Which nerve root supplies sensation to the little finger?

Which nerve root supplies sensation to the little finger?

• A. C7
• B. C8
• C. T1
• D. C6

Answer: (B)

Sensation in the little finger aligns with the C8 dermatome. Dermatomes are skin areas supplied by a single nerve root, and for the hand, the little finger corresponds to C8. The ulnar nerve, which carries sensation from the little finger, is formed from C8 and T1 nerve roots, so the root most closely associated with that sensation is C8. To place the other options in context: C6 covers the thumb and lateral hand; C7 maps to the middle finger; T1 covers the medial forearm and adjacent areas rather than the digit itself.

Sensation in the little finger aligns with the C8 dermatome. Dermatomes are skin areas supplied by a single nerve root, and for the hand, the little finger corresponds to C8. The ulnar nerve, which carries sensation from the little finger, is formed from C8 and T1 nerve roots, so the root most closely associated with that sensation is C8.

To place the other options in context: C6 covers the thumb and lateral hand; C7 maps to the middle finger; T1 covers the medial forearm and adjacent areas rather than the digit itself.