lecture 7

Question 1

anterior compartment:
`1. aka
2. mostly consists of what and some of what

Answer 1

1. flexor

2. mostly median nerve and some ulnar nerve

Question 2

posterior compartment:
`1. aka
2. consists of what

Answer 2

1. extensor

2. all radial nerve

Question 3

the anterior compartment:

1. contains WHAT which HAVE what in common?
2. muscles are arranged in # layers which are?

Answer 3

1. flexors and pronators

2. 3; superficial, middle, deep

Question 4

the superficial layer of forearm

1. from and to where?
2. includes which muscles

peter flexing for pam

Answer 4

1. from radial to ulnar

2. pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris

Question 5

pronator teres
origin
insertion
innervated
action

Answer 5

medial epicondyle

lateral surface of the radius

median nerve

pronation and flexion
of forearm

Question 6

flexor carpi radialis
origin
insertion
innervated
action

Answer 6

medial epicondyle

2nd metacarpal

flexion and abduction of the hand

median nerve

Question 7

palmaris longus
origin
insertion
innervated
action

is it sometimes missing?

Answer 7

medial epicondyle

palmar aponeurosis

flexion of hand, tightening of flexor aponeurosis

median nerve

yes

Question 8

flexor carpi ulnaris 
origin
insertion
innervated
action

Answer 8

medial epicondyle of humerus

pisiform, hamate, 5th metacarpal

flexion and adduction of hand

ulnar nerve

Question 9

what are the muscles in the middle layer

Answer 9

flexor digitorum superficialis

Question 10

flexor digitorum superficialis
origin
insertion
action
innervation

Answer 10

medial epicondyle, of humerus

middle phalanx of digits 2-5

flexion of PIP, MCP, and wrist joints

median nerve

Question 11

deep layer has what muscles

Answer 11

flexor pollicis longus, flexor digitorum profundus, pronator quadratus

Question 12

flexor pollicis longus
origin
insertion
action
innervation

Answer 12

radius, interosseous membrane

distal phalanx of digit 1(thumb)

flexion of distal phalanx of digit 1

median nerve

Question 13

flexor digitorum profundus
origin
insertion
action
innervation

Answer 13

anterior ulna, interosseous membrane

distal phalans sof digit 2-5

flexion of DIP joints, flexion of PIP joints, flesion of MCP jint, flesion of wrist

median nerve(digit 2-3)
ulnar nerve(digit 4-5)

Question 14

pronator quadratus
origin
insertion
action
innervation

Answer 14

distal ulna

distal radius

protonation of forearm

median nerve

Question 15

radial artery:

1. passes deep to what, over what, through what, to what in the hand and joins what through what

Answer 15

brachioradialis

distal radius

anatomical sniffbox

deep palmar arterial arch

ulnar artery

deep palmar arterial arch

Question 16

ulnar artery

1. travels with what, gives off what which branches into what 2 arteries, joins what via what

Answer 16

ulnar nerve

common interosseous arteries

joins radial artery

via superficial palmar arterial arch

Question 17

Median nerves innervates what , passes through what, descends deep into what and then passes what

Answer 17

1. all but 1 1/2 muscles of the flexor compartment of the forearm
2. b/w heads of pronator trees muscles
3. deep to flexor difitorum superficialis (FDS)
4. passes deep to the flexor retinaculum (into the carpal tunnel)

Question 18

ulnar nerve pass posterior to what, then between what and what, innervates what

Answer 18

to medial epicondyle

b/w FCU and FDP

flexor carpi ulnaris (FCU) and ulnar 1/2 of flexor digitorum profundus that flexes digits 4 and 5

Question 19

neither what nor what innervates structures above elbow joint

Answer 19

median

ulnar

Question 20

posterior compartment contain what and a major function of what

has # of layers

Answer 20

1. extensors and supinators
2. wrist extensors to enhance the gripping power of the hand
3. 2

Question 21

brachioradialis

Answer 21

lateral supracondylar ridge

distal radius

flexion of forearm, supination of forearm

radial nerve

Question 22

extensor carpi radialis longus

Answer 22

lateral supracondylar ridge

base of 2nd metacarpal

extension of hand, abduction of hand

radial nerve

Question 23

branchioradialis and extensor carpi radialis longus muscles receive their innervation directly from what above what and what is the implication

Answer 23

radial nerve

above the elbow

damage to radial nerve at or below the elbow no impair their innervation

Question 24

extensor carpi radialis brevis

Answer 24

lateral epicondyle of humerus

3rd metacarpal

extension of hand, abduction of hand

deep branch of radial nerve

Question 25

extensor digitorum aka

Answer 25

communis lateral epicondyle of humerus extensor expansions of digit 2-5 extension of MCP and wrist joint posterior interosseous nerve

Question 26

extensor digit minimi

Answer 26

lateral epicondyle of humerus extensor expansion of digit 5 extension of MCO joints, extension of IP joints of digit 5 posterior interosseous nerve

Question 27

extensor carpi ulnaris

Answer 27

lateral epicondyle of humerus, ulna 5th metacarpal extension of hand, adduction of hand posterior interosseous nerve

Question 28

what muscle are the deep layer

Answer 28

supinator, abductor pollicus longus, extensor pollicis brevis, extensor pollicis longus, extensor indicis

Question 29

the posterior interosseous nerve is continuation of a deep branch what after it passes through what

Answer 29

radial nerve supinator muscle

Question 30

radial nerve 1. directly innervates what and what 2. divides into what branches near where 3. deep what innervates what and what 4. afterpassing through supinators, the deep what becomes what which innervates the rest of the what

Answer 30

branchioradialis and extensor carpi radialis longus msucles superficial branch and deep branch; elbow extensor carpi radialis brevis and supinator muscles branch; posterior interosseous nerve ; extensor muscles

Question 31

posterior interosseous artery 1. what artery gives of the common what arrtery which branches into what 2 arteries 2. the what artery then supplies what and what ofwhat compartment

Answer 31

ulnar, common interosseous, anterior and posterior interosseous arteries posterior interosseous, supplies superficial, deep muscles, posterior