In cervical radiculopathy, what sensation is associated with the C7 nerve root?

In cervical radiculopathy, the C7 nerve root is primarily responsible for the sensory innervation of specific areas in the upper extremity. The C7 nerve root particularly affects the sensation of the index and long fingers. This is due to the specific dermatomes associated with the cervical nerve roots, where C7 is linked to the middle part of the hand, including the index finger and the long finger.

Understanding the anatomy of the brachial plexus and its dermatomes helps clarify the regions affected by various nerve root compressions or injuries. The C7 root, when compromised, can lead to symptoms such as pain, numbness, or tingling sensation in the region of the index and long fingers. This particular presentation is important for diagnosing cervical radiculopathy, as it guides the physician in localizing the neurological issue based on the affected dermatome.

The other answer choices correspond to different nerve roots not associated with C7: the dorsum of the hand is largely covered by C6 and C8, the lateral foot is innervated by the S1 nerve root, and the shin is associated with the L4 nerve root. Thus, understanding the linking of nerve roots to specific dermatomes is essential for accurate assessment