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Le-Bert CR, Bukoski A, Downs J, Hodgson DS, Thombs L, Ridgway SH, Bailey J. Apneustic anesthesia ventilation improves pulmonary function in anesthetized bottlenose dolphins ( Tursiops truncatus). Front Vet Sci 2024; 11:1287478. [PMID: 38645641 PMCID: PMC11027569 DOI: 10.3389/fvets.2024.1287478] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 03/12/2024] [Indexed: 04/23/2024] Open
Abstract
Introduction Use of mechanical ventilation during general anesthesia is a necessary practice in the anesthetization of small cetaceans as spontaneous ventilation fails to provide adequate gas exchange. Currently available methods of ventilation do not account for the intermittent breathing strategy of representative species within this infraorder of fully aquatic mammals and may have a significant effect on cardiac and respiratory physiology. Methods To understand the impact of mechanical ventilation on cardiopulmonary function in one small species of cetacean, the bottlenose dolphin (Tursiops truncatus), we compared controlled mechanical ventilation (CMV) to a novel ventilation method known as apneustic anesthesia ventilation (AAV). AAV simulates the normal inspiratory breath-hold pattern of dolphins. Ten anesthetic procedures (dental procedure, n = 9; bronchoscopy, n = 2) were performed on nine dolphins (age range: 10-42 years; mean = 32 years; median = 37 years; female = 3, 40%; male = 6, 60%). In a cross-over study design, dolphins were instrumented and randomly assigned to AAV or CMV as the initial mode of ventilation, then switched to the alternate mode. Baseline cardiopulmonary data were collected and again after 30 min on each mode of ventilation. Cardiac index, stroke volume index, systemic vascular resistance, alveolar dead space, alveolar-arterial oxygen tension gradient, arterial oxygen content, oxygen delivery index, and dynamic respiratory system compliance index were calculated at each of the four time points. Results During AAV, dolphins had higher arterial oxygen tension, higher mean airway pressure, reduced alveolar dead space ventilation and lower alveolar-arterial oxygen difference. Cardiovascular performance was not statistically different between the two modes. Discussion Our study suggests AAV, which more closely resembles the conscious intermittent respiratory pattern phenotype of dolphins, improves ventilation and pulmonary function in the anesthetized dolphin. Future studies should evaluate the cardiopulmonary effects of neutral buoyancy and cardiopulmonary sparing drug protocols to reduce the need for hemodynamic support of current protocols.
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Affiliation(s)
- Carolina R. Le-Bert
- U.S. Navy Marine Mammal Program, Naval Information Warfare Center Pacific, San Diego, CA, United States
| | - Alex Bukoski
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
| | - John Downs
- Department of Anesthesiology, College of Medicine, University of Florida, Gainesville, FL, United States
- Innovative Veterinary Medicine, Ponte Vedra, FL, United States
| | - David S. Hodgson
- Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS, United States
| | - Lori Thombs
- Department of Statistics, College of Arts and Science, University of Missouri, Columbia, MO, United States
| | - Sam H. Ridgway
- U.S. Navy Marine Mammal Program, National Marine Mammal Foundation, San Diego, CA, United States
| | - James Bailey
- Innovative Veterinary Medicine, Ponte Vedra, FL, United States
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Fisher K, Dodam J, Bailey J, Thombs L, Hodgson D, Bukoski A. Arterial blood gas tensions during recovery in horses anesthetized with apneustic anesthesia ventilation compared with conventional mechanical ventilation. Vet Anaesth Analg 2023; 50:238-244. [PMID: 36781322 DOI: 10.1016/j.vaa.2023.01.004] [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: 10/17/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/30/2023]
Abstract
OBJECTIVE To compare PaO2 and PaCO2 in horses recovering from general anesthesia maintained with either apneustic anesthesia ventilation (AAV) or conventional mechanical ventilation (CMV). STUDY DESIGN Randomized, crossover design. ANIMALS A total of 10 healthy adult horses from a university-owned herd. METHODS Dorsally recumbent horses were anesthetized with isoflurane in oxygen [inspired oxygen fraction = 0.3 initially, with subsequent titration to maintain PaO2 ≥ 85 mmHg (11.3 kPa)] and ventilated with AAV or CMV according to predefined criteria [10 mL kg-1 tidal volume, PaCO2 40-45 mmHg (5.3-6.0 kPa) during CMV and < 60 mmHg (8.0 kPa) during AAV]. Horses were weaned from ventilation using a predefined protocol and transferred to a stall for unassisted recovery. Arterial blood samples were collected and analyzed at predefined time points. Tracheal oxygen insufflation at 15 L minute-1 was provided if PaO2 < 60 mmHg (8.0 kPa) on any analysis. Time to oxygen insufflation, first movement, sternal recumbency and standing were recorded. Data were analyzed using repeated measures anova, paired t tests and Fisher's exact test with significance defined as p < 0.05. RESULTS Data from 10 horses were analyzed. Between modes, PaO2 was significantly higher immediately after weaning from ventilation and lower at sternal recumbency for AAV than for CMV. No PaCO2 differences were noted between ventilation modes. All horses ventilated with CMV required supplemental oxygen, whereas three horses ventilated with AAV did not. Time to first movement was shorter with AAV. Time to oxygen insufflation was not different between ventilation modes. CONCLUSIONS Although horses ventilated with AAV entered the recovery period with higher PaO2, this advantage was not sustained during recovery. Whereas fewer horses required supplemental oxygen after AAV, the use of AAV does not preclude the need for routine supplemental oxygen administration in horses recovering from general anesthesia.
