Wrist and Hand Flashcards
What are the boundaries of the anatomical snuff box
- Lateral: Abductor pollicis longus tendon & Extensor pollicis brevis tendon
- Medial: Extensor pollicis longus tendon
- Floor (proximal to distal): Styloid process of the Radius, Scaphoid bone, Trapezius, base of 1st digit metacarpal
Contents of the anatomical snuff box
- radial artery
- cephalic vein
Bones of the hand (proximal to distal)
1) carpal bones
2) metacarpals
3) proximal phalanges
4) middle phalanges
4) distal phalanges
Enumerate carpal bones
Some Lovers Try Positions That They Cant’ Handle
PROXIMAL (lateral to medial):
* scaphoid
* lunate
* triquetrum
* pisiform
DISTAL (lateral to medial)
* trapezium
* trapezoid
* capitate
* hamate
Forms the palm
Metacarpals
5 digits - base, body, head
(True/False)
Digits 2 to 5 have 3 phalanges (proximal, middle, & distal) while digit 1 has 2 phalanges (proxial & distal)
True
Distal Radio-ulnar joints
(articulation - ligaments - movement)
ARTICULATION:
* Head of ulna to ulnar notch of radius
* articular disc
LIGAMENTS:
* anterior and posterior ligaments
MOVEMENT:
* pronation
* supination
Wrist joint
Radiocarpal Joint
Radiocarpal joint
(articulation - ligaments - movment)
ARTICULATION:
* Distal radius to proximal carpal bones - except pisiform
LIGAMENTS
* anterior and posterior ligaments
* ulnar collateral ligament
* radial collateral ligament
MOVEMENTS:
* flexion & extension
* adduction & abduction
* circumduction
Carpal to carpal joint
Intercarpal joint
Joints between carpal and metacarpal bones
carpometacarpal and intermetacarpal joint
Joints of the hand (proximal to distal)
1) radio-ulnar joint
2) radiocarpal joint
3) intercarpal joint
4) carpometacarpal joint
5) intermetacarpal joint
6) metacarpophalangeal joint
7) interphalangeal joint
Hypothenar eminence
medial of the palm
- abductor digiti minimi
- flexor digiti minimi brevis
- opponens digiti minimi
The flexor retinaculum is a thickening of the deep fascia at the anterior surface of the hand. It forms the (1)
Important structures that passes through (2)
(1) osteofascial tunnel/carparl tunnel
(2) long flexor tendons of the wrist-thumb, and fingers, median nerve,
Structures that pass superficial to the flexor retinaculum
(medial to lateral)
* flexor carpi ulnaris tendon
* ulnar nerve
* ulnar artery
* palmar cutaneous branch of the ulnar nerve
* palmaris longus tendon
* palmar cutaneous branch of the median nerve
Structures that pass beneath the flexor retinaculum
(media to lateral)
* flexor digitorum superficialis tendons
* tendons of flexor digitorum profundus
* median nerve
* flexor pollicis longus tendon
* flexor carpi radialis tendon
A thickening of deep fascia that stretches across the back of the wrist
holds the long extenso tendons in position
Extensor Retinaculum
Creates 6 separate tunnels for the passage of long extensor tendons - separated by fibrous septa, each lined by synovial fluid
Structures that pass superficial to the extensor retinaculum
(medial to lateral)
* dorsal posterior cutaneous branch of the ulnar nerve
* basilic vein
* cephalic vein
* superficial branch of the radial nerve
Structures that pass deep to the extensor retinaculum
(medial to lateral)
* extensor carpi ulnaris tendon
* extensor digiti minimi tendon
* extensor digitorum & extensor indicis tendons
* extensor pollicis longus tendon
* extensor carpi radialis longus and brevis tendons
* abductor pollicis longus
* extendor pollicis brevis tendons
Nerve supply of the skin of the palm
- LATERAL: palmar cutaneous branch of the median nerve
- MEDIAL: palmar cutaneous branch of the ulnar nerve
- BASE of the thenar eminence: lateral cutaneous nerve of the forearm/superficial branch of the radial nerve
