S22-912220 (sŭb-sŭl′tŭs) [L., to leap up] Any tremor, twitching, or spasmodic movement.
subsultus tendinum
An involuntary twitching of the muscles, esp. of those of the arms and feet, causing movement of the tendons. It is thought to be a hallmark of some febrile diseases, such as typhoid fever.