Definitions
from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An abnormality in neuromuscular activity characterized by rapidly alternating muscular contraction and relaxation.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a muscular spasm with regular contractions
from the GNU version of the Collaborative International Dictionary of English
- n. A series of muscular contractions due to sudden stretching of the muscle, -- a sign of certain neuropathies.
from The Century Dictionary and Cyclopedia
- n. In pathology, alternating contractions and relaxations of a muscle following one another in somewhat quick succession. See clonic spasm and ankle-clonus.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. convulsion characterized by alternating contractions and relaxations
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
Examples
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The plantar and patellar reflexes were much exaggerated, and there was ankle clonus, most marked in the left limb.
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Considerable power had been regained in the lower extremity, so that the patient could walk with help, but foot-drop persisted; the gait was spastic in character, the reflexes were much exaggerated, and there was marked clonus.
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There was neither ankle nor patellar clonus, and the other reflexes were present and normal.
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Patellar reflexes were markedly exaggerated on both sides, the left more so than the right, and ankle clonus was present on the left side.
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Tapping of one knee tended to set musculature of opposite knee in mild clonus of short duration.
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Both deep and superficial reflexes exaggerated; ankle clonus both sides; hyperæsthesia of abdomen and face.
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Upon tapping, the quadriceps tendon caused a brisk marked contraction of thigh muscles, followed by mild clonus.
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No foot clonus, no Babinski; abdominal reflexes present, cremasteric not elicited; catalepsy not always present.
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Musculature of legs was in a constant mild clonus, and the right foot was kept in position of talipes equinovarus.
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There is an attempt at, but no true, clonus; that is, passive flexion of the foot causes two or three jerky movements.
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