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Affiliation(s)
- Kelsey Fisher
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA
| | - John Dodam
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA
| | - James Bailey
- Innovative Veterinary Medicine, Ponte Vedra, FL, USA
| | - Lori Thombs
- Department of Statistics, College of Arts and Science, University of Missouri, Columbia, MO, USA
| | - David Hodgson
- Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - Alex Bukoski
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA.
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Marquis CR, Gull T, Dodam J, Thombs L, Bukoski A. Comparison of four endotracheal tube cleaning protocols in anesthetized dogs. J Am Vet Med Assoc 2023; 261:336-341. [PMID: 36595367 DOI: 10.2460/javma.22.10.0446] [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] [Indexed: 01/04/2023]
Abstract
OBJECTIVE To compare the efficacy of 4 cleaning protocols applied to endotracheal tubes (ETTs) collected from anesthetized dogs. SAMPLE 100 ETTs (25 per protocol). PROCEDURES A 10-question survey designed to determine ETT reuse and cleaning practices was distributed via email to a sample of veterinary anesthesiologists. Informed by survey results, 4 ETT cleaning protocols were selected for use in a prospective clinical study. Dogs were intubated with sterile polyvinyl chloride ETTs. At extubation, each ETT was cultured for bacterial growth, randomly assigned to 1 of 4 protocols [water scrub (P1), detergent scrub (P2), detergent scrub and chlorhexidine gluconate (CHG) soak (P3), or detergent scrub and bleach soak (P4)], and cultured again after drying. Bacterial genera were identified using mass spectrometry and 16s rRNA sequencing. Proportions of ETTs exhibiting no post-cleaning growth were compared between protocols using the Fisher exact test with Bonferroni correction. RESULTS Half of survey respondents that reused ETTs did not sterilize them before reuse, cleaning methods varied widely, and no reported methods were evidence-based. After use, the number of ETTs exhibiting no post-cleaning bacterial growth were 15/25 (60%), 14/25 (56%), 20/25 (80%), and 17/25 (68%) for protocols P1, P2, P3, and P4, respectively. Pairwise comparisons did not reveal any statistically significant differences between protocols. CLINICAL RELEVANCE In small animal patients, some veterinary anesthesiologists reuse ETTs without sterilization and cleaning protocols vary widely. No differences between the studied protocols were identified. Further research is necessary to identify a safe, efficacious ETT cleaning protocol for use in small animal practice.
