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Functional Anatomy > posterior shoulder > Flashcards

posterior shoulder Flashcards

1
Q

what does the long head of the biceps brachii attach to

A

supraglenoid tubercle, glenoid labrum

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2
Q

what does the long head of the triceps attach to

A

infraglenoid tubercle

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3
Q

what attaches to the lateral lips of the intertubercle sulcus

A

pectoralis major

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4
Q

what attaches to the medial lips of the intertubercle sulcus

A

teres major

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5
Q

what attaches to the floor of the intertubercle sulcus

A

latissimus dorsi

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6
Q

what would a surgical neck fracture damage?

A

axillary nerve and posterior circumflex humeral artery

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7
Q

what would a midshaft humerus fracture damage?

A

radial nerve and deep brachial artery

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8
Q

where does the long head of the biceps brachii pass through?

A

through the intertubercular groove and under transverse humeral ligament

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9
Q

muscles of the rotator cuff

A

supraspinatus
infraspinatus
teres minor
subscapularis

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10
Q

Importance of supraspinatus

A

helps hold the humerus in place

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11
Q

importance of infraspinatus, teres minor, and subscapularis

A

together work to hold humeral head against glenoid
exert a downward glide on humerus head needed for abduction

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12
Q

importance of teres minor and infraspinatus

A

laterally rotate the arm needed for abduction

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13
Q

supraspinatus attachments

A

subscapular fossa
greater tubercle

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14
Q

supraspinatus action

A

shoulder abduction, stabilize shoulder

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15
Q

infraspinatus attachments

A

infrascapular fossa
greater tubercle

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16
Q

infraspinatus actions

A

shoulder lateral rotation
stabilize shoulder

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17
Q

teres minor attachments

A

lateral scapula border
greater tubercle

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18
Q

teres minor actions

A

shoulder lateral rotation
stabilize shoulder

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19
Q

subscapularis attachments

A

subscapular fossa
lesser tubercle

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20
Q

subscapularis actions

A

medially rotates the arm
stabilize shoulder

21
Q

innervation of supraspinatus and infraspinatus

A

subscapular nerve

22
Q

where is the subscapular nerve located

A

c5/ c6

23
Q

vessels of infraspinatus and supraspinatus

A

suprascapular artery

24
Q

innervation of teres minor

A

axillary nerve

25
Q

where is the axillary nerve located

A

c5/ c6

26
Q

vessels of the teres minor

A

posterior circumflex humeral artery

27
Q

where do the nerves and ligaments run in the rotator cuff

A

nerve passes under ligament, artery passes over

28
Q

innervation of subscapularis

A

upper and lower subscapular nerve

29
Q

deltoid attachments

A

lateral 1/3 of clavicle
acromion
spine of scapula
deltoid tuberosity on humerus

30
Q

deltoid actions

A

anterior: flex and medially rotates shoulder
middle: abducts shoulder
posterior: extends and laterally rotates shoulder

31
Q

teres major attachments

A

inferior scapular angle
intertubercular sulcus of humerus

32
Q

teres major actions

A

shoulder adduction, medial rotation, extension

33
Q

innervation of deltoid

A

axillary nerve

34
Q

vessels of deltoid

A

posterior/ anterior circumflex humeral artery
deltoid branch of thoracoacromial

35
Q

innervation of teres major

A

lower subscapular nerve

36
Q

lower subscapular nerve location

A

c5/ c6

37
Q

vessels of teres major

A

circumflex scapular artery
subscapular artery

38
Q

boundaries of quadrangular space

A

inferior margin of teres minor
superior margin of teres major
long head of triceps
surgical neck of humerus

39
Q

what passes through the quadrangular space

A

axillary nerve
posterior circumflex humeral artery

40
Q

supraspinatus tendinopathy

A

tendonitis: inflammation
tendonosis: degeneration

41
Q

what is the most commonly injured rotator cuff muscle

A

supraspinatus

42
Q

factors that contribute to impingement of supraspinatus

A

reduced subacromial space
impaired use of infraspinatus and teres minor
spurring of acromion
impaired use of trapezius
posture abnormalities

43
Q

muscles of shoulder flexion

A

deltoid
pectoralis major
coracobrachialis
biceps brachii

44
Q

muscles of shoulder extension

A

deltoid
latissimus dorsi
teres major
triceps

45
Q

muscles of shoulder abduction

A

deltoid
supraspinatus

46
Q

muscles of shoulder adduction

A

deltoid
pectoralis major
latissimus dorsi
teres major
triceps

47
Q

muscles of internal rotation

A

deltoid
pectoralis major
latissimus dorsi
teres major
subscapularis

48
Q

muscles of external rotation

A

deltoid
infraspinatus
teres minor

Functional Anatomy (6 decks)

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