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Anatomy > The arm > Flashcards

The arm Flashcards

1
Q

What nerves make up the brachial plexus?

A

C5-T1

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2
Q

What is the function of the anterior compartment of the arm?

A

Forearm flexion (C5-6)

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3
Q

What nerve supplies the anterior compartment of the arm?

A

Musculocutaneous

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4
Q

What muscles are found within the anterior compartment of the arm?

A

Biceps brachii
Coracobrachialis
Brachialis

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5
Q

What is the function of the posterior compartment of the arm?

A

Forearm extension (C7)

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6
Q

What nerve supplies the posterior compartment of the arm?

A

Radial

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7
Q

What muscles are found within the posterior compartment of the arm?

A

Triceps

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8
Q

What are the contents of the antecubital fossa?

A

Superficial: Median cubital vein

Deep: Radial nerve, brachial artery and median nerve

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9
Q

What is the function of the anterior compartment of the forearm?

A

Wrist and finger flexion (C7-8)

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10
Q

What nerve supplies the anterior compartment of the forearm?

A

Mostly median nerve

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11
Q

What muscles are found within the posterior compartment of the arm?

A

Superficial:

  • Pronator teres
  • Flexor carpi radialis
  • Palmaris longus
  • Flexor digitorum superficialis
  • Flexor carpi ulnaris (ulnar nerve)

Deep:

  • Flexor digitorum profundus (ulnar and median nerve)
  • Flexor pollicis longus
  • Pronator quadratus
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12
Q

What are the lateral borders of the anatomical snuff box?

A

Abductor pollicis longus

Extensor pollicis brevis

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13
Q

What is the medial borders of the anatomical snuff box?

A

Extensor pollicis longus

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14
Q

What is the proximal border of the anatomical snuff box?

A

Radial styloid process

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15
Q

What is the floor of the anatomical snuffbox?

A

Scaphoid and trapezium

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16
Q

What is the contents of the anatomical snuffbox?

A

Radial artery
Cephalic vein
Dorsal cutaneous branch of radial nerve

17
Q

What are the borders of the carpal tunnel?

A

Flexor retinaculum

Carpal bones

18
Q

What are the insertion points of the flexor retinaculum?

A

Radially: Scaphoid tubercle, ridge of trapezium

Ulna side: Pisiform and hook of hamate

19
Q

What is the contents of the carpal tunnel?

A

4 tendons of flexor digitorum profundus
4 tendons of flexor digitorum superficialis
1 tendon of flexor policies longs
Median nerve

20
Q

What does the median nerve supply?

A 
The LLOAF muscles:
Lateral 2 Lumbricals
Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis
21
Q

Why is there thenar sparing in carpal tunnel syndrome?

A

The palmar cutaneous branch travels superficial to the flexor retinaculum –> spared sensation

Anatomy (11 decks)

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