Disorders of speech articulation caused by imperfect coordination of pharynx, larynx, tongue, or face muscles. This may result from $CRANIAL NERVE DISEASES$; NEUROMUSCULAR DISEASES; CEREBELLAR DISEASES; BASAL GANGLIA DISEASES; BRAIN STEM diseases; or diseases of the corticobulbar tracts (see PYRAMIDAL TRACTS). The cortical language centers are intact in this condition. (From Adams et al., Principles of Neurology, 6th ed, p489).
