Wrist Joint (Radio-Carpal Joint) and Hand Dr. Sama ul Haque

Objectives Understand the formation of the wrist joint and its type. Know the movements taking place at wrist joint. Explain the articulation of the wrist joint with carpal bones. Define thenar and hypothenar eminences. Explain the muscles of the hand in terms of their origin, insertion and nerve supply. Discuss the actions of the muscles of the hand. Explain the movements of thumb. Describe the fascial planes of the hand.

Wrist joint and Carpal Bones (Anterior View) Sally Left The Party To Take Cathy Home

Wrist joint and Carpal Bones (Posterior View)

Wrist joint Articulation Type Capsule Ligaments Movements

Wrist joint Articulation: Between Distal end of the radius and the articular disc above and scaphoid, lunate, and triquetral bones below

Synovial of Ellipsoid Variety Wrist joint Type: Synovial of Ellipsoid Variety

Wrist joint (Capsule and Ligaments)

Wrist joint (Capsule and Ligaments)

Wrist joint All carpal bones articulate via gliding or plane joints. A joint exists between proximal row and distal row of bones called mid-carpal Joint (Scaphoid, Lunate and Triquetrum with Trapezium, Trapezoid, Capitate and Hamate). Pisiform is not involved.

Bones of the Hand (Anterior View)

Bones of the Hand (Posterior View)

Metacarpophalangeal and interphalangeal Joints & ligaments

Muscle of the Hand Thenar muscles: 1. Abductor Pollicis brevis, 2. Flexor Pollicis brevis and 3. Opponens Pollicis. Hypothenar muscles: 1. Abductor digiti minimi, 2. Flexor digiti minimi and 3.Opponens digiti minimi. Small muscles of the hand: 1. Lumbricals, 2. Interossei (palmar and dorsal), and 3. Adductor Pollicis.

Short Muscles of the Thumb (Thenar Eminence)

Muscles forming Thenar Eminence

Short Muscles of the Little Finger (Hypothenar Eminence)

Muscles forming Hypothenar Eminence

Short Muscles of the Hand

Palmaris Brevis

Lumbricals

Short Muscles of the Hand

Palmar Interossei

Dorsal Interossei

Movements of fingers

Synovial Sheath and Fibrous digital sheath

http://video.about.com/ergonomics/Carpal-Tunnel-Syndrome.htm

Ulnar Nerve Radial Nerve

Median Nerve

Cutaneous Innervation of the Hand

Areas of Ulnar & Radial Arteries Supply

Deep Palmar Arch Direct continuation of Radial artery. Deeply placed in palm in front of the metacarpal bones & Interosseous muscles. The Arch on medial side is completed by deep branch of the ulnar artery.

Deep Palmar Arch

Superficial Palmar Arch Direct continuation of Ulnar artery. Superficially placed in palm in front of the long flexor tendons. The Arch on lateral side is completed by superficial palmar branch of the radial artery.

Superficial Palmar Arch

Superficial Veins of the Upper Limb Dorsal venous arch Veins of the Palm Cephalic vein Basilic vein

Dorsal venous arch Lies in the subcutaneous tissue proximal to Metacarpophalangeal joints Drains on the lateral side into the Cephalic vein Drains on the medial side into the Basilic vein Communicates with the deep veins of the palm freely

Dorsal Venous Arch

Median Cubital Vein

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