Muscles of the Upper Limb Flashcards Preview

Anatomy (Karen) > Muscles of the Upper Limb > Flashcards

Flashcards in Muscles of the Upper Limb Deck (32):
1

What muscles attach the shoulder girdle to the thoracic wall?

  • pec major
  • pec minor
  • subclavius
  • serratus anterior

2

Division of the long scapular nerve results in

winged scapula

3

Which muscles attach the humerus to the scapula?

  • deltoid
  • subscapularis
  • supraspinatus
  • infraspinatus
  • teres minor
  • teres major

4

What is the common flexor origin for muscles of the superficial forearm?

anterior aspect of the medial epicondyle

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5

What are the muscles of the superficial anterior forearm compartment?

  • pronator teres
  • flexor carpi radialis
  • palmaris longus
  • flexor carpi ulnaris

6

What muscle forms the middle layer of the anterior forearm comparmtent?

Flexor digitorum superficialis

7

What are the muscles of the deep anterior forearm compartment?

  • flexor digitorum profundus (medial)
  • flexor pollicis longus (lateral)
  • pronator quadratus

8

Tendons of flexor digitorum profundus pass through the carpal tunnel

as the bottom layer, side by side (4)

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9

Tendons of flexor digitorum superficialis pass through the carpal tunnel

2x2:

3rd and 4th finger superficial

4th and 5th finger deep (intermediate layer, on top of 4 FDP tendons)

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10

Flexor carpi radialis tendon travels distally

through a split in the lateral flexor retinaculum, not through the carpal tunnel

(over the carpal tunnel, under the flexor retinaculum)

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11

What structures travel through the carpal tunnel?

  • FDP tendons (4)
  • FDS tendons (4)
  • FPL tendon (1)
  • median nerve, between FDP and FDS tendons
  • FCU tendon travels over carpal tunnel under the flexor retinaculum

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12

At the wrist, the median nerve travels

through the carpal tunnel between the tendons of FDP and FDS

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13

Which tendons do not pass through the carpal tunnel?

FCU and FCR

14

At the wrist, the flexor carpi ulnaris tendon travels

over the carpal tunnel to the pisiform bone, inserts onto the base of the 5th metacarpal via the pisometacarpal ligament

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15

Muscles of the superficial posterior forearm compartment are

  • brachioradialis
  • extensor carpi radialis longus
  • extensor carpi radialis brevis
  • extensor digitorum
  • extensor digiti minimi
  • extensor carpi ulnaris
  • abductor pollicis longus
  • abductor pollicis brevis
  • extensor pollicis longus

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16

What is the common extensor origin of the forearm muscles?

lateral epicondyle

except for brachioradialis and extensor carpi radialis longus which originate at the lateral supracondylar ridge

17

What tendons form the anatomical snuffbox?

abductor pollicis longus and extensor policis brevis (closer to palmar edge of thumb)

extensor pollicis longus (more dorsal)

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18

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19

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20

What muscles comprise the thenar eminence?

  • abductor pollicis brevis
  • flexor pollicis brevis
  • opponens pollicis

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21

What muscles comprise the hypothenar eminence?

  • abductor digiti minimi
  • flexor digiti minimi
  • opponens digiti minimi

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22

Which artery forms the superficial palmar arch?

ulnar; completed by radial

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23

Which artery gives off the deep palmar arch?

radial; completed by ulnar

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24

What are the 7 layesr of the palm?

  • skin and palmaris brevis
  • palmar aponeurosis
  • thenar and hypothenar muscles
  • neurovascular plane
  • long flexor tendons and lumbricals
  • adductor pollicis and neurovascular plane
  • interossei and metacarpals

25

The fibrous sheaths on the palmar surface extend from

the metacarpal head to the distal phalanges

26

What are the synovial sheaths of the hand?

  • line the fibrous sheaths
  • extend from proximal wrist to distal tips of fingers
    • thumb and 5th finger extends the whole way to terminal phalanx
    • interruption in middle 3 fingers where lumbricals arise
      • sheath ends just distal to flexor retinaculum
      • starts again at phalanges

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27

Which lumbrical muscles are unicipital? Bicipital?

  • 1st and 2nd are unicipital
  • 3rd and 4th are bicipital

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28

Lumbrical muscles

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29

Where do the lumbrical muscles insert?

extensor expansions

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30

Where do the interossei insert?

extensor expansions

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31

Palmar interossei

adduct fingers from midline

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32

Dorsal interossei

abduct the fingers

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