Anatomy Test 2: Muscles Groups Of The Hand

Front 1

List the short muscles of the thumb.

Back 1

thenar eminence muscles (abductor pollicis brevis, flexor pollicis brevis and opponens pollicis) and adductor pollicis

Front 2

All thenar muscles arise from what? (origin)

Back 2

flexor retinaculum and the trapezium

Front 3

All thenar muscles insert on what?

Back 3

shaft (body) of the first metacarpal

Front 4

Where does the adductor pollicis insert?

Back 4

base of the proximal phalanx

Front 5

What is the origin of the adductor pollicis? (hint: two heads)

Back 5

TRANSVERSE HEAD-shaft of 3rd metacarpal
OBLIQUE HEAD-bases of 1st 2nd and 3rd metacarpals

Front 6

All thenar muscles are supplied by what nerve?

Back 6

recurrent branch of the median nerve (except the deep head of the flexor pollicis brevis--- ulnar nerve)

Front 7

The adductor pollicis is supplied by what nerve?

Back 7

ulnar nerve

Front 8

List the hypothenar muscles.

Back 8

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

Front 9

Where does the palmaris brevis originate from?

Back 9

flexor retinaculum and palmar aponeurosis

Front 10

what originates from the pisiform bone?

Back 10

abductor digiti minimi

Front 11

What two muscles orginate from the hook of the hamate and the flexor retinaculum?

Back 11

flexor digiti mimini brevis and the opponens digiti minimi

Front 12

All hypothenar muscles (except the opponens digiti minimi) insert where?

Back 12

proximal phalanx of the 5th digit

Front 13

where does the opponens digiti minimi insert?

Back 13

shaft of the 5th metacarpal

Front 14

all hypothenar muscles (except palmaris brevis) are supplied by what nerve?

Back 14

deep branch of the ulnar nerve

Front 15

The palmaris brevis is innervated by what nerve?

Back 15

ulnar nerve or its superficial branch

Front 16

There are __ palmar and __ dorsal interossei muscles.

Back 16

3
5

Front 17

No palmar interossei muscles insert on the ___ digit.

Back 17

3rd

Front 18

Two dorsal interossei muscles insert of the __ digit.

Back 18

3rd

Front 19

dorsal interossei muscles abduct the __ , ___,, and ___ digits.

Back 19

2nd 3rd 4th

Front 20

Palmar interossei muscles adduct the ___. ____. and ___ digits.

Back 20

2nd 4th 5th

Front 21

The interossei mucles may assist in flexion of the ___ joints or with extension of the ____ and _____ joints.

Back 21

MP
PIP, DIP

Front 22

How many lumbricals are there?

Back 22

4

Front 23

Where do the Lumbricals originate?

Back 23

flexor digitorum profundus tendons

Front 24

____ lumbricals (3rd and 4th) are innervated by the ___ nerve?

Back 24

medial
ulnar

Front 25

_____ lunbricals (1st and 2nd) are innervated by the ___ nerve?

Back 25

lateral
median

Front 26

What is the primary function of the lumbricals?

Back 26

extend the interphalangeal joints

Front 27

What is the secondary function of the lumbricals?

Back 27

flex MP joints