Which of the following tests assesses both Achilles tendon function and spinal nerves?

The Achilles reflex test is designed to evaluate both the function of the Achilles tendon and assess the integrity of the spinal nerves involved in its reflexive pathway. When the Achilles tendon is tapped, it stimulates the stretch receptors in the tendon, which then send signals through the sensory neurons to the spinal cord, specifically involving the S1-S2 nerve roots.

The response is the contraction of the calf muscles, notably the gastrocnemius and soleus, which results in plantar flexion of the foot. Therefore, when this reflex is tested, it provides valuable information about both the integrity of the Achilles tendon itself and the functionality of the associated spinal nerves that control that reflex. This dual assessment makes the Achilles reflex test uniquely beneficial for evaluating both tendon function and spinal nerve pathways.

The other tests listed focus on different muscle groups and reflexes that do not serve the same dual purpose as the Achilles reflex test.