Which reflex is most commonly associated with the C6 nerve root?

Which reflex is most commonly associated with the C6 nerve root?

• A. Brachioradialis
• B. Biceps reflex
• C. Patellar reflex
• D. Triceps reflex

Answer: (A)

Focus on where the C6 nerve root shows its quickest reflex response. The brachioradialis reflex is the one most closely linked to C6. When you tap the brachioradialis tendon about 1–2 inches above the radial styloid with the forearm in a neutral position, the normal reaction is elbow flexion with a little forearm rotation. This reflex arc involves fibers from the C6 root via the radial nerve to the brachioradialis muscle, making it the classic test for C6 function. In contrast, the biceps reflex is primarily a C5–C6 test, the triceps reflex tests the C7–C8 level, and the patellar reflex tests L3–L4. So, for the C6 level, the brachioradialis reflex is the most representative.

Focus on where the C6 nerve root shows its quickest reflex response. The brachioradialis reflex is the one most closely linked to C6. When you tap the brachioradialis tendon about 1–2 inches above the radial styloid with the forearm in a neutral position, the normal reaction is elbow flexion with a little forearm rotation. This reflex arc involves fibers from the C6 root via the radial nerve to the brachioradialis muscle, making it the classic test for C6 function.

In contrast, the biceps reflex is primarily a C5–C6 test, the triceps reflex tests the C7–C8 level, and the patellar reflex tests L3–L4. So, for the C6 level, the brachioradialis reflex is the most representative.