Anterior Forearm Flashcards

1
Q

muscles of superficial layer of anterior forearm (medial to lateral)

A

Flexor carpi ulnaris
Palmaris longus
Flexor carpi radialis
Pronator teres

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2
Q

muscles of intermediate layer of anterior forearm

A

flexor digitorum SUPERFICIALIS M

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3
Q

muscles of deep layer of anterior forearm (medial to lateral)

A

flexor digitorum profundus
Flexor pollicus longus
Pronator quadratus

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4
Q

cutaneous innervation of lateral proximal arm

A

axillary n

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5
Q

cutaneous innervation of the lateral distal arm

A

radial n

also innervates the anatomical snuffbox

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6
Q

cutaneous innervation of the armpit to medial epicondyle

A

medial brachial cutaneous n

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7
Q

cutaneous innervation of medial forearm (and some biceps)

A

medial antibrachial n

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8
Q

cutaneous innervation of lateral forearm

A

lateral antibrachial n

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9
Q

cutaneous innervation of 4th and 5th digits

A

ulnar n

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10
Q

cutaneous innervation of 1 2 3 digits

A

median n

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11
Q

superficial muscles of the anterior compartment

A

pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris** (innervated by ulnar n)

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12
Q

intermediate muscles of the anterior compartment of the forearm

A

flexor digitorum superficialis

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13
Q

deep muscles of the anterior compartment of the forearm .

A

flexor digitorum profundus*** (digits 4,5 innervated by ulnar)
flexor pollicis longus
pronator quadratus

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14
Q

all muscles of the anterior compartment of the forearm are innervated by ________ n with the exception of what 2 muscles

A

all are median nerve innervated except
flexor carpi ulnaris
flexor digitorum profundus (to fingers 4,5)
which are innervated by the ulnar n

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15
Q

origin/insertion/innervation/action of pronator teres

A

humeral head/meidal epicondyle –> lateral radius
median n
forearm pronation, weak elbow flexion

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16
Q

origin/insertion/innervation/action of flexor carpi radialis m

A

medial epicondyle –>base of 2nd metacarpal
median n
wrist flexion and abduction
radial deviation of hand

17
Q

abduction of the wrist is performed by

A

flexor carpi radialis

and flexor pollicis longus

18
Q

origin/insertion/innervation/action of palmaris longus

A

medial epicondyle –> palmar aponeurosis
Median n
flexion tightens palmar aponeurosis
weak elbow flexion

19
Q

origin/insertion/innervation/action of flexor carpi ulnaris

A
humeral head-medial epicondyle
ulnar head - olecranon
inserts on pisiform, hook of hamate, base of 5th metacarpal 
ulnar n 
flexion and adduction of hand
20
Q

adduction of the wrist is performed by this muscle

A

flexor carpi ulnaris m

21
Q

origin/insertion/innervation/action of flexor digitorum superficialis m

A

humeral-ulnar head: medial epicondyle/cornoid process
radial head: upper anterior border of radius
inserts into sides of middle phalanges of digits 2-5
median n
weak elbow flexion
wrist, MCP, PIP joint flexion at 2-5

22
Q

origin/insertion/innervation/action of flexor digitorum profundus m

A

ulna and IO membrane to distal phalanges of 2-5 digits
median n (digits 2,3)
ulnar n (digits 4,5)
wrist, MCP, PIP, DIP, of digits 2-5 == flexion

23
Q

origin/insertion/innervation/action of flexor pollicis longus m

A

radius and IO membrane to distal phalanx of thumb (palmar surface)
median n
wrist flexion and abduction of hand
flexion at carpometacarpal joint of thumb, MCP and IP joints

24
Q

origin/insertion/innervation/action of pronator quadratus

A

distal quarter of anterior ulna to distal quarter of anterior radius
median n
pronation of hand
stabilizes distal radioulnar joint

25
condition of inflamed tendons of medial epicondyle due to excessive elbow and wrist flexion - painful swelling and pressure on median n
medial epicondylitis tendonitis golfers/pitchers/bowlers elbow pronator teres and flexor carpi radialis primarily targeted
26
after the median n crosses the cubital fossa with the brachial artery, it passes between what muscle
median n passes between heads of pronator teres m | bretween humeral head and ulnar head
27
after passing through the heads of pronator teres, the median n runs between what two muscles
flexor digitorum superficialis | flexor digitorum profundus
28
after passing between FDS and FDP, the median nerve runs through what struc
transverse carpal ligament before it enters the palm
29
the anterior interosseous branch of the median n arises where
in the cubital fossa | descends down IO membrane with anterior interosseous artery
30
what structures does the anterior interosseous branch of the median nerve supply
radial part of Flexor Digitorum Profundus | Flexor Pollicis longus and pronator quadratus m
31
where does the ulnar nerve enter the forearm
posterior medial epicondyle by way of the groove for the ulnar n of the humerus
32
the ulnar nerve becomes superficial in the distal forearm before passing between what two structures
transverse carpal ligament and palmar carpal ligament to enter the palm
33
branches of the ulnar artery
``` ulnar recurrent a (anterior and posterior) common interosseous a (anterior IO and posterior IO) palmar carpal branch artery muscular branches ```
34
branches of the radial a
radial recurrent a Palmar carpal branch a muscular branches
35
Anterior interosseous syndrome
``` branch of median n supplies Flexor pollicus longus m flexor digitorum profundus m (index and middle digits) Weakness in pincer movement ``` abnormal ok sign
36
hand of benediction is characterized by
dmg to median n | Flexion of PIJ 1-3, DIJ and MPJ of 2,3, lumbricals 1,2 and thenar group ar elost with injury at elbow level
37
Claw hand is characterized by
dmg to distal ulnar n MPJ hyperextended and IPJ flexed due to unopposed action of extensors and flexor digitorum profundus with injury at wrist level