muscles of the hand

Question 0

Opponens pollicis proximal and distal attachment

Answer 0

proximal: flexor retinaculum and tubercles of scaphoid and trapezium
distal: lateral side of 1st metacarpal

Question 1

thenar muscles?

Answer 1

opponens pollicis, abductor pollicis brevis, flexor pollicis brevis, adductor pollicis

Question 2

Abductor pollicis brevis proximal and distal attachment

Answer 2

Proximal: Flexor retinaculum and tubercles of scaphoid and trapezium

distal: Lateral side of base of proximal phalanx of thmub

Question 3

Flexor pollicis brevis proximal and distal attachment

Answer 3

Proximal: flexor retinaculum and tubercle of scaphoid and trapezium

Distal: lateral side of base of proximal phalanx of thumb

Question 4

Opponens pollicis innervation and actions

Answer 4

innervation: Recurrent branch of median nerve (C8, T1)
action: to oppose thumb, it draws 1st metacarpel medially to center of palm and rotates it Medially

Question 5

Abductor pollicis brevis innervation and actions

Answer 5

Innervation: recurrent branch of median nerve C8, T1

action: Abducts thumb, helps oppose it

Question 6

Flexor pollicis brevis innervation and actions

Answer 6

Innervation: Recurrent branch of median nerve C8, T1

Action: Flexes thumb

Question 8

Abductor digit minimi innervation and actions

Answer 8

Innervation: Deep branch of ulnar nerve C8, T1

Action: Abducts 5th finger assists in flexion of its proximal phalanx

Question 9

Flexor digiti minimi brevis innervation and actions

Answer 9

Innervation: deep branch of ulnar nerve C8, T1

action: Flexes proximal phalanx of 5th finger

Question 10

Opponens digiti minimi innervation and actions

Answer 10

innervation: Deep branch of ulnar nerve C8, T1

Action: draws 5th metacarpal anterior and rotates it, bringing 5th finger into opposition with thumb

Question 11

Abductor digiti minimi Proximal and distal attachment

Answer 11

Proximal: Pisiform

distal: Medial side of base of proximal phalanx of 5th finger

Question 12

Flexor digiti minimi brevis Proximal and distal attachment

Answer 12

Proximal: Hook of hamate and flexor retinaculum

Distal: Medial side of base of proximal phalanx of 5th finger

Question 13

Opponens digiti minimi Proximal and distal attachment

Answer 13

Proximal: Hook of hamate and flexor retinaculum

Distal: Medial border of 5th metacarpel

Question 14

Short muscles?

Answer 14

Lumbricals, Dorsal interossei, palmar interossei

Question 15

Lumbericals I and 2 Proximal and distal attachment

Answer 15

Proximal: Lateral two tendons of flexor digitorum profundus (as unipennate muscles)

Distal: Lateral sides of extensor expansions of 2nd-5th fingers

Question 16

Lumbricals 3 and 4 Proximal and distal attachment

Answer 16

Proximal: medial three tendons of flexor digitorum profundus (as bipennate muscles)

Distal: Lateral sides of extensor expansions of 2nd-5th fingers

Question 17

Dorsal interossei 1-4 Proximal and distal attachment

Answer 17

Proximal: Adjacent sides of 2 metacarpels (as bipennate muscles)

Distal: Bases of proximal phalanges; extensor expansions of 2nd-4th fingers

Question 18

Palmar interossei 1-3 Proximal and distal attachment

Answer 18

Proximal: Palmar surfaces of 2nd, 4th, and 5th metacarpals (as unipennate muscles)

Distal: Bases of proximal phalanges; extensor expansions of 2nd, 4th, and 5th fingers

Question 19

Lumbericals 1and 2, 3 and 4 (have the same innervation and actions)

Answer 19

Innervation: Median nerve C8, T1

Actions:Flex metacarpophalangeal joints, extend interphalangeal joints of 2nd-5th fingers

Question 20

Dorsal interossei 1-4 and Palmar interossei 1-3 innervation (have the same innervation)

Answer 20

Deep branch of ulnar nerve C8, T1

Question 21

Dorsal interossei 1-4 actions

Answer 21

Abducts 2nd-4th fingers from axial line, act with lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

Question 22

Palmar interossei 1-3 actions

Answer 22

Adduct 2nd, 4th, and 5th fingers toward axial line assist lumbericals in flexing metacarpophalangeal joints and extending interphalangeal joints

Question 25

hypothenar muscles

Answer 25

abductor digit minimi, flexor digiti minimi brevis, opponens digiti minimi

Question 26

Adductor pollicis Oblique head and transverse head proximal attachment

Answer 26

Oblique head: Bases of 2nd and 3rd metacarpals, capitate, adjacent carpals

Transverse Head: Anterior surface of shaft of 3rd metacarpals

Question 27

Adductors Pollicis Distal attachment

Answer 27

Medial side of base of proximal phalanx of 1st finger

Question 28

Adductor Pollicis innervation

Answer 28

Deep branch of ulnar nerve C8, T1

Question 29

Adductor Pollicis action

Answer 29

Adducts thumb toward lateral border of palm