MSK - Upper Limb 2 Flashcards

1
Q

What cord does the ulnar nerve arise from and what does it innervate

A
  • Medial cord
  • Flexor carpi ulnaris
  • Medial half of flexor digitorum profundus
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2
Q

3 common sites of humerus where 3 nerves could be injured

A
  • Radial groove = radial nerve
  • Medial epicondyle = ulnar nerve
  • Surgical neck = Axillary nerve
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3
Q

Medial and lateral borders of the cubital fossa and its contents

A
  • Medial = Pronator teres
  • Lateral = Brachioradialis
  • Brachial a (radial + ulnar)
  • Biceps brachii tendon
  • Median n.
  • Median cubital vein
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4
Q

2 processes of the unla

A
  • Olecranon

- Coronoid

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5
Q

Action of triceps and anconeus muscles on elbow joint and their innervation

A
  • Extension

- Radial nerve

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6
Q

What cord forms the radial nerve and what doe sit innervate

A
  • Posterior cord

- All extensors at elbow + wrist joint

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7
Q

What blood vessel does the radial nerve run along and what’s the segmental value of it

A
  • Profunda brachii

- C5-T1

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8
Q

What nerve is most likely to be damaged by a midshaft humeral fracture and what would it look like

A
  • Radial nerve

- Wrist drop

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9
Q

Flexors and extensors at the elbow joint

A

Flexors

  • Biceps brachii
  • Brachialis
  • Brachioradialis

Extensors

  • Triceps
  • Anconeus
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10
Q

What type of joint isthe radio-ulnar joint and what ligament supports it and how

A
  • Pivot synovial joint
  • Annular ligament
  • Froms a collar and holds head of radius
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11
Q

Muscles responsible for supination and pronation and their innervation

A

Supination

  • Biceps brachii (musculocutaneous n.)
  • Supinator (radial n.)

Pronation

  • Pronator quadratus (median n.)
  • Pronator teres (median n.)
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12
Q

Most powerful supinator and pronator of the forearm

A
  • Supinator = Biceps brachii

- Pronator = Pronator teres

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13
Q

What do the anterior muscles of the forearm do

A
  • Flex wrist and digits

- Pronate forearm

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14
Q

4 muscels of the superficial group of the anterior forearm and their innervation

A
  • Pronator teres (median n.)
  • Flexor carpi radialis (median n.)
  • Palmaris longus (median n.)
  • Flexor carpi ulnaris (ulnar n.)
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15
Q

What muscles abduct and adduct the wrist

A
  • Adduction = Flexor carpi ULNARIS

- Abduction = Flexor carpi RADIALIS

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16
Q

Action + innervation of brachioradilais

A
  • Flexes elbow
  • Supination
  • Radial n. (exception to radial n. supplies extensors)
17
Q

Innervation and action of flexor digitorum superficialis

A
  • Median n.

- Flex wrist, metacarpalphalangeal joint and interphalangeal joint

18
Q

Where do flexor digitorum profundus, flexor pollicus longus and pronator quadratus lie

A
  • Flexor digitorum profundus = Ulna
  • Flexor pollicus longus = Radius
  • Pronator teres = Between distal parts of both bones
19
Q

Action + innervation of flexor digitorum profundus

A
  • Flexes distal phalanges + wrist

- Ulanr n. (medial part, digits 4+5) + Median n. (lateral part, digits 2+3)

20
Q

Action + innervation of flexor pollicus longus

A
  • Flexes thumb

- Median n.

21
Q

Action + innervation of pronator quadratus

A
  • Pronation

- Median n.

22
Q

What does the medial n. supply and what 2 muscles does it not supply

A

-Supplies the anterior compartment of the forearm (mostly)
Doesnt’t supply
-Flexor carpi ulnaris
-Medial half of Flexor Digitorum Profundus

23
Q

How does the median n. enter the hand

A

Via carpal tunnel (under flexor retinaculum)

24
Q

Relationship between the ulnar n. + a.

A

Distal = Ulnar n. is medial to ulnar artery

25
Q

Contents of carpal tunnel

A
  • Median n.
  • Flexor digitorum superficialis (4 tendons)
  • Flexor digitorum profundus (4 tendons)
  • Flexor pollicuslongus (1 tendon)
26
Q

What muscle of the forearm is continuous with the palmar fascia

A

Palmaris longus

27
Q

5 compartments of the hand

A
  • Thenar
  • Hypothenar
  • Adductor
  • Central (lumbricals and long flexor tendons)
  • Interosseous
28
Q

3 muscles of the thenar eminence and their innervation

A
  • Abductor pollicis brevis
  • Flexor pollicus brevis
  • Opponens pollicis

-Median nerve

29
Q

3 muscles of the hypothenar eminence

A
  • Abductor digiti minimi
  • Flexor digiti minimi
  • Opponens digiti minimi

-Ulnar nerve

30
Q

Innervation of adductor pollicis

A

-Ulnar nerve