Effectuation of adaptive stability and postural alignment strategies are decreased by alcohol intoxication |
| |
| Affiliation: | 1. Intensive Care Unit, Besançon University Hospital, F-25030, Besançon, France;2. Clinical Methodology Center, Besançon University Hospital, F-25030, Besançon, France;3. Research Unit EA3920 and SFR FED 4234, University of Franche Comté, Besançon, France;4. Australian and New Zealand Intensive Care Research Centre, Department of Epidemiology and Preventive Medicine, Monash University, Clayton, Australia;1. Department of Health, Kinesiology and Recreation, University of Utah, United States;2. Applied Cognition and Cognitive Engineering (AC2E) Research Group, School of Human and Health Sciences, University of Huddersfield, United Kingdom;1. Laboratory of Functional Evaluation and Human Motor Performance (LAFUP) – UNOPAR, Professional Master''s in Physical Exercise in Health Promotion, 675 Paris Ave., CEP 86041-120, Londrina, PR, Brazil;2. Department of Physical Therapy, Florida International University (FIU), Physical Therapy & Neuroscience Departments, 17 Wertheims'' Colleges of Nursing and Health Sciences & Medicine, 11200 SW 8th St., AHC3-18 430, Miami, FL, USA;3. Department of Physical Education. Universidade Estadual de Londrina, (UEL) Rodovia Celso Garcia Cid, Km 380, s/n15, Campus Universitário, Londrina, PR, 86057-970, Brazil;4. Physical Therapy Master''s Program, Universidade Cidade de São Paulo (UNICID), R. Cesário Galero, 448/475 - Tatuapé, São Paulo, SP, 03071-000, Brazil;5. Département des Sciences de la Santé, Programme de physiothérapie de l''Université McGill offert en extension à l’Université du Québec à Chicoutimi (UQAC), Centre de recherche Intersectoriel en santé durable - UQAC, Laboratoire de recherche BioNR - UQAC, Saguenay, Québec, Canada;1. Department of Kinesiology, Iowa State University, Ames, IA, USA;2. School of Kinesiology, Louisiana State University, Baton Rouge, LA, USA;3. Department of Biomedical Engineering, National Taiwan University, Taiwan |
| |
| Abstract: | Human stability control is a complex process comprising contributions from several partly independent mechanisms such as coordination, feedback and feed-forward control, and adaptation. Acute alcohol intoxication impairs these functions and is recognized as a major contributor to fall traumas. The study aimed to investigate how alcohol intoxication at .06% and .10% blood alcohol concentration (BAC) affected the movement spans and control of posture alignment. The angular positions of the head, shoulder, hip and knees relative to the ankles were measured with a 3D motion analysis system in 25 healthy adults during standing with eyes open or closed and with or without vibratory balance perturbations.Alcohol intoxication significantly increased the movement spans of the head, shoulders, hip and knees in anteroposterior and lateral directions during quiet stance (p ⩽ .047 and p ⩽ .003) and balance perturbations (p < .001, both directions). Alcohol intoxication also decreased the ability to reduce the movement spans through adaptation in both anteroposterior (p ⩽ .011) and lateral (p ⩽ .004) directions. When sober and submitted to balance perturbations, the subjects aligned the head, shoulders, hip and knees more forward relative to the ankle joint (p < .001), hence adopting a more resilient posture increasing the safety margin for backward falls. Alcohol intoxication significantly delayed this forward realignment (p ⩽ .022). Alcohol intoxication did not cause any significant posture realignment in the lateral direction. Thus, initiation of adaptive posture realignments to alcohol or other disruptions might be context dependent and associated with reaching a certain level of stability threats. |
| |
| Keywords: | Acute alcohol intoxication Posture alignment Postural control Vision Adaptation |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
