A physical therapist performs Tinel's sign by tapping over the cubital tunnel. The patient reports tingling sensations consistent with a positive finding. Which region of the hand would MOST likely be affected?

1. Dorsal-lateral aspect of the hand and first web space
2. Palmar aspect of all five digits
3. Hypothenar eminence and fifth digit
4. Thenar eminence and lateral three digits

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