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Gross Anatomy '14 > Muscles: Test 3 > Flashcards

Muscles: Test 3 Flashcards

0
Q

external intercostal insertion

A

superior border of ribs below

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1
Q

External intercostal origin

A

inferior border of ribs

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2
Q

external intercostal innervation

A

intercostal nerve

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3
Q

external intercostal action

A

during forced inspiration: ELEVATE ribs

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4
Q

internal & innermost intercostal origin

A

inferior border of ribs

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5
Q

internal & innermost intercostals insertion

A

superior border of ribs below

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6
Q

internal & innermost intercostal innervation

A

intercostal nerve

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7
Q

internal & innermost intercostal action

A

during forced respiration:
interosseus part– DEPRESSES ribs
interchondral part– ELEVATES ribs

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8
Q

transversus thoracis origin

A

posterior surface of lower sternum

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9
Q

transversus thoracis insertion

A

internal surface of costal cartilages 2-6

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10
Q

transversus thoracis innervation

A

intercostal nerve

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11
Q

transversus thoracis action

A

weakly depresses ribs

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12
Q

external oblique origin

A

external surfaces of 5th-12th ribs

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13
Q

external oblique insertion

A

linea alba, pubic tubercle, and anterior half of iliac crest

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14
Q

external oblique innervation

A

thoraco-abdominal nerves (anterior rami of T7-T11)

subcostal nerve

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15
Q

external oblique action

A

compress and support abdominal viscera

flex and rotate trunk

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16
Q

internal oblique origin

A

thoracolumbar fascia
anterior 2/3 of iliac crest
connective tissue deep to inguinal ligament

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17
Q

internal oblique insertion

A

inferior borders of 10th-12th ribs
linea alba
pubis via conjoint tendon

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18
Q

internal oblique innervation

A

thoraco-abdominal nerves (anterior rami of T7-T11)

subcostal and first lumbar nerve

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19
Q

internal oblique action

A

compress and support abdominal viscera

flex and rotate trunk

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20
Q

transversus abdominis origin

A

internal surfaces of 7th-12th costal cartilages
thoraco-lumbar fascia
iliac crest
connective tissue deep to inguinal ligament

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21
Q

transversus abdominis insertion

A

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

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22
Q

transversus abdominis innervation

A

thoraco-abdominal nerves (anterior rami of T7-T11)

subcostal and first lumbar nerve

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23
Q

transversus abdominis action

A

compresses and supports abdominal viscera

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24
Q

rectus abdominis origin

A

pubis symphysis

pubic crest

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25
Q

rectus abdominis insertion

A

xiphoid process

5th-7th costal cartilages

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26
Q

rectus abdominis innervation

A

thoraco-abdominal and subcostal nerves

anterior rami of T7-T12 spinal nerves

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27
Q

rectus abdominis action

A 
flexes trunk (lumbar vertebrae)
compresses abdominal viscera
stabilizes and controls tilt of pelvis (antilordosis)
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28
Q

Psoas Major origin

A

transverse processes of lumbar vertebrae

sides of bodies of T12-S1 vertebrae & intervening IV discs

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29
Q

Psoas major insertion

A

by a strong tendon to lesser trochanter of femur

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30
Q

Psoas major innervation

A

lumbar plexus via anterior branches of nerves L2-L4

31
Q

Psoas major action

A

acting inferiorly with iliacus: flexes trunk with sitting and flexes thigh
acting superiorly: flexes vertebral column laterally to balance trunk

32
Q

iliacus origin

A

superior 2/3 of iliac fossa
ala of sacrum
anterior sacro-iliac ligaments

33
Q

iliacus insertion

A

lesser trochanter of femur shaft inferior to it

psoas major tendon

34
Q

iliacus innervation

A

femoral nerve (L2-L4)

35
Q

iliacus action

A

flexes thigh and stabilizes hip joint

acts with psoas major

36
Q

quadratus lumborum origin

A

medial half of inferior border of 12th rib and tips lumbar transverse processes

37
Q

quadratus lumborum insertion

A

iliolumbar ligament

internal lip of iliac crest

38
Q

quadratus lumborum innervation

A

anterior branches of T12

L1-L4 nerves

39
Q

quadratus lumborum action

A

extends and laterally flexes vertebral column

fixes 12th rib during inspiration

40
Q

crura of the diaphragm

A

musculotendinous bundles that arise from the anterior surfaces of the bodies of the superior 3 lumbar vertebrae, the anterior longitudinal ligament and IV discs
Right- larger, arises from the L1-L3/L4 vertebrae
Left- arises from L1-L2/L3

