Which deep tendon reflex corresponds to ankle movement?

The deep tendon reflex that corresponds to ankle movement is primarily associated with the S1 nerve root. This reflex is significant because the S1 nerve root plays a crucial role in the function of the muscles involved in plantar flexion at the ankle, which is the movement of pointing the toes away from the body. The S1 nerve innervates the gastrocnemius and soleus muscles, which are key for this movement.

When a practitioner tests the ankle reflex (also known as the Achilles reflex), they tap the Achilles tendon while the foot is slightly dorsiflexed. A normal response is a contraction of the calf muscles, leading to plantar flexion of the foot. This response indicates that the S1 nerve root is functioning correctly.

The other options refer to different areas of the nervous system and specific reflexes not directly related to ankle movement. Some may pertain to upper limb movements or other regions of the body, thus making them unrelated to the question of ankle movement.