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Affiliation(s)
- Charlotte R Marquis
- 1Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO
| | - Tamara Gull
- 2Veterinary Medical Diagnostic Laboratory, College of Veterinary Medicine, University of Missouri, Columbia, MO
| | - John Dodam
- 1Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO
| | - Lori Thombs
- 3Department of Statistics, College of Arts and Sciences, University of Missouri, Columbia, MO
| | - Alex Bukoski
- 1Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO
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Bukoski A, Hodgson D, Downs J, LeBert C, Thombs L, Bailey J. An implementation of apneustic anesthesia ventilation in the horse: comparison with conventional mechanical ventilation. Vet Anaesth Analg 2022; 49:372-381. [DOI: 10.1016/j.vaa.2022.04.002] [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] [Received: 09/07/2021] [Revised: 04/06/2022] [Accepted: 04/07/2022] [Indexed: 11/26/2022]
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Reed SK, Kramer J, Thombs L, Pitts JB, Wilson DA, Keegan KG. Comparison of results for body-mounted inertial sensor assessment with final lameness determination in 1,224 equids. J Am Vet Med Assoc 2020; 256:590-599. [DOI: 10.2460/javma.256.5.590] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Welby L, Ukatu CC, Thombs L, Lever TE. A Mouse Model of Dysphagia After Facial Nerve Injury. Laryngoscope 2020; 131:17-24. [PMID: 32096879 DOI: 10.1002/lary.28560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 04/25/2019] [Revised: 12/27/2019] [Accepted: 01/21/2020] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Dysphagia is common following facial nerve injury; however, research is sparse regarding swallowing-related outcomes and targeted treatments. Previous animal studies have used eye blink and vibrissae movement as measures of facial nerve impairment and recovery. The purpose of this study was to create a mouse model of facial nerve injury that results in dysphagia to enhance translational research outcomes. STUDY DESIGN Prospective animal study. METHODS Twenty C57BL/6J mice underwent surgical transection of the main trunk (MT) (n = 10) or marginal mandibular branch (MMB) (n = 10) of the left facial nerve. Videofluoroscopic swallow study (VFSS) assays for drinking and eating were performed at baseline and 14 days postsurgery to quantify several deglutition-related outcome measures. RESULTS VFSS analysis revealed that MT transection resulted in significantly slower lick and swallow rates during drinking (P ≤ .05) and significantly slower swallow rates and longer inter-swallow intervals during eating (P ≤ .05), congruent with oral and pharyngeal dysphagia. After MMB transection, these same VFSS metrics were not statistically significant (P > .05). CONCLUSION The main finding of this study was that transection of the facial nerve MT leads to oral and pharyngeal stage dysphagia in mice; MMB transection does not. These results from mice provide novel insight into specific VFSS metrics that may be used to characterize dysphagia in humans following facial nerve injury. We are currently using this surgical mouse model to explore promising treatment modalities such as electrical stimulation to hasten recovery and improve outcomes following various iatrogenic and idiopathic conditions affecting the facial nerve. LEVEL OF EVIDENCE NA Laryngoscope, 131:17-24, 2021.
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Affiliation(s)
- Lauren Welby
- Otolaryngology-Head and Neck Surgery, University of Missouri, Columbia, Missouri, U.S.A
| | - Ceisha C Ukatu
- Otolaryngology-Head and Neck Surgery, University of Missouri, Columbia, Missouri, U.S.A
| | - Lori Thombs
- Statistics, University of Missouri, Columbia, Missouri, U.S.A
| | - Teresa E Lever
- Otolaryngology-Head and Neck Surgery, University of Missouri, Columbia, Missouri, U.S.A
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Pitts JB, Kramer J, Reed SK, Schiltz P, Thombs L, Keegan KG. Effect of induced hindlimb length difference on body-mounted inertial sensor measures used to evaluate hindlimb lameness in horses. PLoS One 2020; 15:e0228872. [PMID: 32069321 PMCID: PMC7028285 DOI: 10.1371/journal.pone.0228872] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 01/25/2020] [Indexed: 11/30/2022] Open
Abstract
This study has investigated the immediate effect of induced hindlimb length difference on hindlimb lameness measured as differences in minimum (Pmin) and maximum (Pmax) pelvic heights in 16 horses trotting in a straight line and lungeing on both hard and soft surfaces with body-mounted inertial sensors. Hindlimb length differences were induced by applying an Easyboot Glue-on shoe to one hindlimb. Changes in Pmin and Pmax with induced hindlimb length difference were assessed with a two-way repeated-measures ANOVA with trial (straight, lunge with inside limb elevation, lunge with outside limb elevation) and surface (hard, soft) as within-subject factors. Change in Pmin, indicating an impact-type lameness, in the hind limb with the elevation, was significant in both the straight line and while lunging on both hard and soft surfaces. Change in Pmax, indicating pushoff-type lameness, in the opposite, non-elevated hind limb, was significant when trotting in a straight line but not while lunging.
