clonus


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to clonus: ankle clonus

clo·nus

 (klō′nəs)
n. pl. clo·nus·es
An abnormality in neuromuscular activity characterized by rapidly alternating muscular contraction and relaxation.

[New Latin, from Greek klonos, turmoil.]

clon′ic (klŏn′ĭk, klō′nĭk) adj.
clo·nic′i·ty (klō-nĭs′ĭ-tē, klŏ-), clo′nism (klō′nĭz′əm, klŏn′ĭz′əm) n.

clonus

(ˈkləʊnəs)
n
(Pathology) a type of convulsion characterized by rapid contraction and relaxation of a muscle
[C19: from New Latin, from Greek klonos turmoil]
clonic adj
clonicity n

clo•nus

(ˈkloʊ nəs)

n., pl. -nus•es.
a rapid succession of flexions and extensions of a muscle group during movement, often symptomatic of a nervous system disorder.
[1810–20; < New Latin < Greek klónos turmoil]
clon•ic (ˈklɒn ɪk) adj.
clo•nic•i•ty (kloʊˈnɪs ɪ ti, klɒ-) n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.clonus - convulsion characterized by alternating contractions and relaxations
convulsion - violent uncontrollable contractions of muscles
Translations

clo·nus

n. Gr. clono, serie de contracciones rápidas y rítmicas de un músculo.

clonus

n clonus m
References in periodicals archive ?
As the severity progresses to life-threatening, the clonus may convert from inducible to spontaneous and slow, continuous lateral eye movements may be present.
DAKOTA has cerebral palsy and suffers from seizures, global developmental disorder and muscle disorders clonus and dystonia.
El baclofeno es un agonista especifico del receptor GABA B, cuya accion es reducir la frecuencia e intensidad de los espasmos, alivia el dolor, el clonus y la rigidez muscular (2,20).
(4) It is well known that PTZ, at doses of 90 to 100 mg/kg, creates generalized tonic-clonic seizures (GTCs) in rodents which progress from mild myoclonic jerks to the clonus of the face and forelimbs without righting reflex loss, to the clonic seizures of the limbs with righting reflex loss, to the full tonic extension of both forelimbs and hind limbs.
The Achilles reflexes were absent in both lower extremities, and no pathological reflexes were noted (i.e., Babinski, ankle clonus).
Stages of seizure activity were; (0) no difference; (1) freezing; (2) tongue protrusion and neck spasms; (3) forelimb clonus; (4) forelimb clonus and tonic activity in the upper part of the body with rearing and/or falling over; (5) generalized convulsions with rearing, falling over and jumping.
Physical examination revealed that upper motor neuron findings were identified in the form of spasticity, hyperreflexia, and clonus. Hyperreflexia and spasticity were present all over the upper and lower limbs but more marked in lower than upper limbs.
Left LL--in initial testing it has a deficit paretic motor, ROT vii, Babinski present, possible orthostatism with bilateral support; in final testing - paretic motor deficit, motor control partially recovered - distal, Ashworth spasticity = 2 plantar flexors, plantar clonus (2-3 muscular contractions), Achilles tendon retraction, Babinski present, ROT vii, genu flexum(flexed knee) 20[degrees], Left side hip - limited mobility : ROE = 30[degrees], ROI = absent, flexion = 90[degrees], absent abduction and extension, abduction = 15[degrees].
Diversos signos clinicos positivos del sindrome de motoneurona superior estan relacionados con la espasticidad, tales como el clonus, espasmo e hiperreflexia, pero es claro que estos signos pueden presentarse independientemente uno de otro y no necesariamente compartir una fisiopatologia comun.
Mid-August, during a dressing change, the intern doctor noted clonus of the lower limbs and investigated thoroughly.
In the chronic stage of capsular hemiplegia, H reflex and even the tendon reflex are elicited in pretibial muscles in addition to hyperactive tendon reflex with ankle clonus in the triceps surae muscles.
Facial Muscle Spasm (FMS) refers to the stiffness or clonus of muscles controlled by homolateral facial nerves, which is painless, intermittent, unspontaneous and irregular.