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MSK Exam II > Shoulder region and Brachium and Cubital Fossa > Flashcards

Shoulder region and Brachium and Cubital Fossa Flashcards

1
Q

Origin and insertion of deltoid

A

origin: lateral 1/3 anterior border of clavicle, acromion, spine of scapula
insertion: deltoid tuberosity

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2
Q

What is the action of deltoid

A

abduction after it has begun
anterior- flexes and medially rotates
middle- abduction only
posterior- extends and laterally rotates

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3
Q

What innervates deltoid

A

Axillary n

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4
Q

What is located directly deep to deltoid m

A

subdeltoid or subacromial bursa

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5
Q

What rotator cuff is most prone to injury

A

supraspinatus

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6
Q

origin and insertion of supraspinatus

A

origin: supraspinous fossa of scapula
insertion: highest facet on posterior surface greater tubercle of humerus

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7
Q

What is the action of supraspinatus

A

initiates abduction of the humerus

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8
Q

What innervates supraspinatus

A

suprascapular nerve

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9
Q

What initiates abduction of humerus

A

supraspinatus m

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10
Q

origin and insertion of infraspinatus

A

origin: infraspinous fossa of scapula
insertion: middle facet on posterior surface of greater tubercle of humerus

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11
Q

What is the action of infraspinatus

A

lateral rotation of humerus

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12
Q

What innervates infraspinatus

A

suprascapular n

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13
Q

What runs in the suprascapular notch

A

the supra scapular n

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14
Q

What runs over the suprascap notch

A

suprascap artery

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15
Q

where is the superior transverse scap ligament

A

closes top of suprascap notch

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16
Q

origin and insertion of teres minor

A

origin: middle 1/3 to upper 2/3 of lateral border of scapula
insertion: lowest facet on the posterior surface of the greater tubercle of the humerus

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17
Q

what is the action of teres minor

A

lateral rotation of the humerus

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18
Q

what innervates teres minor

A

axillary n

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19
Q

What tendons assist in strengthening the gelnohumeral joint

A

supraspinatus, infraspinatus and teres minor

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20
Q

origin and insertion of teres major

A

origin: dorsal surface of the inferior angle of scapula
insertion: crest of lesser tubercle of humerus

