Progressive spinal muscular atrophy

The progressive age of progressive spinal muscular atrophy is earlier than that of ALS. It is mostly around 30 years old. It is more common in men. Motor neuron degeneration is limited to anterior horn cells of the spinal cord. Damage symptoms and signs, onset of onset, the first symptoms are usually atrophy of small muscles in one or both hands, weakness, gradually involving the forearm, upper arm and scapular muscles, but also beginning from atrophy of the lower limbs, but rare, obvious distal atrophy, muscle tension and Reduced tendon reflexes, no sensory disturbance, unaffected sphincter function, survival time period of those with medulla oblongata involved in medulla oblongata, often die of lung infection.

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