tonic–clonic seizure

a seizure characterized by both tonic and clonic motor movements. In the tonic phase, the muscles go into spasm and the individual falls to the ground unconscious; breathing may be suspended. This is followed by the clonic phase, marked by rapidly alternating contraction and relaxation of the muscles, resulting in jaw movements (the tongue may be bitten) and urinary incontinence. Formerly called grand mal seizure.

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Psychology term of the day

November 18th 2024

critical region

a range of values that may be obtained from a statistical procedure that would lead to rejecting a specific claim about a population. More specifically, it is the portion of a probability distribution containing the values for a test statistic that would result in rejection of a null hypothesis in favor of its corresponding alternative hypothesis. Also called rejection region. Compare acceptance region.