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clonus |
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clonus /clo·nus/ (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.clon´ic 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. wrist clonus spasmodic movement of the hand, induced by forcibly extending the hand at the wrist.
clonus [klō′nəs] Etymology: Gk, klonos, tumult an abnormal pattern of neuromuscular activity, characterized by rapidly alternating involuntary contraction and relaxation of skeletal muscle. Compare tonus. clonic, adj. 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.
clonus (klōˑ·n n abnormal neuromuscular activity marked by the involuntary relaxation and contractions of the skeletal muscles.
clonus (klō´n n an alternating muscular spasm and relaxation in rapid succession.
clonus alternate involuntary muscular contraction and relaxation in rapid succession. A sign of upper motor neuron disease.
clonus Neurology 1. A volley of muscle contractions and relaxations, occurring in rapid succession 2. An abrupt transient muscle contraction Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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ankle clonus blepharoclonus Braxton Hicks contractions bronchial spasm bronchospasm C clonic clonic spasm clonicity clonospasm epilepsy hourglass contraction hypertonus isometric contraction juvenile myoclonic epilepsy long tract signs myospasm nodding spasm paradoxical contraction | Tonic clonic seizures - This considered to be extremely intense among every kind of seizures, they could be characterized through lack of consciousness, body shivering and stiffening and have no control on bladder or at times tongue biting. Other types of generalized seizures are: tonic seizures which involve muscie rigidity but are not followed by a clonic phase; clonic seizures which involve violent rhythmic contractions but is not preceded by tonic phase; myoclonic seizures in which a person has brief involuntary jerking of the torso or extremities; and atonic seizures in which the skeletal muscles lose all tone causing the person to suddenly drop to the floor. Behavioral responses of the animals to PTZ administration were evaluated using these criteria: latency to first minimal clonic seizure (MCS), incidence of MCS, latency to the first generalized tonic-clonic seizures (GTCS), incidence of GTCS, protection percentage against GTCS and protection percentage against mortality. |
Clonic seizure |
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