Related Experiment Video
Updated: Feb 6, 2026

Functional and Physiological Methods of Evaluating Median Nerve Regeneration in the Rat
Published on: April 18, 2020
Deformation of the median nerve at different finger postures and wrist angles
Ping Yeap Loh1, Wen Liang Yeoh2, Hiroki Nakashima1
1Department of Human Science, Faculty of Design, Kyushu University, Fukuoka, Japan.
Background:
The objective of this study was to evaluate the changes of the median nerve cross-sectional area (MNCSA) and diameters of the median nerve at different finger postures and wrist angles.
Methods:
Twenty-five healthy male participants were recruited in this study. The median nerve at wrist crease was examined at six finger postures, and repeated with the wrist in 30° flexion, neutral (0°), and 30° extension. The six finger postures are relaxed, straight finger, hook, full fist, tabletop, and straight fist.
Results:
The main effects of both finger postures and wrist angles are significant (p < 0.05) on changes of the MNCSA. Different finger tendon gliding postures cause a change in the MNCSA. Furthermore, wrist flexion and extension cause higher deformation of the MNCSA at different finger postures.
Discussion:
The median nerve parameters such as MNCSA and diameter were altered by a change in wrist angle and finger posture. The results may help to understand the direct biomechanical stresses on the median nerve by different wrist-finger activities.
Related Concept Videos
Median
Sign Test for Median of Single Population
Plastic Deformations
Plastic Deformations
Contact Angle
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
Temperature Dependent Deformation

