Muscles of the Hand

Question 1

Abductor Digiti Minimi innervation

Answer 1

deep branch of the ulnar nerve

C8-T1

Question 2

Abductor Digiti Minimi attachments

Answer 2

from the pisiform to the ulnar side of the base of the proximal phalanx of the 5th digit

Question 3

Actions of abductor digiti minimi

Answer 3

abducts the 5th digit

Question 4

Abductor pollicis brevis innervation

Answer 4

recurrent branch of the median nerve (C6-T1)

Question 5

Attachments of the abductor pollicis brevis

Answer 5

from the transverse carpal lig. –> the radial side of the base of the proximal phalanx of the thumb and tubercle of trapezium

Question 6

Action of the abductor pollicis brevis

Answer 6

abducts thumb

Question 7

Adductor pollicis innervation

Answer 7

deep branch of the ulnar nerve (C8-T1)

Question 8

Adductor pollicis attachments

Answer 8

from the capitate & 2nd & 3rd metacarpals (oblique head) & the palmar aspect of the 3rd metacarpal (transverse head) —> the base of the proximal phalanx of the thumb

Question 9

Adductor pollicis actions

Answer 9

adducts thumb

Question 10

Innervation of the dorsal interossei

Answer 10

deep branch of the ulnar nerve (C8-T1)

Question 11

Attachments of the dorsal interossei

Answer 11

from the adjacent sides of the metacarpals –> the proximal phalangeal bases & dorsal digital expansions of digits 2-4

Question 12

Actions of the dorsal interossei

Answer 12

abducts (MCP), flexes (MCP & extends (IP) digits 2-4

Question 13

innervation of the flexor digiti minimi brevis

Answer 13

(C8-T1)

deep branch of the ulnar nerve

Question 14

Attachments of the flexor digiti minimi brevis

Answer 14

from the hamate —> the ulnar side of the base of the proximal phalanx of the 5th digit

Question 15

Actions of the flexor digiti minimi brevis

Answer 15

flexes the MCP (5th digit)

Question 16

Innervation of the flexor pollicis brevis

Answer 16

superficial head- C6-T1
deep head C8-T1

recurrent brach of the median nerve (superficial head)

deep branch of the ulnar nerve (deep head)

Question 17

Actions of the flexor pollicis brevis

Answer 17

flexes thumb at the MCP

Question 18

Attachments of the flexor pollicis brevis

Answer 18

from the transverse carpal lig. & trapezium to the radial side of the base of the proximal phalanx of the thumb

deep head blends with opponens pollicis

Question 19

Innervation of the lumbricals

Answer 19

deep branch of the ulnar nerve- lumbricals 3 and 4 (C8-T1)

median nerve - lumbricals 1 and 2 (C7-T1)

Question 20

Attachments of the lumbricals

Answer 20

flexor digitorum profundus tendons–> radial side of the dorsal digital expansions of digits 2-5

Question 21

Actions of the lumbricals

Answer 21

flexes MCP and extends the IP joints of digits 2-5

Question 22

Innervation of the opponens digiti minimi

Answer 22

deep branch of the ulnar nerve (C8-T1)

hypothenar

Question 23

Attachments of the opponens digiti minimi

Answer 23

From the hook of the hamate–> ulnar margin of the shaft of the 5th metacarpal

Question 24

Actions of the opponens digiti minimi

Answer 24

opposition of the 5th digit to the thumb

Question 25

Innervation of the opponens pollics

Answer 25

recurrent branch of the median nerve (C6-T1) | thenar eminence

Question 26

Attachments of the opponens pollicis

Answer 26

transverse carpal ligament and trapezium--> palmar surface of the 1st MC

Question 27

Actions of the opponens pollicis

Answer 27

opposition of the thumb to the 5th digit

Question 28

Innervation of the palmar interossei

Answer 28

deep branch of the ulnar nerve (C8-T1) "PAD"

Question 29

Attachments of the palmar interossei

Answer 29

from the palmar aspects of metacarpals 2, 4 & 5 to the dorsal digital expansions of digits 2, 4, 5

Question 30

Actions of the palmar interossei

Answer 30

adduct (MCP), flexes (MCP), and extends (IP) digits 2, 4, 5