What does akinesia mean?
Akinesia is a medical term denoting the loss or impairment of voluntary movement — literally, an absence of motion. In neurology, it is best known as a feature of advanced Parkinson's disease, where patients may freeze, unable to initiate steps or gestures despite intending to move. The word also has a distinct cardiac sense: cardiologists describe a segment of heart muscle as 'akinetic' when it fails to contract, often after a heart attack. Derived from the Greek kinēsis, meaning 'movement', akinesia sits at the extreme end of a spectrum of movement disorders that includes hypokinesia (reduced movement) and bradykinesia (slowed movement). It is a formal clinical term, appearing in medical literature, case reports, and specialist discussion rather than casual conversation. For readers interested in how language borrows from Greek to name precise states of the body, akinesia offers a striking example: the same root that produced 'cinema' and 'kinetic' here names motion's complete withdrawal.
nounThe loss or impairment of the ability to move one's muscles voluntarily; in medicine, a symptom characterized by an absence of spontaneous movement, most notably associated with advanced Parkinson's disease.
- In neurology and psychiatry: the loss or severe impairment of voluntary muscle movement, classically seen in advanced Parkinson's disease.
- In cardiology: the absence of contraction in a region of the heart muscle, typically observed on an echocardiogram after injury such as a myocardial infarction.
"As the patient's Parkinson's disease progressed, episodes of akinesia left him momentarily frozen mid-step."
"Advanced Parkinson's patients may experience akinesia, finding themselves unable to initiate even simple voluntary movements."
"The echocardiogram revealed akinesia of the anterior wall of the left ventricle following the heart attack."
Rarely pluralized; the noun is almost always treated as uncountable in both neurological and cardiological contexts.
"Different patterns of regional akinesias were noted across the ventricular segments."
From the same Greek root for 'movement' that gave us cinema and kinetic energy comes a word for its total absence — akinesia, the body's refusal to move.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of akinesia
Akinesia derives from the Greek akinēsia, formed from a- ('without') combined with kinēsis ('movement'), itself from kinein, 'to move'. The term entered English through medical usage, borrowing directly from New Latin and Greek scientific vocabulary. It shares this Greek root with words such as kinetic, kinesiology, and cinema, all of which trace back to kinein.
Related word forms
How akinesia is actually used
A technical term used almost exclusively in medical and scientific contexts; it is rarely encountered in everyday speech. In neurological usage it is often discussed alongside related terms such as bradykinesia (slowed movement) and hypokinesia (reduced movement), from which it is distinguished by degree.
Easily confused with akinesia
Bradykinesia refers to abnormally slowed movement, whereas akinesia refers to the complete absence or inability to initiate voluntary movement.
Apraxia is the inability to carry out purposeful movements despite intact motor function and comprehension, while akinesia is a failure of movement initiation itself.