While observing the neurologist complete a neurologic examination, the nurse notes that a patient has an absent left patellar reflex. Which possible areas of dysfunction does the nurse consider? (Select all that apply.)

Question

Quizplus · Accepted Answer

The patellar reflex, also known as the knee-jerk reflex, is mediated by the L2-L4 spinal nerve roots, involves the femoral nerve, and tests the function of the quadriceps femoris muscle. An absent patellar reflex could indicate dysfunction in any of these areas: the spinal cord (at the level of the lumbar vertebrae involved in the reflex arc), the femoral nerve (which innervates the quadriceps femoris muscle), or the quadriceps femoris muscle itself (which is responsible for extending the knee and is the effector muscle in the patellar reflex). The anterior fibula muscle and posterior tibial muscle are not directly involved in the patellar reflex.

While Observing the Neurologist Complete a Neurologic Examination, the Nurse