Alien Hand Syndrome
A neurological condition where one hand performs purposeful movements without the patient's conscious control or awareness.
Full Definition
Alien hand syndrome is a rare neurological disorder where patients experience involuntary, purposeful movements of one hand that they cannot control and often do not recognize as their own. The affected hand may perform complex actions like grasping objects, touching the face, or even interfering with actions performed by the normal hand, all without the patient's intention or awareness. This condition typically results from damage to the corpus callosum, frontal lobe, or parietal lobe, often following stroke or surgery. There are several subtypes, including frontal alien hand (disinhibited, grasping behaviors) and callosal alien hand (intermanual conflict). The condition significantly impacts daily functioning and requires specialized rehabilitation strategies focused on environmental modifications and behavioral management techniques.
Usage
Usage note: Document specific behaviors and triggers; impacts safety and functional planning.
In Context
- "The patient's alien hand syndrome caused her left hand to repeatedly undo tasks completed by her right hand." — Neuropsychological evaluation
- "Alien hand syndrome following corpus callosotomy required behavioral strategies to minimize intermanual conflict." — Occupational therapy consultation