Download Wrist joint and Hand

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
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/CarpalTunnel-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
Thank You