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Anatomy 1 > Extrinsic Muscles of the Thoracic Limb > Flashcards

Extrinsic Muscles of the Thoracic Limb Flashcards

1
Q

Descending Superficial Pectoral Muscle ORIGIN

A

1st sternebra

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2
Q

descending superficial pectoral muscle INSERTION

A

crest of the greater tubercle of the humerus

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3
Q

transverse superficial pectoral muscle ORIGIN

A

first 2 or 3 sternebra

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4
Q

transverse superficial pectoral muscle INSERTION

A

crest of the greater tubercle of the humerus

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5
Q

superficial pectorals ACTION

A

adduct the limb when not weight bearing; prevent abduction of the limb when weight bearing

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6
Q

deep pectoral muscle ORIGIN

A

ventral part of the sternum; fibrous raphe of muscles (deep abdominal fascia at caudal end of sternum)

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7
Q

deep pectoral INSERTION

A

muscle and tendon mainly at lesser tubercle of the humerus’ aponeurosis to greater tubercle and crest; caudal part: medial brachial fascia

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8
Q

deep pectoral ACTION

A

pull trunk cranially, when not bearing weight, draw limb caudally and flex shoulder joint – abduct limb

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9
Q

braciocephalicus PARTS

A

cleidobrachialis (caudal) , cleidocephalicis (cranial) (cleidomastoideus, cleidocervialis), clavicular intersection (middle)

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10
Q

cleidobrachialis ORIGIN

A

(movable) clavicular intersection

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11
Q

cleidobrachialis INSERTION

A

distal end of the caudal border of the humerus

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12
Q

cleidocervicalis ORIGIN

A

clavicular intersection

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13
Q

cleidocervicalis INSERTION

A

cranial half of mid dorsal raphe, nuchal crest of occipital bone

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14
Q

cleidomastoideus ORIGIN

A

clavicular intersection

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15
Q

cleidomastoideus INSERTION

A

mastoid process on the temporal bone of the skull

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16
Q

brachiocephalicus ACTION

A

advance limb, extend shoulder joint, draw head and neck to the side

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17
Q

sternocephalicus PARTS

A

occipital and mastoid (at cranial end)

18
Q

sternocephalicus ORIGIN

A

1st sternebra or manubrium

19
Q

occipital sternocephalicus INSERTION

A

nuchal crest of the occipital bone

20
Q

mastoid sternocephalicus INSERTION

A

mastoid process of the temporal bone of the skull

21
Q

sternocephalicus ACTION

A

draw head and neck to the side

22
Q

omotransversarius ORIGIN/ATTACHMENT (caudal end)

A

distal end of the spine of the scapula

23
Q

omotransversarius INSERTION/ATTACHMENT (cranial end)

A

transverse process of the atlas (vertebrae c1)

24
Q

omotransversarius ACTION

A

advance limb or flex neck

25
Q

two muscles that create jugular groove

A

sternocephalicus and brachiocephalicus

26
Q

trapezius ORIGIN

A

median raphe of the neck and supraspinous ligament (c3-t9)

27
Q

trapezius INSERTION

A

spine of the scapula

28
Q

trapezius ACTION

A

elevate and abduct the forelimb

29
Q

latissmus dorsi ORIGIN

A

thoraculumbar fascia from spinous processes of lumbar to last 7 or 8 thoracic vertebrae’ muscular attachment to last 2 or 3 ribs

30
Q

latissmus dorsi INSERTION

A

teres major tuberosity of humerus and teres major tendon

31
Q

latissmus dorsi ACTION

A

draw free limb caudally as in digging and flex shoulder joint

32
Q

rhomboideus PARTS

A

cervical, thoracic, capital

33
Q

rhomboideus capitalis ORIGIN

A

nuchal crest of occipital bone

34
Q

rhomboidues cervicis ORIGIN

A

median fibrous raphe of the neck

35
Q

rhomboideus thoracis ORIGIN

A

spinous processes of the 1st 7 thoracic vertebrae

36
Q

rhomboideus INSERTION

A

dorsal border of the scapula

37
Q

rhomboideus ACTION

A

elevate forelimb and draw scapula against the trunk

38
Q

serratus ventralis PARTS

A

cervicis and thoracis

39
Q

serratus ventralis ORIGIN

A

transverse processes of last 5 cervical vertebrae and first 7 or 8 ribs ventral to their middle

40
Q

serratus ventralis INSERTION

A

dorsomedial third of scapula (serrated face)

41
Q

serratus ventralis ACTION

A

support trunk and depress scapula

Anatomy 1 (2 decks)

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