Apraxia Associated With Superficial Siderosis in Cerebral Amyloid Angiopathy.

disorder of voluntary movement defined as the inability to make coordinated gestures directed toward a specific position, but with unchanged will and preserved primary sensory and motor abilities. Three different apraxia subtypes have been described: ideo-motor, ideational, and limb-kinetic. 1 Task-specific apraxia has also been described, which includes speech apraxia, gait apraxia, and apraxia of eyelid opening. 2 Apraxia of speech is usually characterized by changes in the quality of speech such as prosody, 3 rather than the sound distortions due to ‘articulatory groping’ in the phonetic variant. 2 All lesions that affect the gray and white matter of the brain can induce apraxia, and include corticobasal syndrome (CBS), multiple sclerosis, stroke, Creutzfeldt-Jacob disease, Huntington’s disease