Which nerve root is responsible for symptoms in the dorsal and lateral neck down to the anterior portion of the clavicle?

• A. C2-3
• B. C3-4
• C. C4-5
• D. C5-6

Answer: (B)

The symptoms affecting the dorsal and lateral neck down to the anterior portion of the clavicle are primarily associated with the C3-4 nerve roots. The C3 nerve root contributes to the sensory supply in the neck region, including parts of the lateral neck and the upper trapezius area, while the C4 nerve root plays a role in the sensory innervation to the area overlying the anterior clavicle and shoulder region.

This pattern of innervation is important for distinguishing the area affected by potential nerve root compression or irritation, as each nerve root has a specific dermatomal distribution. In this case, discomfort or symptomatology in the indicated regions suggests that the C3 and C4 distributions are likely being impacted, and thus making C3-4 the correct choice.