Clinical Manifestations of Median Nerve Injury
Jul 20, 2021
Source: Cainiu Health
Dr. Li Chenyu
Introduction
Median Nerve Injury Manifestations:
Acute injuries—such as lacerations or fractures—can impair overall hand function, affecting grip strength, pinch strength, and sensory perception in the hand.
Chronic injury most commonly presents as carpal tunnel syndrome. Early symptoms include numbness and paresthesia (e.g., tingling or “pins-and-needles”) in the radial three-and-a-half fingers. Symptoms typically worsen at night and are most pronounced upon waking in the morning; massage or compression of the hand and wrist often provides symptomatic relief.
The median nerve lies relatively superficially at the wrist and left joint, making it susceptible to injury. However, acute or chronic injuries to the median nerve at different locations result in distinct sensory and motor deficits.
Acute injuries—such as lacerations or fractures—can impair overall hand function, affecting grip strength, pinch strength, and sensory perception in the hand.
Chronic injury most commonly manifests as carpal tunnel syndrome. Early symptoms include numbness and paresthesia in the radial three-and-a-half fingers, typically worsening at night and being most pronounced upon waking. Symptoms may be alleviated by massage or compression of the hand and wrist. In long-standing cases, thenar muscle atrophy and weakness develop.
