L5: clinical anatomy of the cubital fossa, forearm and wrist

Question 1

floor of the cubital fossa

Answer 1

brachialis

Question 2

roof of the cubital fossa

Answer 2

skin, superficial fascia

Question 3

4 contents of the cubital fossa (lateral to medial)

Answer 3

• radial nerve
• biceps tendon
• brachial artery
• median nerve

Question 4

when does the brachial artery leave the cubital fossa as

Answer 4

the ulnar and radial artery

Question 5

3 veins in the cubital fossa

Answer 5

basilic vein
cephalic vein
median cubital vein

Question 6

the anterior muscles of the forearm

Answer 6

flex wrist and fingers

Question 7

the posterior muscles of the forearm

Answer 7

extend the wrist and fingers

Question 8

common extensor origin=

Answer 8

back of humerus on the lateral epicondyle

Question 9

inflammation of the common extensor origin=

Answer 9

tennis elbow

Question 10

anconeus=

Answer 10

very small triangular muscle connecting humerus to ulna

Question 11

superficial extensor muscles originate from the

Answer 11

common extensor origin

Question 12

5 superficial muscles of the extensor compartment

Answer 12

• extensor carpi radialis longus
• extensor carpi radialis brevis
• extensor digitorum
• extensor digiti minimi
• extensor carpi ulnaris

Question 13

whats special about brachioradialis

Answer 13

origin and innervation are extensor muscles but it is a flexor of the elbow

Question 14

4 muscles from the common extensor origin

Answer 14

• extensor Carpi radialis brevis
• extensor digitorum
• extensor digiti minimi
• extensor carpi ulnaris

