clonic


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

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·nic

(klon'ik),
Relating to or characterized by clonus.

clonic

adjective Pertaining to clonus, see there.

clonic

adjective Pertaining to clonus, see there.

clo·nic

(klō'nik)
Relating to or characterized by clonus.

clonic

Pertaining to CLONUS.

clo·nic

(klon'ik)
Relating to or characterized by clonus.
References in periodicals archive ?
The Kruskal-Wallis test showed that the onset of PTZ-induced clonic seizure was different between treatment groups (X (2)(8)=45.85, P<0.001).
The patient had clonic jerks in the left arm that were time-locked with sharp waves.
Treatment Onset of clonic action in s Onset of tonic action in s (dose, Mean [+ or -] SEM Mean [+ or -] SEM mg/kg, i.p.) PTZ Control 47.80 [+ or -] 1.69 72.60 [+ or -] 1.78 (85) Embelin (2.5) 66.60 [+ or -] 1.40 (a) 88.60 [+ or -] 1.17 (a) Embelin (5) 88.20 [+ or -] 0.92 (a) 143.40 [+ or -] 1.40 (a) Embelin (10) 230.00 [+ or -] 4.44 (a) 349.40 [+ or -] 3.37 (a) Diazepam (4) Absence of convulsions Absence of convulsions Treatment No.
Phenytoin (PHT) is indicated for the treatment of partial and both primary and secondarily generalized tonic clonic seizures.
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).
For instance, if only a portion of the primary motor cortex is affected by epileptic activity, the patient may experience clonic jerking confined to the contralateral arm, while memory and awareness remain intact.
Clonic status epilepticus which may be accompanied by apnea is the most prominent seizure type.
Here, we describe a patient who developed tonic clonic seizures due to Theophylline toxicity, having ceased smoking 2 weeks earlier.
This event is characterized by a loss of consciousness, a brief period of muscle rigidity (tonic phase) followed by rhythmic jerking of all the patient's extremities (clonic phase) (Yamamoto et al., 2004).
A day before admission she had generalized tonic clonic convulsions that progressed to status epilepticus, followed by loss of consciousness.