Instrinsic muscles

Question 1

Intrinsic muscles

Answer 1

originate and insert in the hand

Question 2

Muscles of the Thenar Eminence

Answer 2

Flexor pollicis brevis, abductor pollicis brevis, opponens pollicis

Question 3

Muscles of the Hypothenar eminence

Answer 3

Abductor digit minimi manus, flexor digiti minimi manus, oppenens digiti minimi

Question 4

muscles of the central compartment

Answer 4

Adductor pollicis, lumbricals, palmar interossei, dorsal interossei

Question 5

ABductor Pollicis Brevis attachment

Answer 5

Flexor Retinaculum,scaphoid & Trapezium ->

proximal phalanx of the thumb (lateral side)

Question 6

Abductor pollicis brevis does what

Answer 6

Abducts the thumb @ CMC and MCP joint

Question 7

Flexor Pollicis Brevis attachments

Answer 7

Flexor Retinaculum & Trapezium -> proximal phalanx of the thumb (lateral) radial side

Question 8

what does the flexor pollicis Brevis do

Answer 8

Flexes the thumb (1st metacarpal) @ CMC and MCP joint

Question 9

Opponens Pollicis attachments

Answer 9

Flexor Retinaculum & trapezium ->
entire radial (lateral) border of first metacarpal (thumb)

Question 10

what opposes the thumb

Answer 10

Opponens Pollicis CMC Opposition

Question 11

Abductor Digiti Minimi Manus attachments

Answer 11

Pisiform & tendon of the flexor carpi ulnaris ->

proximal phalanx of little finger (medial/ulnar side)

Question 12

what does the Abductor Digiti Minimi Manus do

Answer 12

Abducts the little finger (5th metacarpal) @ MCP joint

Question 13

Flexor Digiti Minimi Manus do

Answer 13

Flexes little finger (5th metacarpal) @ MCP joint

Question 14

Flexor Digiti Minimi Manus attachments

Answer 14

Flexor Retinaculum & hook of hamate ->

proximal phalanx of little finger (ulnar/ medial side)

Question 15

Opponens Digiti Minimi attachments

Answer 15

Flexor Retinaculum & hamate ->

entire length of palmar surface of 5th metacarpal (small finger)

Question 16

What does the Opponens Digiti Minimi do

Answer 16

Opposes Little Finger (5th metacarpal) @ CMC joint

Question 17

Which muscle of the Thenar and Hypothenar group of muscles does not attach to the flexor retinaculum

Answer 17

Abductor digiti Minimi Manus

Question 18

Adductor Pollicis attachments

Answer 18

oblique head: base of 2nd the 3rd metacarpal & capitate
transverse head: anterior surface 3rd metacarpal ——>
medial side of the proximal phalanx of the thumb
(2 heads coverage & inserted by a tendon containing a sesmoid bone)

Question 19

what does the Adductor Pollicis do

Answer 19

Thumb Adduction @ CMC and MCP joint

Question 20

Radial Artery passes through two heads of what muscle

Answer 20

Adductor Pollicis

Question 21

what are the lumbrical manus attachments

Answer 21

distal tendons of flexor digitorum profundus ->

distal tendons of extensor Digitorum

Question 22

“rooftop” muscle

Answer 22

lumbrical manus

Question 23

Only muscle with no bony attachment

Answer 23

lumbrical manus

Question 24

what does the Lumbrical Manus do

Answer 24

EXTEND FINGERS 2-5 @ PIP AND DIP

FLEXES FINGERS 2-5 @ MCP JOINT

Question 25

palmar interossei attachment

Answer 25

palmar surface metacarpal 2,4,5 -> base proximal phalanges 2, 4,5 on “middle finger” side

Question 26

palmar interossei does what

Answer 26

Adducts fingers 2,4,5 @ MCP joint PAD: palmar adduction

Question 27

dorsal interossei attachments

Answer 27

metacarpals 1-5 -> base proximal phalanx 2,3 &4 side that faces away from the center of middle finger

Question 28

dorsal interossei does what

Answer 28

DAB:Dorsal Abducts

Abducts fingers 2-4 @ MCP joint

Question 29

Unipennate

Answer 29

palmar interossei

Question 30

Bipennate

Answer 30

dorsal interossei / fibers running in each direction

Question 31

palmar interossei
index finger is at what aspect:
Ring finger is at what aspect:
Small finger is at what aspect:

Answer 31

index: ulnar aspect
ring finger: radial aspect
Small finger: radial aspect