Question 15

origin of brachioradialis

Answer 15

upper 2/3 of the lateral supracondylar line of humerus

Question 16

insertion of bracioradialis

Answer 16

base of the radial styloid process

Question 17

origin of extensor carpi radialis longus

Answer 17

lower 1/3 of the lateral supracondylar line of the humerus

Question 18

insertion of extensor carpi radialis longus

Answer 18

dorsal base of 2nd metacarpal

Question 19

insertion of extensor carpi radialis brevis

Answer 19

dorsal base of 3rd metacarpal

Question 20

insertion of extensor digitorum

Answer 20

dorsal middle and distal phalanges of the 4 fingers

Question 21

insertion of extensor digiti minimi

Answer 21

dorsal middle and distal phalanges of the little finger

Question 22

insertion of extensor carpi ulnaris

Answer 22

dorsal base of 5th metacarpal

Question 23

what nerve innervates all the posterior compartment muscles

Answer 23

radial nerve

Question 24

what is the structure on the back of each digit

Answer 24

extensor apperatus

Question 25

how many tendinous strips from the long extensors on the back of the phalanges

Answer 25

1

Question 26

where does the central slip from the extensor apparatus insert

Answer 26

middle phalanx

Question 27

where does the lateral slip from the extensor apparatus insert

Answer 27

base of the distal phalanx

Question 28

what other muscles insert into the middle phalanx

Answer 28

interosseous muscles

Question 29

6 deep muscles of the extensors

Answer 29

``` anconeus supinator abductor pollicis longus extensor pollicis brevis extensor pollicis longus extensor indicis ```

Question 30

what muscle insert into the base of the 1st metacarpal and trapezium

Answer 30

abductor pollicis longus

Question 31

which muscles inserts into the base of the proximal phalanx of the thumb

Answer 31

extensor pollicis brevis

Question 32

which muscle inserts into the base of the distal phalanx of the thumb

Answer 32

extensor pollicis longus

Question 33

what muscle inserts into the dorsal base of the middle and distal phalanges of the index finger

Answer 33

extensor indicis

Question 34

what does the anatomical snuff box lie between

Answer 34

extensor pollicis brevis and extensor pollicis longus

Question 35

what artery lies within the anatomical snuff box

Answer 35

radial artery branches

Question 36

what bone is beneath the anatomical snuff box

Answer 36

scaphoid bone

Question 37

what bone is frequently fractured when falling on outstretched hands

Answer 37

scaphoid bone

Question 38

where is the common flexor origin

Answer 38

medial epicondyle

Question 39

4 superficial flexor muscles

Answer 39

- pronator teres - flexor carpi radialis - palmaris longus - flexor carpi ulnaris

Question 40

where do all superficial muscles originate from

Answer 40

common flexor origin

Question 41

insertion of pronator teres

Answer 41

lateral surface of the mid-shaft of the radius

Question 42

insertion of the flexor carpi radialis

Answer 42

palmar side of the bases of metacarpals 2 and 3

Question 43

insertion of the palmaris longus

Answer 43

forms the palmar aponeurosis

Question 44

insertion of flexor digitorum superficialis

Answer 44

bases of the middle phalanges of the four fingers

Question 45

muscle in the intermediate layer of the anterior compartment

Answer 45

-flexor digitorum superficialis

Question 46

insertion of flexor carpi ulnaris

Answer 46

pisiform, hamate and base of 5th metacarpal

Question 47

what does pronator teres do

Answer 47

pronates the forearm

Question 48

where do the long tendons of the flexor digitorum superficialis run under

Answer 48

the flexor retinaculum

Question 49

job of flexor digitorum superficialis

Answer 49

flex the proximal interphalangeal joint

Question 50

3 deep muscles of the long flexors

Answer 50

flexor digitorum profundus flexor pollicis longus pronator quadratus

Question 51

insertion of flexor digitorum profundus

Answer 51

distal phalanx of the 4 fingers

Question 52

insertion of flexor pollicis longus

Answer 52

base of the distal phalanx of thumb

Question 53

pronator quadratus=

Answer 53

crosses between ulnar and radius to pronate the forearm

Question 54

origin of the flexor digitorum profundus

Answer 54

medial surface of olecranon /ulna and interosseous membrane

Question 55

origin of flexor pollicis longus

Answer 55

anterior surface of radius and interosseous membrane

Question 56

what nerve supplies most flexors of the forearm

Answer 56

median nerve

Question 57

2 flexors that the median nerve doesn't supply

Answer 57

- flexor carpi ulnaris | - half of flexor digitorum profundus

Question 58

median nerve tract through arm and hand

Answer 58

passes into forearm suppling most muscles then through carpal tunnel into the hand where it supplies small muscles in the hand especially at the base of the thumb

Question 59

ulna nerve path in forearm

Answer 59

passes through hardly doing anything apart from 1/2 flexor digitorum profundus

Question 60

what forms the roof of the carpal tunnel

Answer 60

flexor retinaculum

Question 61

what passes underneath the flexor retinaculum

Answer 61

tendons of the long flexors and the median nerve

Question 62

what nerve is affected in carpal tunnel syndrome

Answer 62

median nerve

Question 63

flexing the fingers muscle arrangement from proximal--> distal

Answer 63

palmaris longus digitorum superficialis digitorum profundus

Question 64

muscles for wrist flexion

Answer 64

flexor carpi radialis and ulnaris

Question 65

extension of the wrist

Answer 65

contract extensor carpi ulnaris and radialis

Question 66

adduction of the wrist

Answer 66

ulnar deviation--> extensor carpi ulnaris and flexor carpi ulnaris

Question 67

abduction of the wrist

Answer 67

radial deviation--> flexor carpi radialis and extensor carpi radialis

Question 68

pronating muscles=

Answer 68

pronator teres | pronator quadratus

Question 69

supinating muscles

Answer 69

biceps | dorsal side--> supinator muscle

Question 70

does the ulnar touch the carpals

Answer 70

NO

Question 71

where does wrist flexion and extension occur

Answer 71

at the radiocarpal joint

Question 72

where does wrist pronation and supination occur

Answer 72

a the distal radioulnar joint

Question 73

how is the radial head held in place at the proximal end

Answer 73

annular ligament