膝しつ蓋がい腱けん反はん射しゃ

noun

patellar reflex; knee-jerk reflex

Medical term for the reflex contraction of the quadriceps when the patellar tendon is tapped.

• 医い師しは膝しつ蓋がい腱けん反はん射しゃを調しらべるために膝ひざを叩たたいた。

  The doctor tapped the knee to test the patellar reflex.