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21
Q

What is the action of teres major

A

extension, adduction and medial rotation of humerus

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22
Q

What innervates teres major

A

lower subscapular n

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23
Q

origin and insertion of subscapularis

A

origin: subscapular fossa
insertion: lesser tubercle of humerus

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24
Q

what is the action of subscapularis

A

medial rotation of humerus

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25
what innervates subscapularis
upper and lower subscapular n
26
what are the rotator cuff m
subscapularis, supraspinatus, infraspinatus, teres minor
27
origin and insertion of serratus anterior
origin: outer surfaces of ribs 1-8 or9 insertion: vertebral costal surface of scapula from superior to inferior angle
28
What is the action of serratus anterior
protracts scapula, upwardly rotates the glenoid cavity, fixates scapula to thoracic wall
29
what innervates serratus anterior
long thoracic n
30
what function is serratus anterior an accessory m for
respiration when in supinated
31
What is characterized condition of injury to long thoracic n
elevation of scapula away from body along medial border and inferior angle "winged scapula", inability to abduct the upper limb
32
What spaces are created by the long head of triceps
quadrangular and triangular
33
what are the borders of the quandrangular space in upper arm
superior- teres minor inferior- teres major lateral- humerus medial- long head of triceps
34
What are the contents of the quandrangular space
axillary nerve | posterior humeral circumflex a
35
what are the borders of the triangular space in upper limb
superior- teres minor inferior- teres major lateral- long head triceps
36
what are the contents of the triangular space in upper limb
circumflex scapular a
37
what arteries are involved in scapular anastomoses
deep branch transverse cervical a, suprascap, acromial branch, circumflex scapular a, thoracodorsal a, ant and post humeral circumflex aa
38
What aa branch from third portion of axillary a
circumflex scap thoracodorsal ant and post humeral circumflex aa
39
Where does suprascap a come off from
thyrocervical trunk off subclavian a
40
what anastomoses with the circumflex scapular and thoracodorsal aa
the branches from thyrocervical trunk | transverse cervical and suprascapular
41
what does the acromial branch of thoracoacromial a anstomose with?
the ant and post humeral circumflex aa
42
what aa anastomose with branches of intercostal aa
deep transverse cervical aa
43
what is the brachial fascia continuous with
fascia of shoulder mm above and with antebrachial fascia below
44
What is enclosed in the medial intermuscular septum
brachial a, vv, median n, musculocutaneous n and ulnar n
45
what are the anterior compartment mm
brachialis, biceps brachii, coracobrachialis
46
What are the 3 primary forearm flexors
biceps brachii, brachialis, brachioradialis
47
Origin and insertion of biceps brachii
origin long head: supraglenoid tubercle of scapula origin short head: coracoid process of scapula insertion: common tendon to radial tuberosity and bicipital aponeurosis
48
what is the action of biceps brachii
flexes forearm and supinates hand. MOST powerful supinator above 90 degrees of flexion long head assists in flexing arm
49
what innervates biceps brachii
musculocutaneous
50
origin and insertion of brachialis
origin: distal half of the anterior surface of humerus insertion: coronoid process and tuberosity of the ulna
51
what is the action of brachialis
flexion of forearm MOST powerful flexor
52
what innervates brachialis
musculocutaneous
53
origin and insertion of brachioradialis
origin: lateral supracondylar ridge of humerus insertion: lateral radius at base of styloid process
54
action of brachioradialis
flexion of forearm (midway supination)
55
origin and insertion of coracobrachialis
origin: coracoid process of scapula insertion: middle third, medial surface of humerus
56
what is the action of coracobrachialis
flexion, adduction of humerus
57
innervation of coracobrachialis
msuculocutaneous
58
innervation of brachioradialis
radial n
59
origin of the tricep heads
long head- infraglenoid tubercle of scapula lateral head- posterior surface of humerus proximal to radial groove medial head- posterior surface of humerus distal to radial groove
60
insertion of triceps brachii
posterior surface olecranon process of ulna
61
action of triceps brachii
all heads act to extend the forearm
62
what is the specific action of long head triceps
extends and adducts arm at shoulder joint
63
what innervates triceps brachii
radial n
64
origin and insertion of anconeus
origin: posterior surface lateral epicondyle of humerus insertion: lateral surface of olecranon and proximal posterior surface of ulna
65
What is the action of anconeus
assists triceps in extension of forearm
66
what innervates anconeus
radial n
67
Where are the borders of brachial a
starts distal to inferior border of teres major and ends in cubital fossa where it splits
68
what are the branches of brachial a
profunda brachial- posteromedial and divides into middle and radial collateral aa superior ulnar collateral- medial aspect mid portion(anastomoses with posterior ulnar recurrent a) inferior ulnar collateral- medial aspect distal portion (anastomoses with anterior ulnar recurrent a)
69
What are the superficial vv in the upper limb
cephalic and basilic
70
what tributaries become cephalic and where does it go
lateral dorsum of hand (dorsal venous arch) goes superior to forearm along lateral surface. courses between deltoid and pectoralis major mm pierces costocoracoid membrane to join axillary vein
71
what tributaries become basilic and where does it go
medial dorsum of hand (dorsal venous arch), ascends posterormedial forearm to medial surface arm and pierces brachial fascia at midportion
72
what joins the basilic and cephalic together
median cubital vein
73
what are the deep vv of the brachium
brachial vv that are formed by union of radial and ulnar vv that parallel brachial a
74
where does basilic v join brachial vv
inferior border of teres major m
75
What nerves run in the brachium
median, ulnar, musculocutaneous and radial
76
What nerves give off branches to supply mm in brachium
musculocutaneous (flexors) radial (extensors)
77
what nerves give off branches in elbow joint
all the nerves
78
what cord levels does ulnar nerve contain
C8 and T1
79
what are the cord levels in median nerve
C6 C7 C8 T1
80
what are the cord levels in radial nerve
C5 C6 C7 C8 T1
81
what are the cord levels in musculocutaneous
C5 C6 C7
82
what are the boundaries of the cubital fossa
lateral: brachioradialis m medial: pronator teres m superior: a line drawn through both humeral epicondyles roof: deep fascia floor: brachialis and supinator m
83
contents of cubital fossa
T: tendon of the biceps A: brachial a dividing radial and ulnar aa N: median n lateral to medial
84
what structures lay superficial to cubital fossa
median cubital vein and lateral antebrachial cutaneous n
85
what structures are deep to the cubital fossa
bifurcation of the radial n into superficial and deep

MSK Exam II (10 decks)

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