What does astasia mean?
Astasia is a medical term denoting the inability to stand or maintain an upright posture as a result of impaired motor coordination, notably in the absence of muscle weakness. A patient with astasia may be able to move their legs normally when seated or lying down, yet sway, stagger, or collapse upon attempting to stand. The word is most frequently encountered in the combined form astasia-abasia, which describes difficulty both in standing and in walking — a pattern seen in certain neurological disorders and, classically, in some functional or conversion disorders. Derived from Greek roots meaning 'without standing', it entered English medical vocabulary in the nineteenth century and remains in specialist use in neurology and psychiatry. Though rarely heard outside clinical settings, astasia offers a precise label for a striking and diagnostically meaningful symptom.
nounThe inability to stand or maintain an upright posture owing to impairment of muscular coordination, typically without accompanying muscle weakness. It is chiefly used as a medical and neurological term, often appearing in the combined form 'astasia-abasia' to denote an inability both to stand and to walk.
- Inability to stand or maintain an upright posture due to impaired motor coordination, especially when not explained by muscle weakness.
"Following the stroke, the patient's pronounced astasia meant she could not remain upright even though her leg muscles were strong."
"The neurologist noted marked astasia: the patient swayed and could not hold himself upright, yet showed no weakness when tested lying down."
"In conversion disorder, astasia-abasia often presents dramatically, with patients lurching or falling only when attempting to stand."
Rarely pluralized; the plural appears only when discussing multiple distinct clinical cases or presentations.
"The case series described several astasias of differing neurological origin."
From the Greek for 'not standing', astasia names a puzzling condition where patients can move their legs fine in bed but collapse the moment they try to stand.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of astasia
Astasia derives from the Greek 'astasia', formed from the negative prefix 'a-' plus 'stasis', meaning 'standing' or 'posture'. The root 'sta-' ('to stand') is one of the most productive in Indo-European, yielding a wide family of English words including 'static', 'status', and 'ecstasy'. The term was adopted into medical Latin and entered English usage in the nineteenth century, primarily within neurology.
Related word forms
How astasia is actually used
A technical term used almost exclusively in medical, neurological, and psychiatric contexts; it is rare in general prose. It most commonly appears in the compound form 'astasia-abasia'.
Easily confused with astasia
Abasia is the inability to walk, whereas astasia is specifically the inability to stand; the two frequently occur together as astasia-abasia.
Ataxia is a general lack of muscle coordination affecting voluntary movements, while astasia refers more narrowly to the failure to maintain an upright standing posture.