ideomotor apraxia
Pronunciation: ID-ee-oh-mo-tor ah-PRAX-ee-ah
Inability to perform learned movements on command despite intact motor function and comprehension.
Full Definition
Ideomotor apraxia is a neurological disorder characterized by the inability to perform learned, skilled movements on verbal command or imitation, despite having intact motor strength, sensation, and comprehension. Patients understand what is requested but cannot execute the appropriate movement sequence, often producing awkward, clumsy approximations. This condition typically results from lesions in the left parietal lobe, particularly the supramarginal and angular gyri, or disconnection between these areas and motor regions. Testing involves asking patients to demonstrate the use of common objects (brushing teeth, hammering) without the actual objects present. Ideomotor apraxia significantly impacts activities of daily living.
Usage
Usage note: Distinguish from ideational apraxia by testing single gestures versus complex multi-step sequences.
In Context
- "Ideomotor apraxia was evident when the patient could not demonstrate combing hair on command." — Praxis examination findings
- "Left parietal lesion caused severe ideomotor apraxia affecting bilateral limb movements." — Stroke assessment documentation