clonus

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Related to Clonic seizures: Atonic Seizures

clonus

 [klo´nus]
1. alternate involuntary muscular contraction and relaxation in rapid succession.
2. a continuous rhythmic reflex tremor initiated by the spinal cord below an area of spinal cord injury, set in motion by reflex testing.
ankle clonus (foot clonus) a series of abnormal reflex movements of the foot, induced by sudden dorsiflexion, causing alternate contraction and relaxation of the triceps surae muscle.
toe clonus abnormal rhythmic contraction of the great toe, induced by sudden passive extension of its first phalanx.
wrist clonus spasmodic contraction of the hand muscles, induced by forcibly extending the hand at the wrist.

clo·nus

(klō'nŭs),
A form of movement marked by contractions and relaxations of a muscle, occurring in rapid succession seen with, among other conditions, spasticity and some seizure disorders.
See also: contraction.
[G. klonos, a tumult]

clonus

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

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

Neurology
1. A volley of muscle contractions and relaxations, occurring in rapid succession.
2. An abrupt transient muscle contraction.

clo·nus

(klō'nŭs)
A form of movement marked by contractions and relaxations of a muscle, occurring in rapid succession; seen with, among other conditions, spasticity, and some seizure disorders.
See also: contraction
Synonym(s): clonospasm.
[G. klonos, a tumult]

clonus

Repetitive contraction and relaxation of stretched muscles which have been deprived of the smoothing and controlling influence of higher centres in the nervous system, in conditions such as STROKE. A feature of an ‘upper motor neurone lesion’. Clonus is also a feature of GRAND MAL epilepsy.

clo·nus

(klō'nŭs)
A form of movement marked by contractions and relaxations of a muscle, occurring in rapid succession seen with, among other conditions, spasticity and some seizure disorders.
[G. klonos, a tumult]
References in periodicals archive ?
One can notice the first case particularity, the tonic clonic seizure complications secondary to cerebral involvement.
The aqueous extract at doses of 800, 1600, and 3200 mg/kg significantly increased the latency time to the onset of myoclonic seizure by 221.2, 370.6, and 378.5% ([F.sub.(5,41)], 40.8; P < 0.001) and clonic seizure by 310, 394.6, and 401.9% ([F.sub.(5,41)], 36.9; P < 0.001) in comparison to the control group (figure 1).
Her brief interictal periods [5-10 mts] were punctuated by clonic seizures of left face, upper and lower limbs [1-2 mts].
Other factors which are found to affect the prognosis negatively include generalized tonic clonic seizures during sleep and familial history of epilepsy (51).
The established drugs for treatment of partial and generalized tonic clonic seizures are carbamazepine (Tegretol), phenobarbital, phenytoin (Dilantin), primidone (Mysoline) and valproate (Depakote).
Guaifenesin at doses of 100, 200, 300, and 400 mg/kg significantly increased time to the onset of clonic seizure by 141.8, 124.2, 473, and 1721%, respectively, compared to the control group (P<0.05, figure 1).
Among the total number of cases the majority are generalised tonic clonic seizures i.e., 35%(15 out of 40) followed by status epilepticus and complex partial seizures each of 10%(4 out of 40).
phenytoin sodium extended Available since 1938, used today for partial seizures and tonic- clonic seizures. A morbilliform rash is seen in approximately 5%- 10% patients; usually not servere but cases of Stevens-Johnson syndrome have been reported.
Out of 8 cases unclassified epilepsy, 5 (62.5 %) had multiple seizures in the form of generalized tonic clonic seizures and myoclonic seizures, 3 cases (37.5 %) had partial epilepsy with myoclonic seizures.
Women who have refractory complex partial seizures or generalized tonic clonic seizures are most likely to experience catamenial exacerbation, which occurs most commonly at the time of menstruation.
For generalized tonic clonic seizures, or any seizure with a combination of tonic or clonic movements, the first aid steps are to stay calm, remove any objects from the vicinity that may cause harm to the child while she is having a seizure, or take the child away from an area that may harm her.
In addition, perampanel has been approved in more than 50 countries, including the United States, Japan, in Europe and in Asia for treatment as an adjunctive therapy for primary generalized tonic clonic seizures in patients with epilepsy 12 years of age and older.