Convulsion
[医] 惊厥kon-VUL-shun
释义：form of com "with, together" (see con-) + vellere "to pluck, pull violently"
A series of violent, involuntary muscle contractions; a tonic convulsion involves prolonged muscle contraction; in a clonic convulsion, there is alternation of contraction and relaxation; both forms appear in grand mal epilepsy