Related Experiment Video
Updated: May 20, 2026
07:42
A Simple Non-invasive Method for Temporary Knockdown of Upper Limb Proprioception
Published on: March 3, 2018
Loss of large-diameter nerve sensory input changes perceived posture.
Nobuyuki Inui1, Junya Masumoto, Takaaki Beppu
1Laboratory of Human Motor Control, Naruto University of Education, Takashima, Naruto-cho, Naruto-shi 772-8502, Japan. inui@naruto-u.ac.jp
Experimental Brain Research
|July 24, 2012
Summary
Proprioception influences body perception. When wrist and elbow positions were manipulated during ischemic anesthesia, perceived limb posture shifted towards the opposite direction, indicating a recalibration of the body schema.
Area of Science:
- Neuroscience
- Human Physiology
- Body Perception
Background:
- Previous research demonstrated that ischemic anesthesia alters the perception of limb posture.
- Fully flexed or extended finger, wrist, and elbow were perceived as opposite postures during anesthesia.
Purpose of the Study:
- To investigate how perceived limb posture changes when the wrist and elbow are fixed in opposing positions during ischemic anesthesia.
- To understand the role of proprioceptive input in defining the body schema.
Main Methods:
- Ten healthy participants underwent ischemic block of the right upper arm.
- Participants' wrists and elbows were fixed in specific postures (full flexion/extension) before and during anesthesia.
- Perceived postures of the wrist and elbow were recorded.
Main Results:
- When the wrist was extended and elbow flexed, perceived wrist posture shifted to flexion and elbow to extension.
- When the wrist was flexed and elbow extended, perceived wrist posture shifted to extension and elbow to flexion.
- Perceived postures shifted independently following loss of afferent signals.
Conclusions:
- Limb posture perception is dynamically adjusted based on the balance of proprioceptive inputs.
- The body schema recalibrates in response to altered sensory information from limb position.
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