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Anatomy > Forearm/Wrist/Hand > Flashcards

Forearm/Wrist/Hand Flashcards

1
Q

Palmar carpal ligament

A

Most superficial ligament across the “wrist”

Is continuous with the extensor reticulum

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2
Q

Transverse carpal ligament

A

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

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3
Q

Extensor retinaculum

A

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

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4
Q

Thenar compartments

A

Contains muscles that move the thumb

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5
Q

Adductor pollicis compartment

A

Separate space deep to thenar compartment (thin fascia)

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6
Q

Hypothenar compartment

A

Contains muscles that move the pinky

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7
Q

Central (midpalmar) compartment

A

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

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8
Q

Superficial layer of muscles in posterior of forearm

A

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

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9
Q

Common extensor tendon

A

Extensor— carpi radialis brevis, digiti minimi, carpi ulnaris

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10
Q

Brachoradialis

A

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

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11
Q

Extensor Carpi radialis longus

A

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

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12
Q

Extensor Carpi radialis brevis

A

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

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13
Q

Intertendinous connections

A

Link adjacent tendons to MP joint

Unable to fully isolate digits 2-5 when extensor digitorum is sole mover

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14
Q

Extensor expansion

A

Flattening/widening of extensor digitorm tendons as passes MP joint

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15
Q

Extensor digiti minimi

A

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

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16
Q

Extensor carpi ulnaris

A

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

17
Q

Tennis elbow

A

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

18
Q

Deep layers of the posterior forearm

A

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

19
Q

Supinator

A

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

20
Q

Extensor indicis

A

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

21
Q

Abductor pollicis longus

A

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

22
Q

Extensor pollicis longus

A

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
Q

Extensor pollicis brevis

A

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

24
Q

Anatomical snuff box

A

Area between tendons of extensor policies brevis/longus

Radial artery passes through the floor of this box (Scaphoid bone)

25
Q

Dorsal Interossei

A

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
Q

Pronator Teres

A

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

27
Q

Flexor carpi radialis

A

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

28
Q

Palmaris longus

A

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

29
Q

Flexor Carpi ulnaris

A

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

30
Q

Flexor digitorum superficialis

A

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
Q

Flexor digitorum profundus

A

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

32
Q

Flexor pollicis longus

A

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

33
Q

Pronator Quadratus

A

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

Anatomy (35 decks)

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