Intrinsic Muscles of the Hand (Hypothenar and thenar compartments)

Question 1

What is the origin of Opponens digiti minimi?

Answer 1

Hook of hamate and flexor retinaculum

Question 2

What is the insertion of opponends digiti minimi?

Answer 2

Medial border of 5th metacarpal

Question 3

What is the innervation for the hypothenar compartment?

Answer 3

Deep branch of ulnar nerve (C8, T1)

Question 4

What is the action of the opponens digiti minimi?

Answer 4

Draws 5th metacarpal anteriorly and rotates it, bringing the little finger into opposition with thumb

Question 5

What is the origin of abductor digiti minimi

Answer 5

Pisiform

Question 6

What is the insertion of abductor digiti minimi

Answer 6

medial side of proximal phalynx of 5th finger

Question 7

What is the origin of flexor digiti minimi brevis?

Answer 7

Hook of hamate and flexor retinaculum

Question 8

What is the insertion of flexor digiti minimi brevis?

Answer 8

Medial side of base of proximal phalanx of little finger

Question 9

What is the action of flexor digiti minimi brevis?

Answer 9

Flexes the proximal phalynx of the little finger

Question 10

What is the origin of all of the thenar compartment muscles?

Answer 10

Flexor retinaculum and tubercules of scaphoid and trapezium

Question 11

What is the innervation of all of the thenar compartment muscles?

Answer 11

Recurrent branch of median nerve (C8, T1)

Question 12

What is the insertion of opponens pollicis

Answer 12

Lateral side of 1st metacarpal

Question 13

What is the insertion of abductor pollicis brevis and flexor pollicis brevis

Answer 13

Lateral side of base of proximal phalanx of thumb