Upper limb 4 Flashcards

1
Q

Superficial layer of muscles in posterior forearm (6)

A
Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris
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2
Q

Functions of ECRL + ECRB (2)

A

Both extend + abduct wrist

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3
Q

Deep layer of muscle in posterior forearm (1)

A

Supinator

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4
Q

Outcropping of deep layer of muscles in posterior forearm (4)

(think snuffbox)

A

Abductor pollicis longus
Extensor pollicis longus
Extensor pollicis brevis
Extensor indicis

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5
Q

Functions of extensor digitorum (2)

A

Extend medial 4 digits

Extend wrist

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6
Q

Functions of

  • Abductor pollicis longus (3)
  • Extensor pollicis longus (3)
  • Extensor pollicis brevis (2)
  • Extensor indicis
A

Abduct thumb, extend thumb at CMC joint, extend wrist

Extend IP + MCP of thumb, extend wrist

Extend MCP of thumb, extend wrist

Extend index finger

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7
Q

Innervation of all muscles in posterior forearm

A

Radial

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8
Q

Function of extensor digiti minimi

A

Extend 5th finger at MCP

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9
Q

Function of extensor carpi ulnaris

A

Extend + adduct wrist

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10
Q

Function of brachioradialis

A

Weak flexion of elbow

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11
Q

Function of supinator

A

Supinate forearm

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12
Q

Posterior interosseous nerve is a deep branch of

A

radial nerve

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13
Q

Radial nerve divides into superficial and deep branches in the cubital fossa

What does the superficial branch supply

A

Sensation to dorsum of hand

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14
Q

Pathology found in the dorsum of wrist

A

Synovial cyst/ganglion

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15
Q

What deep muscles of the posterior forearm act on the thumb

A

APL
EPL
EPB

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16
Q

What muscles form the medial and lateral boundary of the anatomical snuffbox

A

Medial - EPL

Lateral - APL + EPB

17
Q

What is the anatomical snuffbox

A

Shallow depression on lateral aspect of wrist on the dorsum

18
Q

What 2 carpal bones can you feel in the anatomical snuffbox

A

Scaphoid

Trapezium

19
Q

What artery is in the floor of the anatomical snuffbox

A

Radial artery

20
Q

In the snuffbox, the scaphoid and radius articulate to form part of the wrist joint

A blow to the wrist usually puts most force on what bone leading to fracture

A

scaphoid fracture

21
Q

The 4 tendons of extensor digitorum flatten to form

A

extensor expansion - triangular aponeurosis

22
Q

Muscles attaching to the dorsal extensor expansion (5)

A
Extensor digitorum
Lumbricals
Extensor indicis
Dorsal interossei
Palmar interossei
23
Q

Action of APL on wrist

A

Extension

24
Q

Actions of APL on thumb (2)

A

Abduct thumb, extend thumb at CMC joint,