Download Ulnar nerve

Upper limb
Forearm
1
Anterior and posterior compartment
Lateral intermuscular septum
Anterior
compartment
外
Cubital fossa
內
Radius
Ulna
Posterior
compartment
Interosseous membrane
Ulna
Carpal tunnel
Radius
2
Anterior compartment
Ulnar nerve
Median nerve
Three layers:
• superficial
• intermediate
• deep
Function:
• Wrist movements
• Flexion of fingers
• Pronation
Flexor carpi radialis
Pronator teres
Palmaris longus
Flexor carpi ulnaris
Palmar aponeurosis
Superficial layer:
3
Flexor carpi ulnaris
Ulnar nerve
Humeral head
Ulnar head
Function: flexes and adducts wrist joint
Flexor carpi ulnaris
Innervation: ulnar nerve
Pisohamate ligament
Pisiform
Pisometacarpal ligament
4
Palmaris longus
1. Tendon: 中偏內側
2. Function: flexes wrist joint,
anchors skin
3. Innervation: median nerve
Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
Flexor carpi radialis
1. Tendon:中偏外側
2. Function: flexes and
abducts wrist
3. Innervation: median nerve
Palmar aponeurosis
5
Pronator teres
Humeral head
Ulnar head
Ulnar artery
Median nerve
Pronator teres
Origin: humeral head, ulnar head
Median nerve
passes between
two heads.
Insertion: mid-shaft of radius
Function: pronation
Innervation: median nerve
6
Intermediate layer:
Flexor digitorum superficialis
Ulnar artery
Radial head
Humero-ulnar
head
Median nerve
Flexor digitorum
superficialis
7
Ulnar nerve: innervates
medial half of flexor
digitorum profundus
Deep layer
Radius
Ulna
Interosseous
membrane
Flexor digitorum profundus
Flexor pollicis longus
Pronator quadratus
Flexor retinaculum
8
Brachial artery
Anterior ulnar recurrent artery
Radial recurrent artery
Anterior and posterior
interosseous arteries
Radial artery
Posterior ulnar recurrent artery
Ulnar artery
Common interosseous artery
Palmar carpal branches
Superficial palmar branch
Deep palmar branch
Deep palmar arch
9
Superficial palmar arch
Median nerve
Radial nerve
Deep branch
Ulnar nerve
Flexor carpi ulnaris
Supinator
Superficial branch
Pronator teres
Anterior
interosseous
nerve
Pronator quadratus
Palmar branch
Dorsal branch
Palmar branch
10
Posterior compartment
Two layers:
• superficial
• deep
Lateral epicondyle
Brachioradialis
Function:
• wrist movements
• extension of fingers
• supination
Anconeus
Extensor carpi
radialis longus
Extensor carpi
radialis brevis
Extensor carpi ulnaris
Extensor digiti minimi
Extensor digitorum
Superficial layer:
11
Deep layer
Supinator
(superficial head)
Supinator
(deep head)
ulna
Innervation:
Posterior interosseous nerve
Abductor pollicis longus
Extensor pollicis longus
Extensor indicis
Extensor pollicis brevis
Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
12
Radial nerve
Deep branch
Posterior
interosseous artery
Common
interosseous artery
Ulnar artery
Posterior
interosseous nerve
Posterior
interosseous artery
Anterior
interosseous artery
Dorsal carpal arch
13
Hand
distal
middle
proximal
Phalanges
distal
proximal
Metacarpals
Capitate
Hamate
Pisiform
Trapezium
Carpal bones
Scaphoid
14
Carpal arch
Action
15
Ulnar artery
Median nerve
Ulnar nerve
Flexor digitorum
superficialis tendons
Flexor pollicis longus tendon
Flexor digitorum
profundus tendons
Radial artery
Flexor retinaculum
Carpal arch
Carpal tunnel
16
Extensor tendons at wrist
Extensor retinaculum
17
Extensor retinaculum
Ulna
Radius
18
Palmar aponeurosis
Triangular-shaped
condensation of deep fascia
Palmaris brevis
Innervation: superficial branch of ulnar nerve
19
Anatomical snuffbox
1. Radial artery
2. Cephalic vein
3. Superficial branch of radial nerve
Radial artery
Anatomical snuffbox
Extensor
pollicis longus
Cephalic vein
Extensor
pollicis brevis
Abductor
pollicis longus
20
Fibrous digital sheaths
21
Extensor hoods
(dorsal hoods)
(dorsal expansions)
Interphalangeal joints
Metacarpophalangeal joint
Contraction of
lumbricals and
interossei muscles
Flexed
Extended
22
Dorsal interossei
Abduction
Abduction
Complex flexion and
extension generated by
extensor hoods
Insertion into dorsal hood
Insertion into base of
proximal phalanx
Deep transverse
metacarpal ligament
23
Palmar interossei
Adduction
Adduction
Complex flexion and
extension generated by
extensor hoods
Insertion into dorsal hood
Deep transverse
metacarpal ligament
24
Adductor pollicis
Transverse head
Radial artery
(deep palmar arch)
Insertion:
Base of proximal phalanx
Dorsal hood
Oblique head
25
Flexor pollicis brevis
Thenar muscles
Extensor hood
Opponens pollicis
Abductor pollicis brevis
26
Flexor retinaculum
Flexor digiti minimi brevis
Hypothenar muscles
Opponens digiti minimi
Abductor digiti minimi
27
Lumbrical muscles
Deep transverse metacarpal ligament
Flex metacarpophalangeal joints
Extend interphalangeal joints
Attached to dorsal hood
Flexor digitorum
profundus tendon
28
Mainly ulnar artery
Mainly radial artery
Superficial palmar arch
Deep palmar arch
Ulnar artery
Radial artery
29
Proper palmar
digital arteries
Palmar metacarpal artery
Common palmar
digital arteries
Palmar digital artery
Superficial palmar arch
Ulnar artery
Radial artery
30
Radialis
indicis
artery
Palmar
metacarpal
arteries
Perforating
branch
Princeps
pollicis
artery
Dorsal
metacarpal
arteries
Dorsal carpal artery
Deep palmar arch
Radial artery
31
Dorsal venous network
Cephalic vein
Basilic vein
32
(Palmaris brevis)
Suoerficial branch
Palmar branch
Deep branch
Superficial branch
Ulnar nerve
Dorsal branch
33
3 thenar muscles
2 lumbricals (lateral)
Palmar branch
Digital nerves
Palmar branch
Median nerve
Recurrent branch
34
Anatomical
snuffbox
Superficial branch
of radial nerve
35