Related Experiment Videos
Characteristics of visual feedback in postural control during standing
Y Fukuoka1, K Tanaka, A Ishida
1Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Japan.
IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
|December 28, 1999
Summary
The visual feedback system has a significant time delay, indicating it cannot independently maintain upright posture. This study investigated visual feedback
Area of Science:
- Biomedical Engineering
- Neuroscience
- Human Motor Control
Background:
- Postural control relies on integrating multiple sensory inputs, including visual, vestibular, and proprioceptive feedback.
- Understanding the specific contribution of each sensory system is crucial for diagnosing and treating balance disorders.
Purpose of the Study:
- To investigate the role and characteristics of the visual feedback system in maintaining upright posture.
- To quantify the time delay associated with visual feedback in postural control.
Main Methods:
- Subjects stood on a force-measuring plate with vestibular and proprioceptive feedback suppressed.
- Participants controlled a computer model simulating body dynamics, with visual feedback of sway angle provided.
- Frequency response functions were calculated for ankle moment relative to sway angle.
Main Results:
- The visual feedback system exhibited a substantial time delay.
- This delay limits the visual system's ability to independently stabilize posture.
Conclusions:
- Visual sensory feedback alone is insufficient for maintaining upright posture due to inherent time delays.
- Future research should explore the synergistic interplay of visual feedback with other sensory systems for effective postural control.