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Analysis of Light Grip Influence on Standing Posture.

Angélina Bellicha¹, Andrés Trujillo-León^2,3, Fabien Vérité¹

¹ISIR (Institute of Intelligent Systems and Robotics), UMR 7222 CNRS, Agathe Group INSERM U 1150, Sorbonne Université, 75005 Paris, France.

Sensors (Basel, Switzerland)

|December 28, 2021

Summary

Light grip (LG) of a stationary object enhances upright posture control by providing haptic sensory input. This study isolated the hand

Keywords:

force sensors healthcare light grip light touch postural control

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Experimental Methods to Study Human Postural Control

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Published on: September 11, 2019

Area of Science:

Biomechanics
Human sensorimotor control
Haptic perception

Background:

Upright posture control is crucial for daily living activities.
Sensory integration, including haptic feedback, is vital for maintaining balance.
Previous studies often limited the role of assistive devices like canes to force transmission.

Purpose of the Study:

To investigate the specific role of hand receptors in the light grip (LG) mechanism for postural control.
To isolate the contribution of haptic feedback from the hand in reducing postural sway.
To examine LG's effect on posture while standing in a natural, stable stance.

Main Methods:

Participants stood in a stable stance with a cane handle fixed to a stationary support.
Two conditions were tested: lightly gripping the handle and not gripping it.
Tactile information during light grip was captured using FSR sensors.
Spatial and frequency analyses were employed to assess postural sway.

Main Results:

Light grip of a stationary object significantly reduced postural sway compared to not gripping.
Haptic sensory input from the hand plays a crucial role in stabilizing upright posture.
The findings align with previous research but offer a novel perspective by isolating hand input.

Conclusions:

The hand's sensory receptors are critical components in the light grip mechanism for postural control.
Light grip provides a significant haptic advantage for maintaining balance.
This research highlights the importance of hand-mediated sensory feedback in sensorimotor strategies for posture.