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Affiliation(s)
- Jael B. Pitts
- Veterinary Health Center, Department of Veterinary Medicine and Surgery, Equine Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, United States of America
- * E-mail:
| | - Joanne Kramer
- Veterinary Health Center, Department of Veterinary Medicine and Surgery, Equine Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, United States of America
| | - Shannon K. Reed
- Veterinary Health Center, Department of Veterinary Medicine and Surgery, Equine Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, United States of America
| | - Paul Schiltz
- Equestrian Studies, William Woods University, Fulton, Missouri, United States of America
| | - Lori Thombs
- Social Science Statistics Center, Department of Statistics, University of Missouri, Columbia, Missouri, United States of America
| | - Kevin G. Keegan
- Veterinary Health Center, Department of Veterinary Medicine and Surgery, Equine Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, United States of America
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Haney MM, Sinnott J, Osman KL, Deninger I, Andel E, Caywood V, Mok A, Ballenger B, Cummings K, Thombs L, Lever TE. Mice Lacking Brain-Derived Serotonin Have Altered Swallowing Function. Otolaryngol Head Neck Surg 2019; 161:468-471. [PMID: 31035861 DOI: 10.1177/0194599819846109] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 12/14/2022]
Abstract
The intricate sensorimotor neural circuits that control swallowing are heavily reliant on serotonin (5-hydroxytryptamine [5-HT]); however, the impact of 5-HT deficiency on swallow function remains largely unexplored. We investigated this using mice deficient in tryptophan-hydroxylase-2 (TPH2), the enzyme catalyzing the rate-limiting step in 5-HT synthesis. Videofluoroscopy was utilized to characterize the swallowing function of TPH2 knockout (TPH2-/-) mice as compared with littermate controls (TPH2+/+). Results showed that 5-HT deficiency altered all 3 stages of swallowing. As compared with controls, TPH2-/- mice had significantly slower lick and swallow rates and faster esophageal transit times. Future studies with this model are necessary to determine if 5-HT replacement may rescue abnormal swallowing function. If so, supplemental 5-HT therapy may have vast applications for a large population of patients with a variety of neurologic disorders resulting in life-diminishing dysphagia, particularly amyotrophic lateral sclerosis and Parkinson's disease, for which 5-HT deficiency is implicated in the disease pathogenesis.
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Affiliation(s)
- Megan M Haney
- 1 Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA
| | - Joseph Sinnott
- 2 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Kate L Osman
- 2 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Ian Deninger
- 2 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Ellyn Andel
- 2 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Victoria Caywood
- 2 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Alexis Mok
- 2 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Brayton Ballenger
- 2 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Kevin Cummings
- 3 Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA
| | - Lori Thombs
- 4 Department of Statistics, College of Arts and Sciences, University of Missouri, Columbia, Missouri, USA
| | - Teresa E Lever
- 2 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA.,3 Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA
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Secher JO, Ceylan A, Mazzoni G, Mashayekhi K, Li T, Muenthaisong S, Nielsen TT, Li D, Li S, Petkov S, Cirera S, Luo Y, Thombs L, Kadarmideen HN, Dinnyes A, Bolund L, Roelen BAJ, Schmidt M, Callesen H, Hyttel P, Freude KK. Systematic in vitro and in vivo characterization of Leukemia-inhibiting factor- and Fibroblast growth factor-derived porcine induced pluripotent stem cells. Mol Reprod Dev 2017; 84:229-245. [PMID: 28044390 PMCID: PMC6221014 DOI: 10.1002/mrd.22771] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Accepted: 12/16/2016] [Indexed: 12/14/2022]
Abstract
Derivation and stable maintenance of porcine induced pluripotent stem cells (piPSCs) is challenging. We herein systematically analyzed two piPSC lines, derived by lentiviral transduction and cultured under either leukemia inhibitory factor (LIF) or fibroblast growth factor (FGF) conditions, to shed more light on the underlying biological mechanisms of porcine pluripotency. LIF‐derived piPSCs were more successful than their FGF‐derived counterparts in the generation of in vitro chimeras and in teratoma formation. When LIF piPSCs chimeras were transferred into surrogate sows and allowed to develop, only their prescence within the embryonic membranes could be detected. Whole‐transcriptome analysis of the piPSCs and porcine neonatal fibroblasts showed that they clustered together, but apart from the two pluripotent cell populations of early porcine embryos, indicating incomplete reprogramming. Indeed, bioinformatic analysis of the pluripotency‐related gene network of the LIF‐ versus FGF‐derived piPSCs revealed that ZFP42 (REX1) expression was absent in both piPSC‐like cells, whereas it was expressed in the porcine inner cell mass at Day 7/8. A second striking difference was the expression of ATOH1 in piPSC‐like cells, which was absent in the inner cell mass. Moreover, our gene expression analyses plus correlation analyses of known pluripotency genes identified unique relationships between pluripotency genes in the inner cell mass, which are to some extent, in the piPSC‐like cells. This deficiency in downstream gene activation and divergent gene expression may be underlie the inability to derive germ line‐transmitting piPSCs, and provides unique insight into which genes are necessary to achieve fully reprogrammed piPSCs. 84: 229–245, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Jan O Secher
