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athetosis

[ath-i-toh-sis] /ˌæθ ɪˈtoʊ sɪs/
noun, Pathology
1.
a condition, chiefly in children, of slow, involuntary, wormlike movements of the fingers, toes, hands, and feet, usually resulting from a brain lesion.
Origin
1870-1875
1870-75; < Greek áthet(os) not placed (a- a-6 + thetós, equivalent to the- (stem of tithénai to set, put) + -tos verbid suffix) + -osis
Related forms
athetosic, athetotic
[ath-i-tot-ik] /ˌæθ ɪˈtɒt ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for athetosis

athetosis

/ˌæθəˈtəʊsɪs/
noun
1.
(pathol) a condition characterized by uncontrolled rhythmic writhing movement, esp of fingers, hands, head, and tongue, caused by cerebral lesion
Derived Forms
athetoid, adjective
Word Origin
C19: from Greek athetos not in place, from a-1 + tithenai to place
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for athetosis
n.

1871, from Greek athetos "not fixed, without position or place, set aside" + -osis. Coined by U.S. nerve specialist William Alexander Hammond (1828-1900).

Online Etymology Dictionary, © 2010 Douglas Harper
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athetosis in Medicine

athetosis ath·e·to·sis (āth'ĭ-tō'sĭs)
n.
A constant succession of slow, writhing, involuntary movements of flexion, extension, pronation, and supination of fingers and hands, and sometimes of toes and feet.


ath'e·toid' or ath'e·to'sic or ath'e·tot'ic (-tŏt'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for athetosis

slow, purposeless, and involuntary movements of the hands, feet, face, tongue, and neck (as well as other muscle groups). The fingers are separately flexed and extended in an entirely irregular way. The hands as a whole are also moved, and the arms, toes, and feet may be affected. The condition is usually caused by malfunctioning of the basal ganglia of the cerebrum. The movements may or may not continue during sleep. They cannot be arrested for more than a moment by willpower and are aggravated by voluntary movements. See also cerebral palsy.

Learn more about athetosis with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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