clonic
Jerking then relaxing
Clonic describes a type of muscle spasm characterized by rapid, rhythmic contractions and relaxations—the jerking movements seen in some seizures.
A clonic seizure involves repeated muscle twitching, distinguished from tonic seizures where muscles simply stiffen.
The term appears almost exclusively in medical contexts.
Involuntary muscular contractions
- jerkingAbrupt, spasmodic movement
- shakingRapid involuntary movement
- tremblingInvoluntary shaking motion
- shudderingConvulsive trembling motion
quivering · thrashing · jolting · spasm · contraction · convulsing · juddering · rhythmic
Brain disorder causing seizures
- seizureForcible taking or convulsion
- myoclonusSudden brief muscle jerks
- paroxysmViolent sudden outburst
- fitProper or healthy
grand mal · absence · petit mal · postictal · aura · phenytoin · valproate · electroencephalogram
Involuntary rhythmic shaking
- ticInvoluntary repetitive movement
- myoclonusSudden brief muscle jerks
- spasticityPathological muscle tightness
- fasciculationSpontaneous motor neuron discharge
rigidity · dystonia · chorea · reflex · Babinski · diagnosis · prognosis · treatment
Organ's external tissue
- neuronImpulse-conducting cell
- synapseNerve signal crossing point
- brainwaveSudden clever idea
- encephalogramBrain wave recording
neurotransmitter · motor cortex · discharge · excitation · inhibition · GABA · glutamate · threshold
twitching
Involuntary muscular contractions
- jerkingAbrupt, spasmodic movement
- shakingRapid involuntary movement
- tremblingInvoluntary shaking motion
shuddering · quivering · thrashing · jolting · spasm · contraction · convulsing · juddering · rhythmic · repetitive
epilepsy
Brain disorder causing seizures
- seizureForcible taking or convulsion
- myoclonusSudden brief muscle jerks
- paroxysmViolent sudden outburst
fit · grand mal · absence · petit mal · postictal · aura · phenytoin · valproate · electroencephalogram · kindling
tremor
Involuntary rhythmic shaking
- ticInvoluntary repetitive movement
- myoclonusSudden brief muscle jerks
- spasticityPathological muscle tightness
fasciculation · rigidity · dystonia · chorea · reflex · Babinski · diagnosis · prognosis · treatment · phenotype
cortex
Organ's external tissue
encephalogram · neurotransmitter · motor cortex · discharge · excitation · inhibition · GABA · glutamate · threshold · focal