Which dermatome is on the outer aspect of the forearm?

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Multiple Choice

Which dermatome is on the outer aspect of the forearm?

Explanation:
Dermatomes are skin areas innervated by a single spinal nerve root. The outer (lateral/radial) aspect of the forearm is supplied mainly by the C6 dermatome, which includes the lateral forearm and the thumb. That’s why this region is mapped to C6. In contrast, the other listed dermatomes correspond to different regions: T2 is around the upper chest/axillary area, S3 covers the sacral/perineal region, and L3 involves the anterior thigh and knee area.

Dermatomes are skin areas innervated by a single spinal nerve root. The outer (lateral/radial) aspect of the forearm is supplied mainly by the C6 dermatome, which includes the lateral forearm and the thumb. That’s why this region is mapped to C6.

In contrast, the other listed dermatomes correspond to different regions: T2 is around the upper chest/axillary area, S3 covers the sacral/perineal region, and L3 involves the anterior thigh and knee area.

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