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


Irregular, alternating muscular contractions and relaxations.



rhythmic contractions, in rapid succession, of single muscles or muscle groups. Clonus may be either spontaneous or provoked by external stimulation.

Mentioned in ?
References in periodicals archive ?
5) In addition to a patient's medication history, the clinical hallmark of SS that helps distinguish it from neuroleptic malignant syndrome, delirium, and other acute syndromes is clonus, which becomes spontaneous and sustained as the severity increases.
Baseline information related characteristics of participants including demographic data, age, gender, birth history, clonus, post-natal complication, convulsions and parental education and occupation were presented as frequencies and percentages.
13 Knee and ankle clonus 1986 [12] Major and 13f Transient loss of Huizenga sensation below the 1988 [13] waist and inability to move LL after fall on rib hub 5f No 11m No Deguchi 12f Weakness of the LL, et al.
At six month follow-up she had no gait disturbance, resolution of clonus, normalization of reflexes, and complete resolution of her pain symptoms.
Table 1: Kumar's classification of Tuberculous paraplegia Grade Clinical features 1 NEGLIGIBLE Unaware of neural deficit, Plantar extensor/ Ankle clonus 2 MILD Walk with support 3 MODERATE Non-ambulatory, Paralysis in extention, sensory loss <50% 4 SEVERE 3+ paralysis in flexion/sensory loss>50%/ Sphincters involved Table 2 : Kumar's Clinico Radiological Classification Stage Features Usual duration 1 Pre-destructive Straightening, spasm, <3 mo hyperemia in scinti 2 Early-destructive Diminished space 2-4 mo paradiscal erosion Knuckle <10 3 Mild kyphos 2-3 verte k:10-30 3-9 mo 4 Moderate kyphos >3 verte K:30-60 6-24 mo Severe kyphos >3 verte K:>60 >2 years
Hoffman, Achilles clonus, and Babinski signs were positive bilaterally.
Neurologic manifestations of AAI include positive Babinski sign, hyperactive deep tendon reflexes, ankle clonus, muscle weakness, increased muscle tone, neck discomfort, abnormal gait, and difficulty walking.
Posteriormente se definieron los criterios diagnosticos de Hunter, los cuales combinan clonus, temblor, hipertonia, hiperreflexia y temperatura mayor a 38 grados, en pacientes que esten en presencia de un agente serotoninergico (8-11).
et laeuo pressit pede talia fatus exanimem rapiens immania pondera baltei impressumque nefas: una sub nocte iugali caesa manus iuuenum foede thalamique cruenti, quae Clonus Eurytides multo caelauerat auro .
However in the lower limbs, spastic paraparesis was present with increased tone, ankle clonus, significantly brisk reflexes and bilaterally extensor plantar responses.
These stimulus parameters were similar to those used to reduce spasticity, hyperreflexia, and clonus [1,2,4,8,22,28] using these stimulus settings, each subject tested to determine the sensory or 1.