Muscles of the Upper Limb Flashcards
What muscles attach the shoulder girdle to the thoracic wall?
- pec major
- pec minor
- subclavius
- serratus anterior
Division of the long scapular nerve results in
winged scapula
Which muscles attach the humerus to the scapula?
- deltoid
- subscapularis
- supraspinatus
- infraspinatus
- teres minor
- teres major
What is the common flexor origin for muscles of the superficial forearm?
anterior aspect of the medial epicondyle
What are the muscles of the superficial anterior forearm compartment?
- pronator teres
- flexor carpi radialis
- palmaris longus
- flexor carpi ulnaris
What muscle forms the middle layer of the anterior forearm comparmtent?
Flexor digitorum superficialis
What are the muscles of the deep anterior forearm compartment?
- flexor digitorum profundus (medial)
- flexor pollicis longus (lateral)
- pronator quadratus
Tendons of flexor digitorum profundus pass through the carpal tunnel
as the bottom layer, side by side (4)
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)
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)
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
At the wrist, the median nerve travels
through the carpal tunnel between the tendons of FDP and FDS
Which tendons do not pass through the carpal tunnel?
FCU and FCR
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
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
What tendons form the anatomical snuffbox?
abductor pollicis longus and extensor policis brevis (closer to palmar edge of thumb)
extensor pollicis longus (more dorsal)
What muscles comprise the thenar eminence?
- abductor pollicis brevis
- flexor pollicis brevis
- opponens pollicis
What muscles comprise the hypothenar eminence?
- abductor digiti minimi
- flexor digiti minimi
- opponens digiti minimi
Which artery forms the superficial palmar arch?
ulnar; completed by radial
Which artery gives off the deep palmar arch?
radial; completed by ulnar
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
Which lumbrical muscles are unicipital? Bicipital?
- 1st and 2nd are unicipital
- 3rd and 4th are bicipital
Lumbrical muscles
Where do the lumbrical muscles insert?
extensor expansions
Where do the interossei insert?
extensor expansions
Palmar interossei
adduct fingers from midline
Dorsal interossei
abduct the fingers
