Hand

Question 1

Flexor retinaculum KNOW this!

Answer 1

it’s in your paperwork

Question 2

What are the four compartments of the hand?

Answer 2

Thenar, hypothenar, central, adductor-interosseus

Question 3

What three intrinsic muscles are in the thenar compartment

Answer 3

opponens pollicis, flexor pollicis brevis, abductor pollicis brevis

Question 4

What three intrinsic muscles are in the hypothenar compartment?

Answer 4

opponens digiti minimi, flexor digiti minimi, abductor digiti minimi

Question 5

What is in the central compartment of the hand?

Answer 5

Tendons of the long digital flexors plus the lumbrical muscles (1-4)

Question 6

What is in the adductor-nterosseus compartment of the hand?

Answer 6

adductor pollicis and 7 interosseous muscles.

Question 7

What innervates the thenar compartment muscles of the hand?

Answer 7

Recurrent branch of the medial nerve

Question 8

What innervates the muscles of the hypothenar compartment?

Answer 8

Deep branch of the ulnar nerve

Question 9

What innervates the contents of the Central compartment of the hand?

Answer 9

Lumbrical muscles 1 &2 are innervated by the anterior interosseous branch of median nerve
3&4 are innervated by deep ulnar nerve

Question 10

opponens pollicis origin

Answer 10

Ridge of trapezium

Question 11

opponens pollicis insertion

Answer 11

Radial side of 1st metacarpal

Question 12

opponens pollicis nerve

Answer 12

Recurrent branch of median nerve

Question 13

opponens pollicis action

Answer 13

Opposes thumb towards center of palm by flexing and rotating it medially

Question 14

Flexor pollicis brevis origin

Answer 14

Superficial head- common with opponens pollicis (ridge of trapezium)
Deep head- Trapezoid and capitate

Question 15

flexor pollicis brevis insertion

Answer 15

radial base of proximal phalanx of digit one

Question 16

flexor pollicis brevis nerve

Answer 16

Recurrent branch of median

Question 17

flexor pollicis brevis action

Answer 17

Flexes thumb at metacarpophalangeal joint

Question 18

Abductor pollicis brevis origin

Answer 18

Scaphoid and trapezium

Question 19

abductor pollicis brevis insertion

Answer 19

Radial base of proximal phalanx of digit 1

Question 20

abductor pollicis brevis nerve

Answer 20

recurrent branch of median nerve

Question 21

abductor pollicis brevis action

Answer 21

abducts thumb and assists in opposition

Question 22

Opponens digiti minimi origin

Answer 22

Hook of hamate

Question 23

opponens digiti minimi insertion

Answer 23

Medial(ulnar) side of the 5th metacarpal

Question 24

opponens digiti minimi nerve

Answer 24

Deep branch of ulnar nerve

Question 25

opponens digiti minimi action

Answer 25

opposes digiti minimi toward center of palm by flexing and rotating it laterally

Question 26

flexor digiti minimi brevis origin

Answer 26

hook of hamate

Question 27

flexor digiti minimi brevis insertion

Answer 27

ulnar(medial) base of proximal phalanx on digit 5

Question 28

flexor digiti minimi brevis nerve

Answer 28

Deep branch of ulnar nerve

Question 29

flexor digiti minimi brevis action

Answer 29

flexes digit 5 at MP joint

Question 30

Lumbricals origin

Answer 30

Flexor digitorum profundus tendons

Question 31

Lumbricals insertion

Answer 31

Lateral (radial) sides of Extensor expansion

Question 32

Lumbricals nerve

Answer 32

1&2 Median | 3&4 Deep ulnar

Question 33

Lumbricals action

Answer 33

each flexes digit at Metacarpophalangeal joint and extends digits at PIP and DIP joints (bye bye muscle)

Question 34

Palmar interossei origin

Answer 34

Origin- digits 4&5 radial side of metacarpals Digit 2 ulnar side of metacarpals

Question 35

Palmar interossei insertion

Answer 35

Extensor expansion and base of proximal phalanx of the appropriate digit

Question 36

Palmar interossei nerve

Answer 36

deep ulnar

Question 37

Palmar interossei action

Answer 37

Draws it's digit toward digit 3 AKA adducts

Question 38

Adductor pollicis origin

Answer 38

Oblique head- bases of metacarpals 2&3, the capitate and other central carpal bones Transverse head-body of metacarpal 3

Question 39

Adductor pollicis insertion

Answer 39

Medial side of base of proximal phalanx of thumb.

Question 40

Adductor pollicis nerve

Answer 40

Deep ulnar

Question 41

Adductor pollicis action

Answer 41

Adducts thumb toward digit 3

Question 42

Dorsal interossei origin

Answer 42

Adjacent sides of metacarpals(bipennate, feather like)

Question 43

dorsal interossei insertion

Answer 43

Extensor expansion and base of the proximal phalanx of the appropriate digit.

Question 44

dorsal interossei nerve

Answer 44

deep ulnar

Question 45

dorsal interossei action

Answer 45

draw that digit away from digit 3 AKA abduct