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Gross Anatomy > Muscle Facts Exam 1 > Flashcards

Muscle Facts Exam 1 Flashcards

1
Q

Origin of the clavicular head of the pectoralis major

A

Anterior surface of the clavicle

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2
Q

Origin of the sternocostal head of the pectoralis major

A

Anterior surface of the sternum, superior six costal cartilages, external oblique muscle

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3
Q

Insertion of the pectoralis major

A

Intertubercular sulcus of the humerus

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4
Q

Innervation of the pectoralis major

A

Lateral and medial pectoral nerves

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5
Q

Action(s) of the pectoralis major

A

Adducts and medially rotates the humerus, draws scapula anteriorly and inferiorly

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6
Q

Blood supply of the pectoralis major muscle

A

Thoracoacromial artery, pectoral vein

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7
Q

Origin of the pectoralis minor

A

3rd-5th ribs near their costal cartilages

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8
Q

Insertion of the pectoralis minor

A

Coracoid process of the scapula

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9
Q

Innervation of the pectoralis minor

A

Medial pectoral nerve

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10
Q

Blood supply of the pectoralis minor

A

Pectoral branches of the thoracoacromial artery, pectoral vein

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11
Q

Action of the pectorals minor

A

stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall

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12
Q

Origin of subclavius

A

junction of 1st rib and its costal cartilage

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13
Q

Insertion of subclavius

A

inferior surface of clavicle

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14
Q

Innervation of subclavius

A

subclavian nerve

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15
Q

Action of subclavius

A

anchors and depresses clavicle

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16
Q

Blood supply of subclavius

A

clavicular branch of thoracoacromial artery, subclavian artery and vein

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17
Q

Origin of serratus anterior

A

lateral parts of ribs 1-8

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18
Q

Insertion of serratus anterior

A

medial border of scapula

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19
Q

Innervation of serratus anterior

A

long thoracic nerve

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20
Q

Action of serratus anterior

A

protracts scapula and holds against thoracic wall, rotates scapula

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21
Q

Blood supply of serratus anterior

A

lateral thoracic artery and vein

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22
Q

Origin of external intercostals

A

inferior border of ribs

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23
Q

Insertion of external intercostals

A

superior border of ribs below

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24
Q

Innervation of external intercostals

A

intercostal nerve

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25
Q

Action of external intercostals

A

elevates ribs (during forced inspiration)

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26
Q

Blood supply of external intercostals

A

anterior and posterior intercostal artery and vein

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27
Q

Origin of internal intercostals

A

inferior border of ribs

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28
Q

Insertion of internal intercostals

A

superior border of ribs below

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29
Q

Innervation of internal intercostals

A

intercostal nerve

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30
Q

Action of internal intercostals

A

interosseous part depresses ribs, interchondral part elevates ribs (during forced respiration

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31
Q

Blood supply of internal intercostals

A

anterior and posterior intercostal artery and vein

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32
Q

Origin of innermost intercostals

A

inferior border of ribs

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33
Q

Insertion of innermost intercostals

A

Superior border of ribs below

34
Q

Innervation of innermost intercostals

A

Intercostal nerve

35
Q

Action of innermost intercostals

A

Interosseous part depresses ribs and interchondral part elevates ribs (during forced respiration)

