COMPONENTS OF MOTOR SYSTEM

EXAMPLES OF ISOLATED INVOLVEMENT

Muscle

Myopathy

Neuromuscular junction

Myasthenia gravis

Peripheral and cranial nerve

Neuropathy

Ventral root

Polyradiculopathy, motor type

Anterior horn cell and cranial nerve motor neuron

Poliomyelitis, amyotrophic lateral sclerosis

Pyramidal system

Primary lateral sclerosis

Extrapyramidal

      Cerebellum

      Reticular

      Basal ganglia

Alcoholic degeneration

Decerebrate rigidity

Parkinsonism, Huntington's, chorea, ballism