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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
What muscles flex the GH joint
Biceps brachi, teres major, teres minor, latissimus dorsi, pectoralis profundus
26
What muscles adduct the GH joint
Pectoralis profundus, subscapularis, coracobrachialis
27
When the limb is advanced and fixed _____ will pull the trunk cranially to advance the body
Deep pectoral muscles
28
When the limb is not supporting weight the _____ will draw limb causally and flexes shoulder joint
Deep pectoral muscles
29
what muscle pulls the free limb throughout the swing phase
Brachiocephalicus
30
The thorax is suspended from the ground by
Muscular sling- synsarcosis
31
What muscles primarily form supportive sling for pectoral girdle
Serratus ventralis and pectoralis profundus
32
What is the role of the supportive sling in pectoral girdle
Prevent thorax from collapsing and also stabilize scapula against external forces and thus prevent unwanted displacement or rotation
33
Where does the suprascapular nerve originate
C6-C7
34
What muscles does the suprascapular innervate
Supraspinatus and infraspinatus
35
Where does musculocutaneous nerve originate
C7-C8
36
What muscles does musculocutaneous innervate
Biceps brachii, brachialis coracobrachialis
37
Where does subscapular originate
C6-C7
38
What muscles does the subscapular innervate
Subscapularis
39
Where does the axillary nerve originate
C7-C8
40
What muscles does axillary nerve innervate
Deltoideus, teres major, teres minor
41
Where does the radial nerve originate
C7-T1
42
What muscles does the radial nerve innervate
triceps brachii, extensor carpi radial is, ulnaris lateral is, common digital extensor, lateral digital extensor
43
Where does the median and ulnar nerve originate
C8-T1
44
What muscles does the median nerve innervate
Flexor carpi radialis, superificial digital flexor, deep digital flexor
45
What muscles does the ulnar nerve innervate
Deep digital flexor and flexor carpi ulnaris
46
What is the blood supply from great vessels in dog and pig for thoracic limb
Aortic arch—> brachiocephalic trunk and Left subclavian Brachiocephalic—> R and L common carotid—> R subclavian—-> R. Internal thoracic Left subclavian—> Left internal thoracic
47
What do the right and left internal thoracic supply
Ventral thoracic and abdominal walls
48
What does the right subclavian and left subclavian supply
Right and left thoracic limbs
49
What is the blood supply of thoracic limb from great vessels in horse and cattle
Aortic arch—> brachiocephalic trunk—> L and R common carotid—> R and L subclavian
50
Describe the blood supply of thoracic limb after subclavian
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
What artery supplies scapula, axilla, and proximal humerus
Axillary artery
52
What artery supplies the distal humerus and proximal forearm
Brachial
53
What artery supplies distal forearm
Ulnar and radial
54
What arteries supply palmar foot
Carpal and metacarpal arteries
55
What are the three branches of the axillary artery
Thoracodorsal, internal thoracic and subscapular
56
What artery gives off deep brachial artery
Brachial artery
57
What is the venous drainage of thoracic limb
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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