Forearm/Wrist/Hand Flashcards Preview

Anatomy > Forearm/Wrist/Hand > Flashcards

Flashcards in Forearm/Wrist/Hand Deck (33):
1

Palmar carpal ligament

Most superficial ligament across the "wrist"
Is continuous with the extensor reticulum

2

Transverse carpal ligament

(Flexor retinaculum) deep to palmar carpal ligament
Attaches to tubercles of scaphoid and trapezium and hook of hamate/pisiform
Forms the carpal tunnel

3

Extensor retinaculum

Dorsal "wrist", forms the 6 separate tunnels for the extensor/abductor tendons
Is fairly snug to wrist bones

4

Thenar compartments

Contains muscles that move the thumb

5

Adductor pollicis compartment

Separate space deep to thenar compartment (thin fascia)

6

Hypothenar compartment

Contains muscles that move the pinky

7

Central (midpalmar) compartment

Between thenar/hypothenar compartments, deep to palmar aponeurosis
Contains flexor tendons/synovial sheaths/lumbricals/ superficial palmar arch

8

Superficial layer of muscles in posterior of forearm

1) Brachoradialis 2&3) Extensor carpi radialis longus/brevis 4) Extensor digitorum 5) Extensor digiti minimi 6) Extensor carpi ulnar

9

Common extensor tendon

Extensor— carpi radialis brevis, digiti minimi, carpi ulnaris

10

Brachoradialis

O: supracondylar ridge
Passes anterior to elbow joint, inserts on radius
A: elbow flexion

11

Extensor Carpi radialis longus

O: Supracondylar ridge
I: base of index finger metacarpal
A: extends/abducts wrist

12

Extensor Carpi radialis brevis

I: base of middle finger metacarpal
A: extends/abducts wrist

13

Intertendinous connections

Link adjacent tendons to MP joint
Unable to fully isolate digits 2-5 when extensor digitorum is sole mover

14

Extensor expansion

Flattening/widening of extensor digitorm tendons as passes MP joint

15

Extensor digiti minimi

I: separate tendon to little finger hood
A: extends all little finger joints

16

Extensor carpi ulnaris

I: base of pinky metacarpal base
A: extends/adducts wrist

17

Tennis elbow

Inflammation in ECRB due to repetitive wrist stabilization while forcefully extending the elbow

18

Deep layers of the posterior forearm

1)Supinator 2)Extensor indicis 3)Abductor pollicis longus 4&5) Extensor pollicis longus/brevis

19

Supinator

O: lateral epicondyle of humerus
I: upper part of radius
A: Supination
Deep branch of radial nerve passes deep to it

20

Extensor indicis

O: lower part of ulna
I: tendon joints extensor digitorum to index finger
A: extends all index joints

21

Abductor pollicis longus

O: Interosseous area
I: base of thumb metacarpal
A: abducts/helps extend CMC joint of thumb

22

Extensor pollicis longus

O: Interosseous membrane/ulna
I: around the dorsal radial tubercle and into the base od the distal phalanx of thumb
A: extends all joints of the thumb

23

Extensor pollicis brevis

O: interosseous membrane/radius
I: Base of proximal phalanx of thumb
A: Extends CMC/MP of thumb

24

Anatomical snuff box

Area between tendons of extensor policies brevis/longus
Radial artery passes through the floor of this box (Scaphoid bone)

25

Dorsal Interossei

4 muscles arise by 2 heads from MC bases
I: extensor expansions
A: abducts finger, aids in lumbrical flex of MP and exten of IP

26

Pronator Teres

O: humerus and ulna head
I: midshaft radius (distal to supinator)
A: Pronates forearm/hand

27

Flexor carpi radialis

O: Common tendon
I: Base of 2nd metacarpal
A: flexes/abducts wrist

28

Palmaris longus

*Not always present
O: common tendon
I: Palmar aponeurosis
A: flexes wrist

29

Flexor Carpi ulnaris

O: 2 heads
I: Pisiformis, but continues via piso-hamate/metacarpal ligaments
A:Flexes/adducts wrist
*Ulnar nerve passes b/t 2 heads

30

Flexor digitorum superficialis

O: Common flexor tendon
I: splits to insert into middle phalanges of 2-5 fingers
A: Flexes wrist/MP/PIP joints of 2-5 fingers (NOT DIP)
*Medial nerve courses deep to it

31

Flexor digitorum profundus

O: Ulna/Interosseous membrane
I: Distal phalanges of 2-5 fingers
A: flexes all finger joints and wrist

32

Flexor pollicis longus

O: radius/Interosseous membrane
I:distal phalanx of the thumb
A: Flexes all joints of the thumb

33

Pronator Quadratus

*Distal portion of the forearm
O:ulna
I: Lateral radius
A: pronation