Which movement is tested by the L2 myotome?

Which movement is tested by the L2 myotome?

• A. Knee extension
• B. Ankle dorsiflexion
• C. Finger flexion
• D. Hip flexion

Answer: (D)

Testing a myotome links a spinal nerve root to a specific muscle action. The L2 level is tested by hip flexion, mainly using the iliopsoas. To check it, have the patient lie on their back and try to lift the thigh toward the abdomen against mild resistance. Strength here reflects the L2 motor function. Other movements map to different roots: knee extension tests the quadriceps and relates to a lower root, ankle dorsiflexion tests the tibialis anterior (a different level), and finger flexion involves nerves in the upper limb. So hip flexion is the movement that best corresponds to the L2 myotome.

Testing a myotome links a spinal nerve root to a specific muscle action. The L2 level is tested by hip flexion, mainly using the iliopsoas. To check it, have the patient lie on their back and try to lift the thigh toward the abdomen against mild resistance. Strength here reflects the L2 motor function. Other movements map to different roots: knee extension tests the quadriceps and relates to a lower root, ankle dorsiflexion tests the tibialis anterior (a different level), and finger flexion involves nerves in the upper limb. So hip flexion is the movement that best corresponds to the L2 myotome.