Which reflex is associated with the C6 nerve root?

The biceps reflex is associated with the C6 nerve root. This reflex is a deep tendon reflex that is typically elicited by tapping the biceps tendon, which is located at the elbow. When the tendon is struck, a sensory signal travels via the C6 nerve root to the spinal cord, where it synapses with motor neurons that coordinate a contraction of the biceps muscle, causing a visible flexion of the elbow.

The C6 nerve root primarily innervates muscles in the upper arm, including the biceps, and is responsible for both motor and sensory functions in that area. In contrast, the other reflexes mentioned involve different nerve roots. The patellar tendon reflex is associated with the L4 nerve root, the triceps reflex is linked to the C7 nerve root, and the Achilles tendon reflex corresponds with the S1 nerve root. Thus, the biceps reflex distinctly highlights the function of the C6 nerve root in the body's neuromuscular system.