% and 50%, respectively, compared to the sea level. Thus, placebo effects also take place for those functions that are critical for life and whereby oxygen is the key element.
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Affiliation(s)
- Fabrizio Benedetti
- University of Turin Medical School, Turin, Italy; Plateau Rosà Laboratories, Plateau Rosà, Italy/Switzerland.
| | - Diletta Barbiani
- University of Turin Medical School, Turin, Italy; Plateau Rosà Laboratories, Plateau Rosà, Italy/Switzerland
| | - Eleonora Camerone
- Institute of Psychiatry, Psychology & Neuroscience, King's College, London, United Kingdom
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Frisaldi E, Carlino E, Zibetti M, Barbiani D, Dematteis F, Lanotte M, Lopiano L, Benedetti F. The placebo effect on bradykinesia in Parkinson's disease with and without prior drug conditioning. Mov Disord 2017; 32:1474-1478. [DOI: 10.1002/mds.27142] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 07/17/2017] [Accepted: 07/30/2017] [Indexed: 11/10/2022] Open
Affiliation(s)
- Elisa Frisaldi
- Department of Neuroscience; University of Turin Medical School; Turin Italy
| | - Elisa Carlino
- Department of Neuroscience; University of Turin Medical School; Turin Italy
| | - Maurizio Zibetti
- Department of Neuroscience; University of Turin Medical School; Turin Italy
| | - Diletta Barbiani
- Department of Neuroscience; University of Turin Medical School; Turin Italy
| | | | - Michele Lanotte
- Department of Neuroscience; University of Turin Medical School; Turin Italy
| | - Leonardo Lopiano
- Department of Neuroscience; University of Turin Medical School; Turin Italy
| | - Fabrizio Benedetti
- Department of Neuroscience; University of Turin Medical School; Turin Italy
- Plateau Rosa Laboratories, Breuil-Cervinia, Italy; Zermatt Switzerland
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