The use of âholidayâ to mean âa missed spotâ appears to be that rarity in English etymology, a word or phrase that actually has a nautical origin. The original use of âholidayâ in the âmissed a spotâ sense, back in the 18th century, was in reference to crew members painting the decks of a ship or âpayingâ (sealing seams with tar or pitch) its hull.
The knee jerk reflex is when a tendon above the kneecap is tapped with a reflex hammer, which causes the whole leg to involuntarily jerk.
Rapid, synchronous muscle jerking: Introduction. Rapid, synchronous muscle jerking: also called myoclonus. They are quick, involuntary muscle jerks. See detailed information below for a list of 28 causes of Rapid, synchronous muscle jerking, Symptom Checker, including diseases and drug side effect causes. Â» Review Causes of Rapid, synchronous muscle jerking: Causes | Symptom Checker Â».