The quadriceps reflexes, a common medical terminology used by doctors and healthcare providers to refer to a set of knee-jerk reflexes, can also be referred to by several synonyms. These include patellar reflexes, knee reflexes, or stretch reflexes. The patellar reflex is a commonly used term that refers specifically to the reflex generated by striking the patellar tendon below the knee, causing a sudden extension of the quadriceps muscle in the thigh. The knee reflex is a general term used to describe any reflex action generated by tapping the knee with a reflex hammer. Lastly, stretch reflexes refer to a group of reflexes that occur in response to stretching a muscle.