36
Q

Blood supply of innermost intercostals

A

Anterior and posterior intercostal artery and vein

37
Q

Origin of diaphragm

A

Xiphoid process, lower 6 costal cartilages, L1-L3 vertebrae

38
Q

Insertion of diaphragm

A

Central tendon

39
Q

Action of diaphragm

A

Most important muscle of respiration, abdominal straining and weight lifting

40
Q

Innervation of diaphragm

A

Phrenic nerve

41
Q

Blood supply of diaphragm

A

Phrenic artery and vein

42
Q

Origin of transversus thoracis

A

Posterior surface of lower sternum

43
Q

Insertion of transversus thoracis

A

Internal surface of costal cartilages 2-6

44
Q

Innervation of transversus thoracis

A

Intercostal nerve

45
Q

Action of transversus thoracis

A

Weakly depresses ribs

46
Q

Blood supply of transversus thoracis

A

Internal thoracic artery and vein

47
Q

Origin of rectus abdominis

A

Pubic symphysis and crest

48
Q

Insertion of rectus abdominis

A

Xiphoid process, 5th-7th costal cartilages

49
Q

Innervation of rectus abdominis

A

Thoracoabdominal and subcostal nerves

50
Q

Action of rectus abdominis

A

Flexes trunk, compresses abdominal viscera, stabilizes and controls tilt of pelvis

51
Q

Blood supply of rectus abdominis

A

Superior and inferior epigastric artery and vein

52
Q

Origin of external oblique

A

External surface of ribs 5-12

53
Q

Insertion of external oblique

A

Linea alba, pubic tubercle, anterior half of iliac crest

54
Q

Innervation of external oblique

A

Thoracoabdominal and subcostal nerve

55
Q

Action of external oblique

A

Compress and support abdominal viscera, flex and rotate trunk

56
Q

Blood supply of external oblique

A

Superior and inferior epigastric artery and vein, lumbar artery and vein

57
Q

Origin of internal oblique

A

Thoracolumbar fascia, iliac crest, connective tissue deep to inguinal ligament

58
Q

Insertion of internal oblique

A

Inferior border of ribs 10-12, linea alba, pubis via conjoint tendon

59
Q

Innervation of internal oblique

A

Thoracoabdominal, subcostal, and first lumbar nerve

60
Q

Action of internal oblique

A

Compress and support abdominal viscera, flex and rotate trunk

61
Q

Blood supply of internal oblique

A

Superior and inferior epigastric artery and vein, lumbar artery and vein

62
Q

Origin of transversus abdominis

A

Internal surface of 7-12 costal cartilages, thoracolumbar fascia, iliac crest, connective tissue deep to inguinal ligament

63
Q

Insertion of transversus abdominis

A

Linea alba with aponeurosis of internal oblique, pubic crest, pubis via conjoint tendon

64
Q

Innervation of transversus abdominis

A

Thoracoabdominal, subcostal, and first lumbar nerves

65
Q

Action of transversus abdominis

A

Compresses and supports abdominal viscera

66
Q

Blood supply of transversus abdominis

A

Superior and inferior epigastric artery and vein, lumbar artery and vein

67
Q

Origin of psoas

A

Transverse process of lumbar vertebrae, sides of body of T12-L5 vertebrae, intervertebral discs

68
Q

Insertion of psoas

A

Strong tendon to a lesser trochanter of femur

69
Q

Innervation of psoas

A

Lumbar plexus

70
Q

Action of psoas

A

Flexes thigh (with iliacus), flexes vertebral column laterally to balance trunk, flexes trunk when sitting (with iliacus)

71
Q

Blood supply of psoas

A

Lumbar artery and vein

72
Q

Origin of quadratus lumborum

A

Inferior border of 12 rib and lumbar transverse process

73
Q

Insertion of quadratus lumborum

A

Iliolumbar ligament and internal lip of iliac crest

74
Q

Innervation of quadratus lumborum

A

Anterior branches of T12 and L1-L4 nerves

75
Q

Action of quadratus lumborum

A

Extend and laterally flexes vertebral column, fixes 12th rib during inspiration

76
Q

Blood supply of quadratus lumborum

A

Lumbar artery and vein

77
Q

Origin of iliacus

A

Iliac fossa, ala of sacrum, anterior sacroiliac ligaments

78
Q

Insertion of iliacus

A

Lesser trochanter of femur, psoas major tendon

79
Q

Innervation of iliacus

A

Femoral nerve

80
Q

Action of iliacus

A

Flexes thigh, stabilizes hip joint

81
Q

Blood supply of iliacus

A

Lumbar artery and vein

Gross Anatomy (3 decks)

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