Median nerve
- Enters the palm deep to the flexor retinaculum via the carpal tunnel
- Motor (recurrent) branch: supplies the three thenar muscles plus the lateral two lumbricals
- Cutaneous (palmar digital) branches: supplies the thumb and lateral two and a half fingers and distal half of the dorsal aspect of the same fingers
Image Source: Anatomy and Cell Biology, Queen's Univeristy
Ulnar nerve
- Enters the palm superficial to flexor retinaculum via Guyan’s canal
- Motor (deep) branch: supplies the hypothenar muscles, interossei, lumbricals 3 & 4, adductor pollicis
- Cutaneous (superficial) branch: supplies the palmar and dorsal aspects of the medial one and a half fingers as well as the medial palm
Radial nerve
- Cutaneous (superficial) branch: supplies the lateral two thirds of the dorsal surface of the hand and the dorsal surface of the thumb as well as the proximal lateral two and a half fingers