WAnterior corticospinal tract
WBasal ganglia
WBetz cell
WCerebellar degeneration
WCerebellum
WCorticobulbar tract
WCorticospinal tract
WExtrapyramidal system
WFacial nerve
WHypoglossal nerve
WLateral corticospinal tract
WMotor cortex
WMotor neuron
WOlivospinal tract
WPrimary motor cortex
WPyramidal tracts
WReticular formation
WRubrospinal tract
WSpinal cord
WSupplementary motor area
WSurvival of motor neuron
WTectospinal tract
WThalamus
WUpper motor neuron
WVestibulospinal tract