The term "elbow reflex" refers to an involuntary movement of the arm caused by a sudden tap on the elbow. However, there are several synonyms for this phenomenon. It is commonly known in medical circles as "triceps reflex" due to the involvement of the triceps muscle. Another synonym used is "brachioradialis reflex", named after the muscle responsible for the reflex. Additionally, it can be referred to as the "biceps reflex" as the biceps muscle plays a role in the reflex arc. These synonyms are all derived from the different muscles involved in this fascinating physiological response to a tap on the elbow.