tonic seizure


ton·ic sei·zure

a seizure characterized by a sustained increase in muscle tone, of abrupt or gradual onset and offset, lasting a few seconds to a minute, usually 10-20 seconds; tonic seizures affecting proximal muscles bilaterally frequently lead to the adoption of a posture.

ton·ic sei·zure

(tonik sēzhŭr) Attack characterized by a sustained increase in muscle tone, of abrupt or gradual onset and offset, lasting a few seconds to a minute; affected proximal muscles bilaterally frequently lead to the adoption of a certain posture.