- Veterinary Reproduction and Obstetrics, Faculty of Health and Medical Sciences, Department of Large Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Ahmet Ceylan
- Faculty of Veterinary Medicine Ankara University, Department of Histology and Embryology, Diskapi, Ankara, Turkey
| | - Gianluca Mazzoni
- Animal Breeding, Quantitative Genetics and Systems Biology Group, Faculty of Health and Medical Sciences, Department of Large Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Kaveh Mashayekhi
- Faculty of Health and Medical Sciences, Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark.,BioTalentum Ltd., Gödöllő, Hungary.,Faculty of Veterinary Medicine, Departments of Equine Sciences and Farm Animal Health, Utrecht University, Utrecht, Netherlands
| | - Tong Li
- Faculty of Health and Medical Sciences, Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark.,BioTalentum Ltd., Gödöllő, Hungary.,Faculty of Veterinary Medicine, Departments of Equine Sciences and Farm Animal Health, Utrecht University, Utrecht, Netherlands
| | - Suchitra Muenthaisong
- BioTalentum Ltd., Gödöllő, Hungary.,Faculty of Veterinary Medicine, Department of Farm Animal Health, Utrecht University, Utrecht, Netherlands
| | - Troels T Nielsen
- Danish Dementia Research Centre, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Dong Li
- Faculty of Health and Medical Sciences, Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Shengting Li
- Department of Biomedicine, Aarhus University, Aarhus C, Denmark
| | - Stoyan Petkov
- Institute for Farm Animal Genetics (FLI), Neustadt, Germany
| | - Susanna Cirera
- Faculty of Health and Medical Sciences, Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Yonglun Luo
- Department of Biomedicine, Aarhus University, Aarhus C, Denmark
| | - Lori Thombs
- Department of Statistics, University of Missouri, Columbia, Missouri
| | - Haja N Kadarmideen
- Animal Breeding, Quantitative Genetics and Systems Biology Group, Faculty of Health and Medical Sciences, Department of Large Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Andras Dinnyes
- BioTalentum Ltd., Gödöllő, Hungary.,Faculty of Veterinary Medicine, Departments of Equine Sciences and Farm Animal Health, Utrecht University, Utrecht, Netherlands.,Molecular Animal Biotechnology Laboratory, Szent István University, Gödöllő, Hungary
| | - Lars Bolund
- Department of Biomedicine, Aarhus University, Aarhus C, Denmark
| | - Bernard A J Roelen
- Faculty of Veterinary Medicine, Department of Farm Animal Health, Utrecht University, Utrecht, Netherlands
| | - Mette Schmidt
- Veterinary Reproduction and Obstetrics, Faculty of Health and Medical Sciences, Department of Large Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Henrik Callesen
- Department of Animal Science, Aarhus University, Tjele, Denmark
| | - Poul Hyttel
- Faculty of Health and Medical Sciences, Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Kristine K Freude
- Faculty of Health and Medical Sciences, Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark
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McClenaghan BA, Williams H, Dickerson J, Thombs L. Spectral signature of forces to discriminate perturbations in standing posture. Clin Biomech (Bristol, Avon) 1994; 9:21-7. [PMID: 23916074 DOI: 10.1016/0268-0033(94)90054-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [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: 04/23/1992] [Accepted: 12/16/1992] [Indexed: 02/07/2023]
Abstract
This study proposes a methodology for the collection and analysis of the spectral characteristics of human movement patterns. Specifically, the purpose of this study was to determine the reliability of the spectral signature obtained from postural forces and the usefulness of the technique in identifying perturbations in standing posture. Data collected included trials of the experimental protocol under normal standing conditions and under three experimental conditions designed to perturb stability. Results of this investigation indicated that spectral signatures created from ground forces using the methodology proposed in this study were highly reliable within individuals and across different testing sessions. These data further indicate that spectral signatures obtained from ground reaction forces during standing provide a sensitive indicator of an individual's postural stability.
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Abstract
This study investigated the effects of seat-surface inclination on parameters of postural stability and functional use of the upper extremity. 10 non-impaired children and 10 children with cerebral palsy, aged between four and 15 years, were studied. Seat-surface inclinations of 0 degree, 5 degrees anteriorly and 5 degrees posteriorly were used as the experimental conditions. Significant differences were observed on most dependent measures between the two groups. The results suggest that anteriorly tilting the seats of children with cerebral palsy may disturb postural stability, without improving performance of the upper extremity.
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Affiliation(s)
- B A McClenaghan
- Department of Exercise Science, University of South Carolina, Columbia 29208
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12
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Gardner LR, Thombs L, Edwards D, Nelson D. Time Series Analyses of Suspended Sediment Concentrations at North Inlet, South Carolina. ACTA ACUST UNITED AC 1989. [DOI: 10.2307/1351900] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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