Hand

Question 1

Opponens Pollicis origin?

Answer 1

tubercle of the trapezium, and the associated flexor retinaculum.

Question 2

Opponens Pollicis distal?

Answer 2

lateral surface of the first metacarpal

Question 3

Opponens Pollicis innervation?

Answer 3

median n

Question 4

Opponens Pollicis action?

Answer 4

Opposes the thumb, by medially rotating and flexing metacarpal on trapezium.

Question 5

Abductor Pollicis Brevis origin?

Answer 5

tubercles of the scaphoid and trapezium; flexor retinaculum

Question 6

Abductor Pollicis Brevis distal?

Answer 6

lateral side of proximal phalanx of the thumb

Question 7

Abductor Pollicis Brevis innervation?

Answer 7

median n

Question 8

Abductor Pollicis Brevis action?

Answer 8

Abducts the thumb

Question 9

Flexor Pollicis Brevis origin?

Answer 9

tubercle of the flexor retinaculum

Question 10

Flexor Pollicis Brevis distal?

Answer 10

base of the proximal phalanx of the thumb.

Question 11

Flexor Pollicis Brevis innervation?

Answer 11

median n

Question 12

Flexor Pollicis Brevis action?

Answer 12

flexes MCP1 (thumb)

Question 13

Opponens Digiti Minimi origin?

Answer 13

hamulus of hamate

Question 14

Opponens Digiti Minimi distal?

Answer 14

medial margin of metacarpal V

Question 15

Opponens Digiti Minimi innervation?

Answer 15

ulnar n

Question 16

Opponens Digiti Minimi action?

Answer 16

It rotates metacarpal of digit 5 towards palm, producing opposition

Question 17

Abductor Digiti Minimi origin?

Answer 17

pisiform; tendon of FCR

Question 18

Abductor Digiti Minimi distal?

Answer 18

base of the proximal phalanx of the little finger

Question 19

Abductor Digiti Minimi innervation?

Answer 19

ulnar n

Question 20

Abductor Digiti Minimi action?

Answer 20

abducts digit 5 [D5]

Question 21

Flexor Digiti Minimi Brevis origin?

Answer 21

Hamulus of flexor retinaculum

Question 22

Flexor Digiti Minimi Brevis distal?

Answer 22

proximal phalanx of digit 5

Question 23

Flexor Digiti Minimi Brevis innervation?

Answer 23

ulnar n

Question 24

Flexor Digiti Minimi Brevis action?

Answer 24

Flexes the MCP joint of digit 5

Question 25

dorsal interossei origin?

Answer 25

Each interossei originates from lateral and medial surfaces of metacarpals

Question 26

dorsal interossei distal?

Answer 26

attach into extensor hood (AKA expnation) and proximal phalanx of each finger

Question 27

dorsal interossei innervation?

Answer 27

ulnar n

Question 28

dorsal interossei action?

Answer 28

abduct fingers at metacarpalphalangeal (MCP) joint

Question 29

palmar interossei origin?

Answer 29

Each interossei

Question 30

palmar interossei distal?

Answer 30

medial or lateral surface of a metacarpal (2, 4, 5) and attaches into the extensor hood and proximal phalanx of same finger (digit).

Question 31

palmar interossei innervation?

Answer 31

ulnar n

Question 32

palmar interossei action?

Answer 32

adducts fingers at MCP joint.

Question 33

lumbricals origin?

Answer 33

from a tendon of flexor digitorum profundus They pass dorsally and laterally around each finger

Question 34

lumbricals distal?

Answer 34

into the extensor hood

Question 35

lumbricals innervation?

Answer 35

The lateral two lumbricals (of the index [D2] and middle [D3] fingers innervated by the median n
medial two lumbricals (little [D5], and ring [D4]fingers) are innervated by the ulnar n

Question 36

lumbricals action?

Answer 36

flex at the MCP joint, and extend at IP joints of each finger

Question 37

adductor pollicis origin?

Answer 37

oblique head - base of 2nd and 3rd metacarpal

transverse head - anterior surface of shaft of 3rd metacarpal

Question 38

adductor pollicis distal?

Answer 38

medial side of base for proximal phalanx of thumb

Question 39

adductor pollicis innervation?

Answer 39

ulnar

Question 40

adductor pollicis action?

Answer 40

adducts the thumb toward the lateral border of the palm