Review Note
Last Update: 10/23/2024 08:41 PM
Current Deck: Steady Anatomy Exam 2::L26 Hand
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Branches of Ulnar Nerve in hand
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Extra 1
Ulnar (C8, T1):
Enters hand via canal of Guyon (ulnar canal).
• Palmar cutaneous branch to medial side of palm.
• Dorsal cutaneuous branch passes under FCU tendon and extends distally across dorsum of
hand, including dorsal surfaces of the medial 1 1⁄2 digits (see Radial n. picture). Distal to the flexor retinaculum, gives off 2 branches:
• Superficial branch – becomes common palmar digital nerves and then proper palmar digital
nerves
• Deep branch – passes between AbdDM and FDMB tendons, passes deep to the flexor tendons
along the path of the deep palmar arch, and innervates:
• Palmaris Brevis
• Hypothenar muscles (OAF)
• 3rd and 4th Lumbricals
• Dorsal Interossei
• Palmar Interossei
• Adductor Pollicis
Enters hand via canal of Guyon (ulnar canal).
• Palmar cutaneous branch to medial side of palm.
• Dorsal cutaneuous branch passes under FCU tendon and extends distally across dorsum of
hand, including dorsal surfaces of the medial 1 1⁄2 digits (see Radial n. picture). Distal to the flexor retinaculum, gives off 2 branches:
• Superficial branch – becomes common palmar digital nerves and then proper palmar digital
nerves
• Deep branch – passes between AbdDM and FDMB tendons, passes deep to the flexor tendons
along the path of the deep palmar arch, and innervates:
• Palmaris Brevis
• Hypothenar muscles (OAF)
• 3rd and 4th Lumbricals
• Dorsal Interossei
• Palmar Interossei
• Adductor Pollicis
Extra 2
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