Posterior forearm and dorsum of hand

Question 1

Where do the extensor muscles have a common place of attachment

Answer 1

lateral epicondyle of the humerus (supracondyle ridge)

Question 2

What happens when the common extensor attchment becomes inflamed

Answer 2

Develop ‘tennis elbow’

Question 3

What happens when the common flexor tendon becomes inflamed

Answer 3

develop ‘golfers elbow’

Question 4

Where does the brachioradialis attach

Answer 4

onto the distal radius

Question 5

Where does brachioradialis has action

Answer 5

at the adjacent elbow

Question 6

Where is the extensor carpi radialis longus in relation to the brachioradialis

Answer 6

adjacent to it

Question 7

Where does the extensor carpi radialis longus run

Answer 7

down the radius, crossing the carpals or the wrist bones and attaches on to the base of the second metacarpal.

Question 8

Why is extensor carpi radialis longus an extensor

Answer 8

because it crosses on the dorsum of the wrist and extends the wrist

Question 9

What is adjacent to the extensor carpi radialis longus

Answer 9

extensor carpi radialis brevis

Question 10

Where does the extensor carpi radialis brevis attach

Answer 10

to the base of the third metacarpal

Question 11

What is the extensor muscle that goes to the index finger called

Answer 11

extensor indicis proprius

Question 12

Where does extensor indicis proprius attach

Answer 12

On to the distal phalanx of the index finger

Question 13

What does extensor digitorum have

Answer 13

A common belly that splits into 4 tendons - one for each finger

Question 14

Which extensor muscle only goes to the little finger

Answer 14

extensor digiti minimi

Question 15

Why does the index and little finger have 2 extensor muscles

Answer 15

to allow for a level of independent extension for those 2 fingers

Question 16

Where does extensor carpi ulnaris attatch

Answer 16

On the base of the 5th metacarpal

Question 17

What is the function of extensor carpi ulnaris

Answer 17

extensor of the wrist, it has a balancing action with the extensor carpi radialis

Question 18

Which nerve supplies the extensor muscles

Answer 18

radial

Question 19

Where does abductor pollicis longus attatch

Answer 19

to the base of the 5th metacarpal

Question 20

What movement does abductor pollicis longus produce

Answer 20

Abduction of the thumb

Question 21

What joint foes abductor pollicis longus effect

Answer 21

movements ta the metacarpal joint

Question 22

What muscle runs with abductor pollicis

Answer 22

extensor pollicis brevis

Question 23

Where does extensor pollicis brevis attatch

Answer 23

to the base of the proximal phalanx

Question 24

What joint foes extensor pollicis brevis effect

Answer 24

metacarpal phalangeal joint

Question 25

Where does extensor pollicis longus attach

Answer 25

onto the distal phalanx

Question 26

What joint does extensor pollicis longus effect

Answer 26

extends IP joint of thumb

Question 27

Which artery runs through the anatomical snuff box

Answer 27

radial artery

Question 28

What is the anatomical snuffbox

Answer 28

imaginary anatomical space which is bounded by extensor pollicis longus on one side and the tendons of extensor pollicis brevis along with the abductor pollicis longus on the other side

Question 29

Where does extensor digitorum arisw

Answer 29

from the extensor tendon on the lateral epicondyle

Question 30

What do the 4 tendons of extensor digitorum pass through

Answer 30

extensor retinaculum

Question 31

Where does extensor digit minimi arise from and pass under

Answer 31

arises from the ulnar side of extensor digitorum and passes under extensor retinaculum by itself.

Question 32

Where does extensor indicis lie and arise

Answer 32

lies deep to extensor digitorum and arises from the ulna and interosseous membrane

Question 33

What does extensor indicis pass and under an with what muscle

Answer 33

under extensor retinaculum along with extensor digitorum

Question 34

What do the tendons of extensor digitorum do once they pass out of the retinaculum.

