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Related Experiment Video

Updated: Jun 15, 2026

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

Published on: August 30, 2016

How is precision regulated in maintaining trunk posture?

Nienke W Willigenburg¹, Idsart Kingma, Jaap H van Dieën

¹Faculty of Human Movement Sciences, Research Institute MOVE, VU University Amsterdam, Amsterdam, The Netherlands. n.willigenburg@fbw.vu.nl

Experimental Brain Research

|March 16, 2010

Summary

Increased precision in trunk postural control was directionally specific and did not rely on muscle stiffness. This suggests trunk posture precision is managed through feedback mechanisms, not co-activation.

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Last Updated: Jun 15, 2026

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

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Published on: August 30, 2016

Experimental Methods to Study Human Postural Control

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Published on: September 11, 2019

Movement Retraining using Real-time Feedback of Performance

Movement Retraining using Real-time Feedback of Performance

Published on: January 17, 2013

Area of Science:

Biomechanics
Motor Control
Human Movement Science

Background:

Limb control precision often involves increased joint stiffness via antagonistic co-activation.
It remains unclear if this strategy applies to trunk postural control.

Purpose of the Study:

To investigate if trunk postural control precision utilizes stiffness regulation through antagonistic co-activation.
To determine the directional specificity of trunk precision control.

Main Methods:

Thirteen subjects performed static postural tasks with varying precision demands in frontal and sagittal planes.
Trunk angles and electromyography (EMG) of abdominal and back muscles were recorded.
Repeated measures ANOVAs analyzed kinematic variability and muscle activity.

Main Results:

Decreased target size significantly reduced trunk angle variability in a direction-specific manner.
Precision demands did not consistently affect trunk muscle activity (EMG) over time.
Trunk postural control precision was found to be directionally specific.

Conclusions:

Stiffness regulation by antagonistic co-activation is not employed for increased trunk postural control precision.
Trunk angle precision appears to be managed via feedback control mechanisms.