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Limbs > Forearm > Flashcards

Forearm Flashcards

1
Q

Name the 7 superficial posterior forearm muscles (extensors, supination)

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

Which 3 muscles in the superficial posterior compartment are known as the mobile wad and why

A

Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis

Move together in supination and pronation

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3
Q

What are the

  • attachments
  • innervation
  • action of the superficial posterior compartment muscles
  • extensor digitorum
  • extensor digiti minimi
  • extensor carpi ulnaris
  • extensor carpi radialis longus
  • extensor carpi radialis brevis
  • brachioradialis
  • anconeus
A

Extensor digitorum

  • lat epicondyle => fingers
  • extends fingers at MCP, IP
  • radial

Extensor digiti minimi

  • lat epicondyle => little finger
  • extends little finger, wrist extension
  • radial

Extensor carpi ulnaris

  • lat epicondyle => MB5
  • extends, adducts wrist
  • radial

Extensor carpi radialis longus
-lat supracondyle => MBII

Extensor carpi radialis brevis

  • lat epicondyle => MBIII
  • extends, abduct wrist
  • radial

Brachioradialis

  • lat epicondyle => distal radius
  • flex elbow
  • radial

Anconeus

  • lat epicondyle => post lat olecranon
  • extend elbow
  • radial
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4
Q

Name the 5 muscles in the deep posterior muscle compartment of the forearm

A 
Supination
Extensor indicis 
Extensor pollicis brevis
Extensor pollicis longus
Abductor pollicis longus
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5
Q

Describe the

  • attachments
  • innervations
  • actions of the deep posterior muscles
  • Supinator
  • Extensor indicis
  • Extensor pollicis longus
  • Extensor pollicis brevis
  • Abductor pollicis longus
A

Supinator

  • lat epicondyle and ulna => post radius
  • supinate forearm
  • radial

Extensor indicis

  • IOM, post radius ulna => lat MBI
  • abduct thumb
  • radial

Extensor pollicis longus

  • IOM, post ulna => DPI
  • extends MCP, CM, IP
  • radial

Extensor pollicis brevis

  • IOM, post radius => PPI
  • extends MCP, CM
  • radial

Abductor pollicis longus

  • IOM, post radius => lat MB1
  • abducts thumb
  • radial
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6
Q

What is the anatomical snuffbox

Describe the structures found in it

A

Tendons (extensor pollicis longus, extensor pollicis brevis from deep post comp)

Radial nerve and artery found in between

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7
Q

Describe the route of the radial nerve

What is the innervation of the radial nerve

A

C5-T1

Posterior arm comp
Anterior in elbow joint
Posterior forearm comp

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8
Q

Describe the route of the arteries from the arm => forearm => hands => fingers

A

Brachial
Radial and ulnar => common interosseous => ant and post interosseous

All lead to deep and superficial palmar arch => digital arteries

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9
Q

What artery supplies the superficial and deep extensor muscles

A

Posterior interosseous

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10
Q

Name the 4 superficial anterior forearm muscles (flexors)

A

Pronator teres
Palmaris longus
Flexor carpi radialis
Flexor carpi ulnaris

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11
Q

What are the

  • attachments
  • innervation
  • actions of the superficial anterior forearm muscles
  • Pronator teres
  • Palmaris longus
  • Flexor carpi ulnaris
  • Flexor carpi radialis
A

Pronator teres

  • med epicondyle and coronoid process => mid radius
  • forearm pronation
  • median

Palmaris longus

  • med epicondyle => flexor retinaculum
  • wrist flexion
  • median

Flexor carpi radialis

  • med epicondyle => MB II, III
  • flex, abduct
  • median

Flexor carpi ulnaris

  • med epicondyle => pisiform
  • flex, adduct
  • ulnar
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12
Q

Name the 1 intermediate anterior forearm muscle (flexor)

A

Flexor digitorum superficialis

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13
Q

What is the

  • attachment
  • innervation
  • action of the intermediate anterior muscle (flexor)

-flexor digitorum superficialis

A

Flexor digitorum superficialis

  • med epicondyle => MP of fingers
  • MCP, PIP flexion, wrist flex
  • median
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14
Q

Name the 3 deep anterior forearm compartment muscles

A

Flexor digitorum profundus
Flexor pollicis longus
Pronator quadratus

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15
Q

What is the

  • attachment
  • innervation
  • actions associated with the deep anterior forearm muscles
  • flexor digitorum profundus
  • flexor pollicis longus
  • pronator quadratus
A

Flexor digitorum profundus

  • IOM, ulna => DP of fingers
  • DIP, MCP wrist flex
  • Medial half => ulnar. Lateral half => median

Flexor pollicis longus

  • IOM, radius => DPB I
  • IP, MCP flex
  • Median

Pronator quadratus

  • ulna => radius
  • forearm pronation
  • median
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16
Q

How would you locate the median and ulnar nerve in the wrist

A

Median, between PL and FCR

Ulnar, on radial side of FCU

17
Q

Name the 3 main structures that pass through the carpal tunnel

A

Median nerve
FDP
FDS

18
Q

How would you locate the ulnar nerve and artery

A

Between hamate hook and pisiform in Guyon canal

19
Q

Describe the route of the median nerve
What is its innervation

Describe the route of the ulnar nerve
What is its innervation

A

Median (C5-T1)
Anterior of arm => anterior of forearm => palmar of hand

Ulnar (C8-T1)
Medial of arm => posterior to med epicondyle => anterior of forearm => palmar of hand

20
Q

Which arteries can be palpated for a pulse

A

Radial

Ulnar

21
Q

Describe the superficial venous drainage

A

Superficial palmar arch
Median and cephalic

Cephalic => median cubital => basilic => subclavian
Cephalic => subclavian

Median => basilic => subclavian

22
Q

Describe the deep venous drainage

A

Superficial and deep venous => radial and ulnar => brachial

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