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Anatomy 6 > 56: Anterior Arm and Forearm > Flashcards

56: Anterior Arm and Forearm Flashcards

1
Q

more likely to break when fall on forearm

A

ulna

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2
Q

more likely to break when fall on hand

A

radis

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3
Q

ulnar pseudoarthrosis

A

joint within ulna that is congenital or injury related

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4
Q

elbow joint

A

three bones articulating in a single synovial joint capsule

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5
Q

humero-ulnar articulation

A

hinge joint that allows flexion/extension

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6
Q

attach from the coronoid and olecranon to the medial epicondyle of the humerus

A

anterior, posterior and oblique ulnar collateral ligaments

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7
Q

humero-radial articulation

A

ball and socket joint that is functionally a hinge joint

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8
Q

movements of humero-radial articulation

A

flexion/extension

pronation/supination

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9
Q

baseball injury ligament

A

ulnar collateral ligament

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10
Q

“wrist joint”

A

condyloid joint between the RADIUS (not ULNA) and the scaphoid/lunate

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11
Q

what connects the ulna to the pisiform

A

ulnar collateral ligament

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12
Q

“nursemaids elbow”

A

dislocated radial head

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13
Q

innervation to the anterior compartment of the arm

A

musculocutaneous n.

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14
Q

proximal attachmentS of the biceps brachii

A

long head: supraglenoid tubercle of scapula

short head: tip of coracoid process

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15
Q

distal attachment biceps brachii

A

radial tuberosity

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16
Q

nerve biceps brachii

A

musculocutaneous n.

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17
Q

do the biceps have an attachment to the humerus?

A

NO

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18
Q

actions of biceps brachii

A

supinates and flexes forearm
assists in flexion at glenohumeral joint
resists dislocation