41
Q

Levator ani origin

A

body of pubis
tendinous arch of levator ani
ischial spine

42
Q

levator ani insertion

A 
perineal body
coccyx
anococcygeal ligament
walls of prostate or vagina
rectum
anal canal
43
Q

levator ani innervation

A

nerve to levator ani (branches of S4)
inferior anal nerve
coccygeal plexus

44
Q

levator ani action

A

helps support pelvic viscera

resists increases in intra-abdominal pressure

45
Q

coccygeus origin

A

ischial spine

46
Q

coccygeus insertion

A

inferior end of sacrum and coccyx

47
Q

coccygeus innervation

A

branches of S4 and S5 nerves

48
Q

coccygeus action

A

forms small part of pelvic diaphragm that supports pelvic viscera
flexes coccyx

49
Q

piriformis action

A

pelvic surface of 2nd-4th sacral segments
superior margin of greater sciatic notch
sacrotuberous ligament

50
Q

piriformis insertion

A

greater trochanter of femur

51
Q

piriformis innervation

A

anterior rami of S1 and S2

52
Q

piriformis action

A

laterally rotates hip joint
abducts hip joint
assists in holding head of femur in acetabulum

53
Q

obturator internus origin

A

pelvic surface of ilium and ischium

obturator membrane

54
Q

obturator internus insertion

A

greater trochanter of femur

55
Q

obturator internus innervation

A

nerve to obturator internus (L5,S1,S2)

56
Q

obturator internus action

A

laterally rotates hip joint

assists in holding head of femur in acetabulum

57
Q

tendinous arch of pelvic fascia

A

continuous bilateral band running from the pubis to the sacrum along the pelvic floor adjacent to the viscera

58
Q

ischiocavernosus origin

A

lateral surface of ischiopubic ramus

ischial tuberosity

59
Q

ischiocavernosus insertion

A

embraces crus of penis and clitoris, inserting onto inferior and medial aspects of crus and to perineal membrane medial to crus

60
Q

ischiocavernosus innervation

A

muscular (deep) branch of perineal nerve

branch of pudendal nerve

61
Q

ischiocavernosus action

A

maintains erection of penis or clitoris by compressing outflow veins and pushing blood from root of penis or clitoris into body

62
Q

bulbospongiosus (male) origin

A

median raphe on ventral surface of bulb of penis and perineal body

63
Q

bulbospongiosus (male) insertion

A

surrounds lateral aspects of bulb of penis and most proximal part of body of penis, inserting into perineal membrane.
dorsal aspect of corpora spongiosum and cavernosa
fascia of bulb of penis

64
Q

bulbospongiosus (male) innervation

A

muscular (deep) branch of perineal nerve

branch of pudendal nerve (S2-S4)

65
Q

bulbospongiosus (male) action

A

supports and fixes perineal body/pelvic floor
compresses bulb of penis to expel last drops of urine/semen
assists erection by compressing outflow via deep perineal vein and by pushing blood from bulb into body of penis

66
Q

bulbospongiosus (female) origin

A

perineal body

67
Q

bulbospongiosus (female) insertion

A

passes on each side of lower vagina, enclosing bulb and greater vestibular gland,
inserts onto pubic arch and fascia of corpora cavernosa of clitoris

68
Q

bulbospongiosus (female) innervation

A

muscular (deep) branch of perineal nerve

branch of pudendal nerve (S2-S4)

69
Q

bulbospongiosus (female) action

A

“sphincter” of vagina
assists in erection of clitoris
compresses greater vesticular gland

70
Q

superficial transverse perineal body origin

A

internal surfaces of ischiopubic ramus & ischial tuberosity

compressor urethrea portion only

71
Q

superficial transverse perineal body insertion

A

passes along superior posterior border of perineal membrane to perineal body

72
Q

superficial transverse perineal body innervation

A

muscular (deep) branch of perineal nerve
terminal branch of pudendal nerve (S2-S4)
dorsal nerve of penis of clitoris

73
Q

External anal sphincter origin

A

skin and fascia surrounding anus and coccyx via anococcygeal ligament

74
Q

External anal sphincter insertion

A

passes around lateral aspects of anal canal

inserting into perineal body

75
Q

External anal sphincter innervation

A

inferior anal nerve

branch of pudendal nerve (S2-S4)

76
Q

External anal sphincter action

A

constructs anal canal during peristalsis
resists defecation
supports and fixes perineal body/pelvic floor

Gross Anatomy '14 (4 decks)

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