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)
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Wrist joint and Carpal Bones (Posterior View)
• Articulation
• Type
• Capsule
• Ligaments
• Movements
Wrist joint
Articulation: Between
Distal end of the radius and the articular disc above
andscaphoid,
lunate, and triquetral bones
below
Wrist joint
Type:
Synovial of
Ellipsoid Variety
Wrist joint
Wrist joint (Capsule and Ligaments)
Wrist joint (Capsule and Ligaments)
• 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.
Wrist joint
Bones of the Hand (Anterior View)
Bones of the Hand (Posterior View)
Metacarpophalangeal and interphalangeal Joints & ligaments
Muscle of the HandMuscle 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.
• 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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