Causes of muscle atrophy:
Muscle atrophy refers to rhabdomyodystrophy, muscle volume is smaller than that of normal people, and muscle fibers become thinner or even disappear. Hypertrophy of neuromuscular diseases. The nutritional status of muscle is closely related to the nervous system besides the pathological changes of muscle tissue itself. Spinal cord diseases often lead to muscular dystrophy and muscular atrophy.
Classification of muscular atrophy
1. Classification according to pathogenesis
(1) Muscle atrophy caused by general malnutrition, disuse and endocrine abnormality.
(2) Muscle atrophy caused by heredity, poisoning, abnormal metabolism, infection and allergic reaction. This classification is of little clinical significance, because the cause is difficult to be clear at the moment.
2. According to the distribution of muscle atrophy:
(1) diffuse muscular atrophy; (2) Muscle atrophy of head and face;
(3) Muscle atrophy of head and upper limbs or proximal limbs; (4) Muscle atrophy at the distal end of upper and lower limbs;
(5) localized muscular atrophy
3. According to the classification of primary lesions leading to muscle atrophy.
(1) Neurogenic muscular atrophy (2) Myogenic muscular atrophy (3) Abandoned muscular atrophy. Neurogenic muscular atrophy mainly refers to the pathological changes of motor neurons such as spinal cord anterior horn cells and peripheral nerves, and belongs to primary neurogenic muscular atrophy. These three factors are interrelated. Although muscle atrophy also appears in upper motor neuron disease, some people classify it as late secondary and disuse atrophy. Myogenic muscular atrophy refers to the pathological changes of muscle itself. Disuse muscular atrophy can still lead to systemic wasting disease.