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1

The intrinsic muscles of the hand can be separated into 3 groups, name them

Thenar
Hypothenar
Midpaler

2

What is the innervation of these groups of muscles

Median and Ulnar Nerves

3

Group of muslces that form the thenar eminence of the lateral side of the palm, or the rounded muscular area

Thenar muscle (pollex)

4

Name the 3 muscles of the thenar eminence

Abductor Pollicis Brevis
Flexor Pollicis Brevis
Opponens Pollicis

5

The action of the thenar eminence

Opposition of the thumb (moving it to touch tip of little finger)

6

Muscle that moves the thumb but is not part of the thenar eminence

Adductor pollicis

7

Short abductor of the thumb that forms lateral edge of the thenar eminence

Abductor pollicis brevis

8

Action of the abductor pollicis brevis

Abduction of the thumb

9

Origin of the abductor pollicis brevis

Scaphoid, Trapezium, flexor retinaculum

10

Insertion of abductor pollicis brevis

Base of the proximal phalynx of the thumb

11

Innervation

Median nerve

12

Muscle located medial to the abductor pollicis brevis that can be difficult to separate, that is a short flexor of the thumb

Flexor pollicis brevis

13

Origin of the flexor pollicis brevis

Trapezium
Flexor Retinaculum

14

Actions of the flexor pollicis brevis

Flexing the thumb
Opposition

15

Insertion of flexor pollicis brevis that often fuses with abductor pollicis brevis

Base of proximal phalynx

16

Innervation

Median Nerve

17

Muscle located deep to the abductor pollicis brevis and flexor pollicis brevis

Opponens pollicis

18

Insertion of opponens pollicis

Lateral (radial)border of the 1st metacarpal

19

Action of the opponens pollicis

Opposes the thumb

20

Innervation

Median Nerve

21

Origin of opponens pollicis

Trapezium
Flexor Retinaculum

22

Muscle that is deeply placed in hand that fills in the web of space on the palmar side of the hand

Adductor Pollicis

23

Action of the adductor pollicis

Adducts the thumb

24

Innervation of the adductor pollicis

Ulnar Nerve

25

Origin

Capitate,
Bases of metacarpals 2 and 3
3rd metacarpal

26

Insertion of adductor pollicis

Ulnar side of proximal phalynx of thumb

27

Group of three muscles that form the hypothenar eminence on the medial side of the palm that are responsible for movement of the pinky

Abductor digiti minimi
Flexor digiti minimi
Opponens digiti minimi

28

Muscle that is not part of the hypothenar compartment because it doesn't move the little finger

Palmaris Brevis

29

A group of muscles that is small tranverse bands located over the hypothenar muscles. It is relatively unimportant because it doesn't move the little finger

Palmaris Brevis

30

What does the palmaris brevis do?

Deepen the palm
Provides gripping action