腱けん反はん射しゃ

noun

tendon reflex

Physiology term for the involuntary contraction of a muscle in response to a sudden stretch of its tendon, such as the knee-jerk reflex.

• 医い師しは膝ひざの腱けん反はん射しゃを調しらべた。

  The doctor checked the knee tendon reflex.