Which nerve root corresponds to sensation in the lateral forearm and thumb?

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Prepare for the Selected Cervical Pathologies, Dysfunctions, and Treatments Test with diverse question formats. Learn through explanations and hints to ensure understanding. Be exam-ready!

Multiple Choice

Which nerve root corresponds to sensation in the lateral forearm and thumb?

Explanation:
The distribution described falls into the C6 dermatome. Dermatomes map which skin areas are supplied by each cervical nerve root, and the lateral forearm extending toward the thumb is characteristic of C6. In contrast, C5 covers the lateral upper arm near the shoulder, C7 covers the middle finger region, and C8 covers the little finger and medial forearm. So sensation on the lateral forearm and thumb best fits the C6 nerve root.

The distribution described falls into the C6 dermatome. Dermatomes map which skin areas are supplied by each cervical nerve root, and the lateral forearm extending toward the thumb is characteristic of C6. In contrast, C5 covers the lateral upper arm near the shoulder, C7 covers the middle finger region, and C8 covers the little finger and medial forearm. So sensation on the lateral forearm and thumb best fits the C6 nerve root.

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