akinesia
Pronunciation: ay-ki-NEE-zee-ah
Complete absence or loss of voluntary movement, distinct from bradykinesia (slowness) or hypokinesia (reduced movement).
Full Definition
Akinesia refers to the complete absence or severe reduction of voluntary movement, often seen in advanced Parkinson's disease and other movement disorders. Unlike bradykinesia, which describes slowness of movement, akinesia represents a more severe impairment where patients may be unable to initiate movement altogether. This term is frequently used in clinical documentation of movement disorders and requires careful distinction from related motor symptoms. Editors should note that akinesia is sometimes used interchangeably with severe bradykinesia in clinical writing, though technically they represent different degrees of motor impairment.
Usage
Usage note: Often confused with bradykinesia in clinical writing; ensure the distinction between absent versus slow movement is clear.
In Context
- "The patient exhibited severe akinesia, remaining motionless despite verbal encouragement to move." — Clinical assessment note
- "Treatment with levodopa resulted in marked improvement of akinesia within 48 hours." — Discharge summary