clonus

[ kloh-nuhs ]

noun

, Pathology.

, plural clo·nus·es.

1. a rapid succession of flexions and extensions of a group of muscles, usually signifying an affection of the brain or spinal cord.

clonus

/ ˈklɒnɪk; klɒˈnɪsɪtɪ; ˈkləʊnəs /

noun

1. a type of convulsion characterized by rapid contraction and relaxation of a muscle

Derived Forms

• clonic, adjective
• clonicity, noun

Word History and Origins

Origin of clonus¹

1810–20; < New Latin < Greek klónos turmoil

Word History and Origins

Origin of clonus¹

C19: from New Latin, from Greek klonos turmoil

Example Sentences

The knee-jerks and plantar reflexes are exaggerated, and there is marked ankle clonus.

From Project Gutenberg

There was neither ankle nor patellar clonus, and the other reflexes were present and normal.

From Project Gutenberg

No foot clonus, no Babinski; abdominal reflexes present, cremasteric not elicited; catalepsy not always present.

From Project Gutenberg

There is an attempt at, but no true, clonus; that is, passive flexion of the foot causes two or three jerky movements.

From Project Gutenberg

The plantar and patellar reflexes were much exaggerated, and there was ankle clonus, most marked in the left limb.

From Project Gutenberg