Intrinsic Muscles of the Hand(Thenar muscles)

Question 0

Insertion of Opponens Pollicis

Answer 0

Lateral side of 1st metacarpal

Question 1

Origin of Oppenens Pollicis, Abductor pollicis brevis, and Flexor Pollicis Brevis

Answer 1

Flexor retinaculum and tubercles of scaphoid and trapezium

Question 2

Innervation of Opponens Pollicis

Answer 2

Recurrent Branch of median nerve

Question 3

Action of Opponens Pollicis

Answer 3

To oppose thumb, it draws 1st metacarpal medially to center of palm and rotates it medially

Question 4

Insertion of Abductor Pollicis Brevis

Answer 4

Lateral side of base of thumb

Question 5

Innervation of Abductor Pollicis Brevis

Answer 5

Recurrent branch of median nerve (C8, T1)

Question 6

Action of Abductor Pollicis Brevis

Answer 6

Abducts thumb; helps oppose it

Question 7

Insertion of Flexor Pollicis Brevis

Answer 7

Lateral side of base of proximal thumb

Question 8

Innervation of Flexor Pollicis Brevis

Answer 8

Recurrent branch of median nerve (C8, T1)

Question 9

Action of Flexor Pollicis Brevis

Answer 9

Flexes thumb

Question 10

Origin of Adductor Pollicis (Oblique head)

Answer 10

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

Question 11

Origin of Adductor Pollicis (Transverse head)

Answer 11

Anterior surface of shaft of 3rd metacarpal

Question 12

Insertion of Adductor Pollicis (Oblique and transverse)

Answer 12

Medial side of base of proximal phalanx of thumb

Question 13

Innervation of Adductor Pollicis

Answer 13

Deep branch of ulnar nerve (C8, T1)

Question 14

Action of Adductor Pollicis

Answer 14

Adducts thumb toward lateral border of palm