Answer 34

They fan out, then as they approach MP joints they branch and rejoin

Question 35

What do extensor indicis and extensor digit minimi do as they reach the MP joint

Answer 35

join their respective tendons

Question 36

At the MP joint what does each extensor tendon do

Answer 36

gives rise to the extensor hoof and then divides into 3 arts

Question 37

At which joint do the extensor muscles have their main effect

Answer 37

MP joint

Question 38

What muscles does the thumb have

Answer 38

a long flexor, a long abductor and 2 extensors (a long and short one).

Question 39

Where does flexor pollicis longus lie

Answer 39

deep in the forearm, next to digitorum profundus

Question 40

Where does flexor pollciis longus arise

Answer 40

From the anterior surface of the radius and interosseous membrane

Question 41

Where do the tendons of flexor pollciis longus pass

Answer 41

through the carpal tunnel along with the finger flexors

Question 42

Once the flexor pollicis longus merges what does it do

Answer 42

it enters the fibrous flexor sheath of the thumb, and inserts on base of distal phalanx

Question 43

What is the action if flexor pollicis longus

Answer 43

flexes MP and IP joint of thumb

Question 44

Where do the 2 extensors and abductor of the thumb lie

Answer 44

on the extensor part of the forearm, deep to extensor digitorum

Question 45

Where does abductor pollicis longus arise from

Answer 45

the radius and interosseous membrane

Question 46

Where do the 2 extensors and abductor pass through

Answer 46

They emerge obliquely from beneath extensor digitorum, and pass beneath extensor retinaculum – extensor longus by itself

Question 47

Where does the tendon of extensor brevis insert

Answer 47

onto the base of the proximal phalanx

Question 48

Where does the tendon have extensor pollicis longus insert

Answer 48

on base of distal phalanx

Question 49

What movement des abductor pollicis longus produce

Answer 49

abduction and extension movement, occurring at CMC joint

Question 50

What does extensor pollicis longus do

Answer 50

extends IP and MP joint of thumb

Question 51

What joint does extensor pollicis brevis effect

Answer 51

only MP joint

Question 52

What artery, vein and nerve runs through the anterior arm

Answer 52

brachial artery and vein and musculocutaneous nerve

Question 53

What artery, vein and nerve runs through the posterior arm

Answer 53

profunda brachii (and ulnar collateral) artery, profunda brachii vein, radial nerve

Question 54

What artery, vein and nerve runs through the anterior forearm

Answer 54

Radial and ulnar artery, vensae comitantes and median and ulnar nerve

Question 55

What artery, vein and nerve runs through the posterior forearm

Answer 55

Interosseous artery, venae comitantes, radial nerve

Question 56

What artery, vein and nerve runs through the hand

Answer 56

Deep and superficial palmer arches. Ulnar and median nerve

Question 57

What does the flexor digitorum superficialis do

Answer 57

flexes the proximal first 2 phalanges

Question 58

What does flexor digitorum profundus do

Answer 58

flexes all 3 phalanges

Question 59

What do the lumbricals do

Answer 59

pulls on the extensor tendon expansion to flex at the metacarpophalangeal joint and straighten the finger.

Question 60

What does extensor digitorum do

Answer 60

extends the finger

Question 61

Which dermatomes does the lateral cutaneous branch of the forearm innervate

Answer 61

C6 and C7

Question 62

What dermatomes does the ulnar nerve innervate

Answer 62

C8 and T1

Question 63

What dermatomes does the radial nerve innervate

Answer 63

C6, C7 and C8

Question 64

What dermatomes does the musculocutaneous nerve innervate

Answer 64

C5, C6, C7

Question 65

What is a dermatomes

Answer 65

An area of skin innervates by a single spinal nerve

Question 66

What is a myotome

Answer 66

muscles receiving innervation from a single spinal nerve (segmental innervation of movements).

Question 67

What shoulder movement happens at C5

Answer 67

Abduction, lateral rotation and flexion

Question 68

What shoulder movement happens at C6, C7, C8

Answer 68

Adduction, medial rotation and extension

Question 69

What wrist/hand movement happens at C6, C7

Answer 69

Wrist flexion and extension

Question 70

What wrist/hand movement happens at C6, C7, C8

Answer 70

Digit flexion and extension

Question 71

What wrist/hand movement happens at T1

Answer 71

Digital abduction and adduction