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19
Q

proximal attachment brachialis

A

distal half of anterior humerus

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20
Q

distal attachment brachialis

A

coronoid process and ulnar tuberosity

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21
Q

innervation brachialis

A

musculocutaneous AND radial n

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22
Q

action brachialis

A

flexes forearm

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23
Q

proximal attachment coracobrachialis

A

tip of coracoid process of scapula

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24
Q

distal attachment coracobrachialis

A

middle third of medial surface of humerus

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25
actions coracobrachialis
flexion, adduction, and (*) resists dislocation at glenohumeral joint
26
nerve coracobrachialis
musculocutaneous n.
27
proximal attachment of most anterior forearm muscles
common flexor tendon from medial epicondyle of humerus
28
proximal attachmentS pronator teres
humeral/superficial head: medial epicondyle of humerus | ulnar/deep head: proximal ulna
29
what passes between the two heads of the pronator teres?
median n.
30
distal attachment pronator teres
lateral midshaft of radius
31
innervation pronator teres
median n.
32
action pronator teres
pronation
33
PA palmaris longus
medial epicondyle of humerus
34
DA palmaris longus
palmar aponeurosis
35
N palmaris longus
median n.
36
A palmaris longus
flexion of wrist, tense palmar aponeurosis
37
PA flexor carpi radialis
medial epicondyle of humerus
38
DA flexor carpi radialis
palmar base of MC II
39
N flexor carpi radialis
median n.
40
A flexor carpi radialis
flex and abduct the wrist (radial deviation)
41
PA flexor carpi ulnaris
medial epicondyle of humerus and olecranon process
42
DA flexor carpi ulnaris
hook of hamate, pisiform, palmar base of MC V
43
N flexor carpi ulnaris
ulnar n.
44
A flexor carpi ulnaris
flex and adduct the wrist (ulnar deviation)
45
PA flexor digitorum superficialis
medial epicondyle of humerus, proximal radius
46
DA flexor digitorum superficialis
base of intermediate phalanges of digits 2-5
47
N flexor digitorum superficialis
median n.
48
A flexor digitorum superficialis
flex PIP, MCP, and wrist (not DIP)
49
PA flexor digitorum profundus
ulnar shaft, interosseus membrane
50
DA flexor digitorum profundus
base of distal phalanx of digits 2-5
51
A flexor digitorum profundus
flex DIP, PIP, MCP, and wrist
52
N flexor digitorum profundus
``` lateral half (digits 2+3) = anterior interosseous n. (off median) medial half (digits 4 +5) = ulnar n. ```
53
PA flexor pollicus longus
radial shaft, interosseous membrane
54
DA flexor pollicus longus
base of distal phalanx of digit 1 (pollex)
55
N flexor pollicus longus
anterior interosseus n.
56
A flexor pollicus longus
flex 1st carpometacarpal, MCP, IP, wrist joint
57
PA prontator quadratus
medial aspect of distal ulna
58
DA pronator quadratus
lateral aspect of distal radius
59
N pronator quadratus
anterior interosseus n.
60
A prontator quadratus
pronation
61
as the axillary a. passes the inferior border of the _______ it changes its name to the _________
teres major | brachial a.
62
branches off of the profunda brachii
middle collateral a. | radial collateral a.
63
what a. runs with the radial n.?
profunda brachii a.
64
what a. runs with the ulnar n.?
superior ulnar collateral a.
65
branches off of the brachial a.
profunda brachii superior ulnar collateral a. inferior ulnar collateral a.
66
muscle atrophy and shortening of the digital flexors causing the hand to curl into a tight fist following sudden loss of brachial a due to injury to cubital fossa
volkman's ischemic contracture | injury could be a supra-epicondylar fracture
67
terminal branches of the brachial a.
splits into the radial and ulnar aa. in the cubital fossa
68
branches off of the ulnar a.
anterior ulnar recurrent a. posterior ulnar recurrent a. common interosseous a.
69
perforating branches to the posterior compartment of forearm
off of the anterior interosseus a. (from common interosseous a.)
70
the recurrent interosseous a. is a branch off of ...
posterior interosseus a.
71
anterior circumflex humeral a. anastomoses with...
posterior circumflex humeral a.
72
radial recurrent a. anastomoses with ...
radial collateral a. --> deep brachial a..
73
recurrent interosseous a. anastomoses with ...
middle collateral a. ----> deep brachial a.
74
superior ulnar collateral a. anastomoses with...
posterior ulnar recurrent a.
75
inferior ulnar collateral a. anastomoses with...
anterior ulnar recurrent a.
76
arises from dorsal venous network on dorsum of hand and runs along lateral upper limb draining into subclavian v. passes through deltopectoral groove
cephalic v.
77
arises from dorsal venous network on dorsum of hand and runs along medial upper limb draining into axillary v. passes through basilic hiatus
basilic v.
78
joins the basilic and cephalic v. in cubital fossa
median cubital
79
what is found in the triangular interval?
radial n. and deep brachial a.
80
borders of the triangular interval
lateral: lateral head of triceps medial: long head of triceps superior: teres major
81
borders of the cubital fossa
lateral: brachioradialis medial: pronator teres superior: line connecting medial and lateral epicondyles
82
contents of cubital fossa
``` superficial vv. bracial a. ulnar a. radial a. median n. radial n. biceps brachii tendon bicipital aponeurosis ```
83
boundaries of snuff box
lateral: tendons of abductor pollicis longus AND extensor pollicus brevis medial: tendon of extensor pollicis longus
84
what does the snuff box contain
radial a. (and scaphoid bone)
85
sign of benediction
inability to flex lateral three digits ACTIVE test due to loss of long flexors of the forearm except those innervated by ulnar n. loss of muscles of thenar eminence numbness on lateral palm *injury to median n. in cubital fossa or more proximal
86
pronator syndrome
compression of the median n. between humeral and ulnar heads of the pronator teres m. pain in proximal forearm, some weakness flexing fingers and wrist, decreased sensation in lateral palm and fingers
87
inability to make OK sign
anterior interosseous syndrome damage to the interosseous n. only usually due to trauma loss of flexor pollicus longus and lateral half of flexor digitiorum profundus
88
when anterior interosseous syndrome is not accompanied by sensory deficits of deficits of the thenar muscles -->
impingement of ant. interosseous n. only
89
where is the ulnar n. most frequently injured?
where the n. passes posterior to the medial epicondyle of the humerus
90
"ulnar claw" (not full claw of klumpke or sign of benediction though similar)
MCP 4 and 5 hyperextended with the IP joints flexed due to loss of innervation of the lumbricals to these digits (also ab/adduction of fingers compromised, atrophy of first dorsal interosseous m. and sensation loss to medial hand) Passive clinical sign injury to ulnar n. at elbow or more proximal
91
compression of the ulnar n. in the cubital tunnel formed by the humeral and ulnar heads of the flexor carpi ulnaris posterior to the medial epicondyle
cubital tunnel syndrome numbness and paesthesia of medial 1.5 digits and medial palm
92
"claw hand"
proximal ulnar n. injury inability of the pt to make a tigh fist due to loss of the intrinsic muscles of hand and long flexors to digits 4+5 when pt asked to make a tight fist, assumes loose claw-like posture instead

Anatomy 6 (8 decks)

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