Disuse atrophy of muscles

Introduction The limb needs long-term braking due to injury and other reasons, which inevitably leads to muscle atrophy , and the degree of muscle atrophy gradually increases with time. This has a serious impact on the rehabilitation of the patient's function after the injury. The cause is unclear, and it is caused by the inhibition of the lower N-type lesions, but it may be closely related to the long-term non-motion of the muscles. It is the physiological, biochemical, morphological and functional changes of the limbs under braking, fixation and weightlessness. It is manifested by the transition of muscle fibers from slow (type 1) to rapid (type 2) and weakened muscle protein anabolism. Increased catabolism, loss of muscle protein, reduction in muscle mass, reduction in cross-sectional area of muscle fibers, decrease in capillary capacity, and reduction in blood supply.

Cause

The limb needs long-term braking due to injury and other reasons, which inevitably leads to muscle atrophy , and the degree of muscle atrophy gradually increases with time. This has a serious impact on the rehabilitation of the patient's function after the injury. The cause is unclear, and it is caused by the inhibition of the lower N-type lesions, but it may be closely related to the long-term non-motion of the muscles.

an examination

Related inspection

Muscle tone examination electromyogram

First, electromyography (EMG).

Second, nerve conduction velocity (NCV), including motor nerve conduction velocity (MCV), sensory nerve conduction velocity (SCV), F wave, H reflection.

3. Evoked potentials (EP), including brainstem auditory evoked potentials (BAEP), visual evoked potentials (VEP), and upper and lower limb somatosensory induction (SEP).

Differential diagnosis

Differential diagnosis of muscle atrophy:

1. Thigh muscle atrophy: thigh muscle atrophy in patients with femoral head necrosis is a common phenomenon, muscle atrophy varies in severity, most femoral head necrosis patients can recover from thigh muscle atrophy, but a few femoral head necrosis patients thigh muscle atrophy Life can not be restored, seriously affecting the walking distance of patients and the quality of life of patients. 100% of patients with advanced femoral head necrosis have varying degrees of thigh muscle atrophy in the affected limbs. The impact on the walking of patients with femoral head necrosis is very large, which directly limits the recovery of the thigh of the affected limb and limits the length of walking of the patient.

2. Calf muscle atrophy: refers to calf muscle atrophy refers to dystrophic muscle dystrophy, muscle volume is smaller than normal, muscle fibers become thinner or even disappear.

3. Hand muscle atrophy: a type of muscle atrophy. Muscle atrophy refers to the reduction of muscle volume caused by dystrophic dystrophy, muscle fiber thinning or even disappearance.

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