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Veterinary Anatomy > Muscles of the Shoulder and Arm > Flashcards

Muscles of the Shoulder and Arm Flashcards

1
Q

Origin of the supraspinatus

A

Supraspinous fossa

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2
Q

Insertion of the supraspinatus

A

Greater/lesser tubercles of the humerus

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3
Q

Action of the supraspinatus

A

Extend and stabilize shoulder

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4
Q

Innervation of supraspinatus

A

suprascapular nerve

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5
Q

Blood supply of supraspinatus

A

suprascapular, caudal circumflex humeral, collateral arteries

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6
Q

Origin of infraspinatus

A

Infraspinous fossa

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7
Q

Insertion of infraspinatus

A

greater tubercle of humerus

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8
Q

Innervation of infraspinatus

A

suprascapular nerve

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9
Q

Blood supply of infraspinatus

A

Suprascapular branches

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10
Q

Function of infraspinatus

A

flex and stabilize the shoulder

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11
Q

The tendon of which muscle creates a bursa over the greater tubercle of the humerus, which acts to reduce friction

A

Infraspinatus

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12
Q

Origin of the deltoid m

A

Spine of the scapula +/- acromion

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13
Q

Insertion of the deltoid m

A

Deltoid tuberosity

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14
Q

Action of the deltoid m

A

flex, abduct and stabilize the shoulder

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15
Q

Innervation of deltoid m

A

Axillary n

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16
Q

Blood supply of deltoid m

A

Subscapular branches

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17
Q

Origin of teres major m

A

Caudal border (caudal angle) of scapula

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18
Q

Insertion of teres major m

A

teres major tuberosity of the humerus

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19
Q

Innervation of teres major m

A

Axillary n

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20
Q

Blood supply of teres major m

A

Subscapular a and collateral branches

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21
Q

Action of teres major m

A

Flex shoulder

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22
Q

Origin of subscapularis m

A

subscapular fossa

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23
Q

Insertion of subscapularis m

A

lesser tubercle of humerus

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24
Q

Innervation of subscapularis m

A

Subscapular nn

25
Q

Blood supply of subscapularis m

A

Subscapular a and collateral branches

26
Q

The axial nerve inserts between the border of which two muscles, making it a good landmark?

A

Teres major m and subscapularis m

27
Q

Action of subscapularis

A

Adduct and extend shoulder

28
Q

Origin of coracobrachialis

A

coracoid process of scapula

29
Q

Insertion of coracobrachialis

A

Lesser tubercle of humerus

30
Q

Action of coracobrachialis

A

flex shoulder

31
Q

Innervation of coracobrachialis

A

Musculocutaneous nn

32
Q

What muscle is coracobrachialis commonly fused with in sheep?

A

The medial head of the tricep

33
Q

What is the role of teres MINOR

A

Flexes and stabilizes the shoulder

34
Q

Origin of triceps brachii

A

Caudal edge of scapula or humerus

35
Q

Innervation of triceps brachii

35
Q

Insertion of triceps brachii

35
Q

Origin of tensor fascia antibrachii

A

Latissimus dorsi

36
Q

Blood supply of triceps brachii

A

Subscapular branches and brachial artery

37
Q

What are the heads of the triceps brachii

A

Long head, lateral head, medial head, accessory head (best appreciated in dog)

38
Q

Insertion of tensor fascia antibrachii

A

Olecranon and antebrachial fascia

39
Q

Innervation of tensor fascia antibrachii

40
Q

Action of tensor fascia antibrachii

A

Extends and supports elbow

41
Q

Role of triceps brachii

A

Extend and stabilize the elbow

42
Q

Tensor fascia antibrachii is most caudal in ___________ and most medial in ________

A

sheep; rabbits

43
Q

Origin of anconeus

A

Olecranon fossa

44
Q

Insertion of anconeus

45
Q

Innervation of anconeus

46
Q

Action of anconeus

A

Extends and supports elbow; provides fatigue resistance when standing to keep elbow straight without using the triceps brachii

47
Q

Origin of biceps brachii

A

Supraglenoid tubercle of scapula

48
Q

Insertion of biceps brachii

A

radial tuberosity of radius

49
Q

Action of biceps brachii

A

Flex elbow and extend shoulder

50
Q

Innervation of biceps brachii

A

musculocutaneous

51
Q

What does the biceps brachii run through on its way from origin to insertion

A

The intertubercular groove

52
Q

What is the role of the intramuscular tendon and which muscle is it a part of

A

In the horse, is an energy saving mechanism; part of the biceps brachii

53
Q

Origin of brachialis

A

Brachial groove of humerus

54
Q

Insertion of brachialis

55
Q

Innervation of brachialis

A

musculocutaneous

56
Q

Action of brachialis

A

flex elbow

Veterinary Anatomy (16 decks)

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