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Wrist & Hand Lecture
Gross Anatomy of the Wrist and Hand
| Question | Answer |
|---|---|
| 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 |