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Anatomy Quarter 2- 2023 > Lecture 10-Organization of Thoracic Limb and Shoulder > Flashcards

Lecture 10-Organization of Thoracic Limb and Shoulder Flashcards

1
Q

The thoracic limbs are primarily adapted for____

A

Catching

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2
Q

Relative to the pelvic limbs the thoracic limbs are ____

A

Shorter and straighter
Attached to body via fibromuscular attachments

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3
Q

What is the shoulder joint made of and called

A

Bones: scapula and humerus
Gleno-numeral joint

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4
Q

What joints are in the elbow and what bones

A

Humero-ulnar, radio-humeral and radio-ulnar

Bones: Humerus, ulna, radius

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5
Q

What joints and bones make up the wrist

A

Radio-carpal, intercarpal, and carpo-metacarpal

Carpus, radius, metacarpals

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6
Q

Name for arm

A

Brachium

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7
Q

Name for forearm

A

Antebrachium

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8
Q

Name for wrist

A

Carpus

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9
Q

Name for forepaw

A

Manus

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10
Q

Rotation of forelimb

A

Forelimb rotates dorsally during development and then ventrally/pronates to bring palmar surface in contact with ground

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11
Q

What composes the pectoral girdle

A

Scapula, clavicle, and coracoid

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12
Q

Coracoid in some mammals

A

small process attached to scapula, above supraglenoid process

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13
Q

The clavicle connects

A

Limbs to thorax

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14
Q

Rotation that moves the Glenoid cranially will ____the limb

A

Advance the limb

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15
Q

Rotation that moves the glenoid ventrally will _____ the limb

A

Retract

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16
Q

What are the intrinsic muscles of the shoulder

A

Supraspinatus, infrapsinatus, teres minor, teres major, deltoideus, subscapularis, coracobrachialis

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17
Q

What are the intrinsic muscles of the lateral scapula and shoulder

A

Deltoideus (acromial and scapular), supraspinatus, teres major, infraspinatus

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18
Q

What are the intrinsic muscles of the medial scapula and shoulder

A

Subscapularis, teres major, coracobrachialis

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19
Q

What muscles elevate the scapula

A

Trapezius and rhomboideus

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20
Q

What muscles depress the scapula

A

Serrated ventralis

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21
Q

What muscles advance glenoid cranially

A

Trapezius, omonotransversarius, brachiocephalicus

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22
Q

What muscles retract glenoid ventrally

A

Trapezius, lattismus dorsi, pectoralis profundus

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23
Q

What muscles adduct the scapula

A

Rhomboideus

24
Q

What muscles extend the GH joint

A

Supraspinatus, brachiocephalicus, triceps brachii

25
Q

What muscles flex the GH joint

A

Biceps brachi, teres major, teres minor, latissimus dorsi, pectoralis profundus

26
Q

What muscles adduct the GH joint

A

Pectoralis profundus, subscapularis, coracobrachialis

27
Q

When the limb is advanced and fixed _____ will pull the trunk cranially to advance the body

A

Deep pectoral muscles

28
Q

When the limb is not supporting weight the _____ will draw limb causally and flexes shoulder joint

A

Deep pectoral muscles

29
Q

what muscle pulls the free limb throughout the swing phase

A

Brachiocephalicus

30
Q

The thorax is suspended from the ground by

A

Muscular sling- synsarcosis

31
Q

What muscles primarily form supportive sling for pectoral girdle

A

Serratus ventralis and pectoralis profundus

32
Q

What is the role of the supportive sling in pectoral girdle

A

Prevent thorax from collapsing and also stabilize scapula against external forces and thus prevent unwanted displacement or rotation

33
Q

Where does the suprascapular nerve originate

A

C6-C7

34
Q

What muscles does the suprascapular innervate

A

Supraspinatus and infraspinatus

35
Q

Where does musculocutaneous nerve originate

A

C7-C8

36
Q

What muscles does musculocutaneous innervate

A

Biceps brachii, brachialis coracobrachialis

37
Q

Where does subscapular originate

A

C6-C7

38
Q

What muscles does the subscapular innervate

A

Subscapularis

39
Q

Where does the axillary nerve originate

A

C7-C8

40
Q

What muscles does axillary nerve innervate

A

Deltoideus, teres major, teres minor

41
Q

Where does the radial nerve originate

A

C7-T1

42
Q

What muscles does the radial nerve innervate

A

triceps brachii, extensor carpi radial is, ulnaris lateral is, common digital extensor, lateral digital extensor

43
Q

Where does the median and ulnar nerve originate

A

C8-T1

44
Q

What muscles does the median nerve innervate

A

Flexor carpi radialis, superificial digital flexor, deep digital flexor

45
Q

What muscles does the ulnar nerve innervate

A

Deep digital flexor and flexor carpi ulnaris

46
Q

What is the blood supply from great vessels in dog and pig for thoracic limb

A

Aortic arch—> brachiocephalic trunk and Left subclavian

Brachiocephalic—> R and L common carotid—> R subclavian—-> R. Internal thoracic

Left subclavian—> Left internal thoracic

47
Q

What do the right and left internal thoracic supply

A

Ventral thoracic and abdominal walls

48
Q

What does the right subclavian and left subclavian supply

A

Right and left thoracic limbs

49
Q

What is the blood supply of thoracic limb from great vessels in horse and cattle

A

Aortic arch—> brachiocephalic trunk—> L and R common carotid—> R and L subclavian

50
Q

Describe the blood supply of thoracic limb after subclavian

A

Axillary is a continuation of subclavian, to brachial, to common interosseous (last brachial branch) and median (continuation of brachial)—-> radial off of median and ulnar off of common interosseous—> carpal and metacarpal arteries

51
Q

What artery supplies scapula, axilla, and proximal humerus

A

Axillary artery

52
Q

What artery supplies the distal humerus and proximal forearm

A

Brachial

53
Q

What artery supplies distal forearm

A

Ulnar and radial

54
Q

What arteries supply palmar foot

A

Carpal and metacarpal arteries

55
Q

What are the three branches of the axillary artery

A

Thoracodorsal, internal thoracic and subscapular

56
Q

What artery gives off deep brachial artery

A

Brachial artery

57
Q

What is the venous drainage of thoracic limb

A

Cranial vena cava—> right and left brachiocephalic vein—> left and right subclavian—> right and left external jugular

Anatomy Quarter 2- 2023 (39 decks)

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