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Anatomy > Extrinsic Muscles > Flashcards

Extrinsic Muscles Flashcards

1
Q

Superficial Pectoral Muscles Origin

A

sternum

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2
Q

Superficial Pectoral Muscles Termination

A

greater tubercle of the humerus and cranial humeral border

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3
Q

Superficial Pectoral mm. Action

A

adduct the thoracic limb

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4
Q

Deep Pectoral m. Origin

A

sternum

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5
Q

Deep Pectoral m. Insertion

A

greater and lesser tubercles of humerus

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6
Q

Deep Pectoral m. Action

A

adduct thoracic limb and pull it caudally

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7
Q

Brachiocephalicus Origin

A

clavicular intersection

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8
Q

Brachiocephalicus Termination

A

distal cranial humerus, mastoid process of temporal bone, dorsal midline of neck

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9
Q

Brachiocephalicus Action

A

pull thoracic limb cranially (and/or) depress and pull head and neck laterally

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10
Q

Sternocephalicus Origin

A

thoracolumbar fascia

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11
Q

Sternocephalicus Termination

A

mastoid process of temporal bone

occipital bone

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12
Q

Sternocephalicus Action

A

depress head and neck; draw head and neck laterally

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13
Q

Sternohyoideus Origin

A

sternum

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14
Q

Sternohyoideus Termination

A

basihyoid bone

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15
Q

Sternothyroideus Origin

A

cranial aspect of sternum

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16
Q

Sternothyroideus Termination

A

thyroid cartilage

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17
Q

Omnotransversarius Origin

A

wing of the atlas

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18
Q

Omnotransversarius Termination

A

distal spine of the scapula

19
Q

Omnotransversarius Action

A

pull thoracic limb cranially (and/or) depress and pull head and neck laterally

20
Q

Trapezius Origin

A

cervical part: dorsal neck

thoracic part: dorsal thorax

21
Q

Trapezius Termination

A

spine of scapula

22
Q

Trapezius Action

A

elevate and abduct forelimb

23
Q

Rhomboideus Origin

A

rhomboideus thoracis: dorsal thorax
rhomboideus cervicis: dorsal neck
rhomboideus capitis: occipital bone

24
Q

Rhomboideus Termination

A

dorsal border of scapula and/or scapular cartilage

25
Q

Rhomboideus Action

A

elevate thoracic limb

26
Q

Latissimus Dorsi Action

A

draw thoracic limb caudally, flex or extend humeral joint

27
Q

Extrinsic muscles of the thoracic limb

A

superficial pectoral m., deep pectoral m., brachiocephalicus m., omotransversarius m., trapezius m., rhomboideus m., serratus ventralis m., latissimus dorsi m.

28
Q

What muscle has the superficial cervical lymph node?

A

omotransversarius

29
Q

What lymph node is embedded in the omotransverasarius?

A

superficial cervical lymph node

30
Q

What muscle is the agonist of the omotransversarius?

A

brachiocephalicus

31
Q

What muscle is the agonist of the brachiocephalicus?

A

omotransversarius

32
Q

What is the agonist of the rhomboideus?

A

trapezius

33
Q

What is the agonist of the trapezius?

A

rhomboideus

34
Q

Serratus Ventralis origin

A

Serratus ventralis cervicis: cervical vertebrae

Serratus ventralis thoracis: thoracic wall (ribs)

35
Q

Serratus Ventralis Termination

A

serrated face of scapula

36
Q

Serratus Ventralis Action

A

support the trunk

37
Q

What is the sternocephalicus a partial agonist of?

A

omotransversarius

38
Q

Where is the jugular furrow?

A

between the brachiocephalicus and sternocephalicus- where external jugular lies

39
Q

What muscles originate in the sternum?

A

superficial pectoral, deep pectoral, sternocephalicus, sternohyroideus, sternothyroideus

40
Q

What muscles adduct the thoracic limb?

A

superficial pectoral, deep pectoral, subscapularis, coracobrachialis

41
Q

What muscles depress the head and pull head and neck laterally and pull thoracic limb cranially?

A

brachiocephalicus, omotransversarius, sternocephalicus (only depress head and pull laterally)

42
Q

What muscles terminate on the spine of the scapula?

A

omotransversarius and trapezius

43
Q

What muscles terminate at the teres major tuberosity?

A

Latissimus dorsi and teres major

Anatomy (15 decks)

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