Muscles of the Brachial Synsarcosis Flashcards

1
Q

Origin of trapezius

A

Cervical: mid-dorsal aponeurosis
Thoracic: dorsal spines of thoracic vertebrae

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2
Q

Insertion of trapezius

A

Spine of scapula

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3
Q

Action of cervical trapezius

A

retraction

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4
Q

Action of thoracic trapezius

A

protraction of forelimb and elevation of shoulder

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5
Q

Innervation of trapezius

A

Cranial nerve XI (Spinal accessory nerve)

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6
Q

Blood supply of trapezius

A

Subscapular artery

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7
Q

Origin of brachiocephalicus

A

clavicular intersection

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8
Q

Insertion of brachiocephalicus

A

neck and skull and the humerus

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9
Q

Action of brachiocephalicus

A

protraction and moves neck laterally

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10
Q

Innervation of brachiocephalicus

A

Cranial nerve XI (Spinal accessory) and axillary

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11
Q

Origin of omotransversarius

A

Wing of the atlas

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12
Q

Insertion of omotransversarius

A

Distal scapular spine (horses) or acromion

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13
Q

Innervation of omotransversarius

A

cranial nerve XI (spinal accessory) and cervical

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14
Q

Action of omotransversarius

A

protraction

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15
Q

Omotransversarius in cows is…

A

indistinct (rudimentary)

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16
Q

Omotransversarius in horses is…

A

fused with brachiocephalicus (no acromion)

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17
Q

Origin of lat dorsi

A

thoracolumbar fascia (continuous with fascia)

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18
Q

Insertion of lat dorsi

A

humerus on the teres major tubercle

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19
Q

Action of lat dorsi

A

retraction and flexion of the shoulder (flexion because it crosses over the shoulder)

20
Q

Innervation of lat dorsi

A

thoracodorsal

21
Q

Blood supply of lat dorsi

A

Thoracodorsal

22
Q

Origin of pectoralis

A

Sternum

23
Q

Insertion of pectoralis

A

tubercles of the cranial humerus

24
Q

Innervation of pectoralis

A

pectoral and lateral thoracic

25
Q

Blood supply of pectoralis

A

pectoral

26
Q

Action of pectoralis

A

both superficial and deep: adduction; superficial: extend shoulder; deep: flex shoulder

27
Q

Origin of rhomboideus

A

R capitus (carnivores only): nuchal crest; R cervicis and R thoracis: dorsal neck and thorax, respectively

28
Q

Insertion of rhomboideus

A

dorsal scapula and cartilage

29
Q

Innervation of rhomboideus

A

Dorsal cervical and thoracic spinal nerves

30
Q

Blood supply of rhomboideus

A

arteries in neck

31
Q

Action of rhomboideus

A

retraction

32
Q

Origin of thoracic serratus ventralis

A

ribs

33
Q

Origin of cervical serratus ventralis

A

cervical transverse processes

34
Q

Insertion of serratus ventralis

A

Subscapular fossa specifically the facies serrata

35
Q

Innervation of serratus ventralis

A

Long thoracic

36
Q

Blood supply of serratus ventralis

A

various collaterals

37
Q

Action of serratus ventralis

A

bears weight, shifts weight, raises thorax, protracts (thoracic) and retracts (cervical)

38
Q

Cervical serratus ventralis (protracts or retracts)

A

retracts

39
Q

Thoracic serratus ventralis (protracts or retracts)

A

protracts

40
Q

What animal is the subclavius found in in this course

A

horses only

41
Q

Origin of subclavius

A

sternum and costal cartilage

42
Q

Insertion of subclavius

A

supraspinatus and shoulder fascia

43
Q

Action of subclavius

A

retracts

44
Q

Innervation of subclavius

A

pectoral

45
Q

What muscle prevents adduction

A

rhomboids

46
Q

what muscle prevents abduction

A

pectorals