Muscles Of The Fingers And Thumb

Question 1

Flexor digitorum superficialis

Answer 1

Flexion of digits 2-5 (MP and PIP joints

Question 2

Flexor digitorum profundus

Answer 2

Flexion of digits 2-5 (MP and PIP)

Question 3

Flexor digiti minimi brevis

Answer 3

Flexion of 5th digit

Question 4

Flexor pollicis longus

Answer 4

Flexion of thumb (all joints)

Question 5

Flexor pollicis brevis

Answer 5

Flexion of thumb (CMC and MP joints)

Question 6

Extensor digitorum

Answer 6

Extension of digits 2-5

Question 7

Extensor digiti minimi

Answer 7

Extension of digit 5

Question 8

Extensor indicis

Answer 8

Extension and addiction of the 2nd digit

Question 9

Extensor pollicis brevis

Answer 9

Extension of the thumb (CMC and MP)
Also abducts the wrist

Question 10

Extensor pollicis longus

Answer 10

Extension of the thumb
Abducts the wrist

Question 11

Adductor pollicis

Answer 11

Thumb adduction

Question 12

Abductor pollicis brevis

Answer 12

Thumb abduction

Question 13

Abductor pollicis longus

Answer 13

Thumb abduction and extension
Abducts the wrist

Question 14

Opponens pollicis

Answer 14

Thumb opposition

Question 15

Abductor digiti minimi

Answer 15

Abducts the 5th digit

Question 16

Opponens digiti minimi

Answer 16

Opposition of the 5th digit

Question 17

Dorsal interossei

Answer 17

Abduction of the 2, 3, 4 digit

Question 18

Palmar interossei

Answer 18

Adduction of all digits

Question 19

Lumbricals

Answer 19

Extension of digits 2-5 at the PIP and DIP joints
Flexion of digits 2-5 at the MP joints

Question 20

Palmaris brevis

Answer 20

Tension of the skin of the palm on the ulnar side during a grip action