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
The plantar and patellar reflexes were much exaggerated, and there was ankle clonus, most marked in the left limb.
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.
There was neither ankle nor patellar clonus, and the other reflexes were present and normal.
Patellar reflexes were markedly exaggerated on both sides, the left more so than the right, and ankle clonus was present on the left side.
Tapping of one knee tended to set musculature of opposite knee in mild clonus of short duration.
Both deep and superficial reflexes exaggerated; ankle clonus both sides; hyperæsthesia of abdomen and face.
Upon tapping, the quadriceps tendon caused a brisk marked contraction of thigh muscles, followed by mild clonus.
No foot clonus, no Babinski; abdominal reflexes present, cremasteric not elicited; catalepsy not always present.
Musculature of legs was in a constant mild clonus, and the right foot was kept in position of talipes equinovarus.
There is an attempt at, but no true, clonus; that is, passive flexion of the foot causes two or three jerky movements.