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Postural Adjustments during Interactions with an Active Partner
- Source :
- Neuroscience. 463
- Publication Year :
- 2021
-
Abstract
- Ensuring stability of the human vertical posture is a complex task requiring both anticipatory and compensatory postural strategies when a standing person performs fast actions and interacts with the environment, which can include other persons. How people adjust their preparatory and compensatory postural adjustments in situations when they interact with an active partner is still poorly understood. In this study we investigated the postural adjustments while two healthy persons played a traditional childhood game. While standing facing each other, they were asked to push with their hands against the hands of the opponent only, and to make the opponent to take a step. We explored strategies when pushing the opponent’s hands generated perturbations to the posture of both players and when one of the players withdrew the arms to neutralize the opponent’s pushing action. Electromyograms were recorded from the leg and trunk muscles and used to quantify early (EPAs), anticipatory (APAs) and compensatory (CPAs) postural adjustments, as well as the co-activation and reciprocal changes in the activity of agonist–antagonist pairs. Results showed higher indices of muscle co-activation during EPAs during the game compared to the control conditions. We found that postural preparation strategies defined whether a participant kept or lost balance during the game. Our results highlight the importance of muscle co-activation, the role of anticipation, and the difference in strategies while interacting with an active partner as compared to interactions with passive objects.
- Subjects :
- 0301 basic medicine
medicine.medical_specialty
Posture
feed-forward control
Anticipatory postural adjustments
Task (project management)
03 medical and health sciences
0302 clinical medicine
Physical medicine and rehabilitation
medicine
Humans
uncertainty
Muscle, Skeletal
Postural Balance
Balance (ability)
Electromyography
General Neuroscience
compensatory postural adjustments
early postural adjustments
Anticipation
030104 developmental biology
Action (philosophy)
Arm
Trunk muscle
Psychology
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 18737544
- Volume :
- 463
- Database :
- OpenAIRE
- Journal :
- Neuroscience
- Accession number :
- edsair.doi.dedup.....19a8bc99e93b795e38c7cb4513b23896