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Wrist & Hand Lecture

Gross Anatomy of the Wrist and Hand

8 Carpal Bones Scaphoid, Lunate, Triquetrum, Pisiform, Trapezium, Trapezoid, Capitate, Hamate
Bones of Hand 5 Metacarpals : Thumb composed of proximal and distal phalanges and fingers composed of proximal, middle, and distal phalanges.
Contents of Carpal Tunnel 4 FDS tendons, 4 FDP tendons, Median Nerve, and Flexor Pollicis Longus
Thenar Compartment Thenar Eminence and Muscles on Radial Side of Palm
Hypothenar Compartment Hypothenar Eminence and Muscles on Ulnar Side of Palm
Fascia Covering Flexor Tendons? Palmar Aponeurosis
Thenar Muscles (Inn. by Median Nerve) ABductor Pollicis Brevis, Flexor Pollicis Brevis, and Opponens Pollicis
ADductor Pollicis Prox. Oblique Head Oblique Head: Base of 2-3 metacarpals and capitate/adjacent carpal bones
ADductor Pollicis Prox. Transverse Head Anterior surface of 3rd metacarpal
ADductor Pollicis Dist. Medial side of 1st phalanx of thumb
ADductor Pollicis Act. Adducts thumb
ADductor Pollicis Inn. Deep Ulnar Nerve branch
Hypothenar Muscles (Inn. by Ulnar Nerve) ABductor Digiti Minimi, Flexor Digiti Minimi Brevis, and Opponens Digiti Minimi
Short Muscles of Hand Lumbricals 1-2 (median nerve) and Lumbricals 3-5 (ulnar nerve)
Dorsal Interossei Act. ADducts digits 2-4 and assists lumbricals
Dorsal Interossei Inn. Deep Branch of Ulnar Nerve
Palmar Interossei Inn. Deep Ulnar Nerve
Central Bands Extensor Mechanism Attach to proximal and middle phalanx
Lateral Bands Extensor Mechanism Pass around PIP and rejoin at distal phalanx
Nerves of Hand Median, Ulnar, Radial (inn. skin and dorsum)
Arteries of Hand Radial and Ulnar
Superficial Palmar Arch Mainly Ulnar Artery (larger)
Deep Palmar Arch Direct continuation of Radial Artery
Created by: frankfrank05