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ANAT 315 Term 1 > Lecture 2 > Flashcards

Lecture 2 Flashcards

1
Q

What are the three origins of the pectoralis majoe?

A

The anterior surface of clavicle, anterior surface of sternum and external oblique apeunorosis

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2
Q

What is the insertion of the pectoralis major?

A

greater tubercle of humerus

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3
Q

What are the actions of th pectoralis major? (3)

A

Addcucts, flexes, medially rotates arm

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4
Q

What is the innervation of the pectoralis major? (2)

A

medial and lateral pectoral nerve

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5
Q

Pectoralis minor: origin

A

ribs 3-5

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6
Q

What is the insertion of the pectoralis minor?

A

coracoid process of scapula

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7
Q

What is the action of the pectoralis minor?

A

pulls scapula down and anteriorly

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8
Q

What is the innervation of the pectoralis minor?

A

medical pectoral nerve

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9
Q

Subclavius: origin

A

1st rib

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10
Q

Subclavius: insertion

A

interior surface of clavicle

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11
Q

Subclavius: actions (2)

A

pulls down and stablizes clavicle

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12
Q

Subclavius: innervation

A

C5-C6

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13
Q

Serratus anterior: origin

A

surface of ribs 1-8

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14
Q

Serratus anterior: insertion

A

medial border of scapula on costal surface

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15
Q

Serratus anterior: actions (2)

A

protract scapula, elevate ribs

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16
Q

Serratus anterior: inervation

A

long thoracic nerve

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17
Q

Serratus posterior - superior: origin

A

C7-T3 spinous processes

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18
Q

Serratus posterior - superior: insertion

A

superior border of ribs 2-4

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19
Q

Serratus posterior - superior: actions

A

elevate upper ribs

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20
Q

Serratus posterior - superior: innervation

A

T1-T4 ventral rami

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21
Q

Serratus posterior - inferior: origin

A

T11-L2 spinous processes

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22
Q

Serratus posterior - inferior: insertion

A

inferior border of ribs 9-12

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23
Q

Serratus posterior - inferior: actions

A

depresses lower ribs

24
Q

Serratus posterior - inferior: innervations

A

T9-T12 anterior rami

25
Q

External intercostals: origin

A

inferior border of ribs

26
Q

External intercostals: insertion

A

superior border of ribs below

27
Q

External intercostals: action

A

elevate ribs (inspiration)

28
Q

External intercostals: innervation

A

intercostal nerves

29
Q

Internal intercostals: origin

A

inferior border of ribs

30
Q

Internal intercostals: insertion

A

superior border of ribs below

31
Q

Internal intercostals: actions

A

lower ribs (expiration)

32
Q

Internal intercostals: innervation

A

intercostal nerves

33
Q

Innermost intercostals: origin

A

inferior border of ribs

34
Q

Innermost intercostals: insertion

A

superior border of ribs below

35
Q

Innermost intercostals: action

A

lower ribs (experiation)

36
Q

Innermost intercostals: innervation

A

intercostal nerves

37
Q

Transverse Thoracis: origin

A

pleural surface of ribs 2-6 (anteriorly)

38
Q

Transverse Thoracis: insertions (2)

A

posterior surface of sternum, xiphoid process

39
Q

Transverse Thoracis: action

A

lower ribs (expiration)

40
Q

Transverse Thoracis: innervation

A

intercostal nerves

41
Q

Subcostals: origin

A

pleural surface of lower ribs (posteriorly)

42
Q

Subcostals: insertion

A

superior border of ribs below; lower ribs

43
Q

Subcostals: actions

A

confracts, pulls ribs down (expiration)

44
Q

Subcostals: innervation

A

intercostal nerves

45
Q

Diaphragm: origins (3)

A

xiphoid process of sternum, L1-L4 vertebrae, costal arch of ribs 7-12

46
Q

Diaphragm: insertion

A

central tendon of diaphragm

47
Q

Diaphragm: actions (2)

A

contracts and compresses abdomen (inspiration); relaxes, (expiration)

48
Q

Diaphragm: innervation

A

phrenic nerve (C3,4,5 keeps the diaphragm alive)

49
Q

Primary muscles for inspiration (2)

A

external intercostals, diaphragm

50
Q

Ascessories muscles of inspiration (2)

A

scalenes, sternocleidomastoid

51
Q

Primary muscles for expiration (2)

A

internacl intercostals, diagphragm

52
Q

Ascessories muscles of expiration (2)

A

innermost intercostals, anterior abdominal wall

53
Q

Blood supply - anterior - right side (5)

A

arch of aorta - brachiocephalic artery - right subclavian artery - right internal horacic artery - anterior intercostal arteries

54
Q

Blood supply - anterior - left side (4)

A

arch of aorta - left subclavian artery - left internal thoracic artery - anterior intercostal arteries

55
Q

Blood supply - posterior (3)

A

arch of aorta - descedning thoracic aorta - posterior intercostal arteries

56
Q

Venous drainage (4)

A

hemiazygos v - accessory hemiazygos v - azygos v - superior vena cava

ANAT 315 Term 1 (9 decks)

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