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)

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