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FINAL EXAM ANATOMY > MUSCLES OF POTERIOR ABDOMINAL WALL AND PELVIS AND PERINEUM > Flashcards

MUSCLES OF POTERIOR ABDOMINAL WALL AND PELVIS AND PERINEUM Flashcards

(60 cards)

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1
Q

what is the innervation of the external anal sphincter?

A

perineal and inferior anal nerves

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2
Q

what is the action of the external anal sphincter?

A

constrict anal canal

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3
Q

what is the superior attachment of the external anal sphincter?

A

anococcygeal ligament

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4
Q

what is the inferior attachment of the external anal sphincter?

A

perineal body

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5
Q

what is the medial attachment of the obturator internus?

A

-internal surface of obturator membrane and bones

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6
Q

what is the lateral attachment of the obturator internus?

A

medial aspect of greater trochanter or femur

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7
Q

what is the innervation of the obturator internus?

A
  • nerve to obturator internus L5-S1
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8
Q

what is the action of the obturator internus?

A
  • laterally rotates and transversley abducts thigh at hip joint
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9
Q

what is the tendinous arch?

A

the thickened fascia over the obturator internus muscles which provides attachment for pelvic diaphragm.

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10
Q

name the parts of the pelvic diaphragm

A

-(Ischio)coccygeus Levator ani = Iliococcygeus + Pubococcygeus + Puborectalis
-Superficial transverse perineal Bulbospongiosus
-Ischiocavernosus

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11
Q

what is the action for the ischiococcygeus muscle?

A

provide structural support to pelvic structures

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12
Q

what is the innervation for the ischiococcygeus muscle?

A

anterior rami of 4-5 sacral nerves

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13
Q

what is the medial attachment for the ischiococcygeus muscle?

A

ischial spine

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14
Q

what is the lateral attachment for the ischiococcygeus muscle?

A

-anterolateral aspects of sacrum and coccyx

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15
Q

what are the 2 muscles of the pelvic diaphragm?

A
  • coccygeus
    -levator ani mucles
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16
Q

what is the levator ani mucles?

A
  • illiococcoygeus
  • pubococcygeus
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17
Q

what is the iliococcygeus muscle innervation

A

nerve to levator ani muscle

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18
Q

Illiococcygeus action

A
  • fecal continence
  • provide structural support
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19
Q

iliococcygeus medial insertion

A
  • ischial spine and tendinous arch of levator ani
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20
Q

illiococcygeus lateral insertion

A

-coccyx
-iliococcygeal raphe
-anococcygeal ligament

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21
Q

pubococcygeus innervation

A

-nerve to levator ani S3-S4
- inferior anal and perineal nerve

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22
Q

Pubococcygeus action

A
  • structural support
  • urinary fecal continence
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23
Q

Pubococcygeus medial attachment

A

-posterior aspect of body of pubis
- tendinous arch of levator ani

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24
Q

pubococcygeus lateral attachment

A
  • coccyx
    -pubococcygeus tendon
  • perineal body
  • lateral walls of vagina and prostates
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25
puborectalis action
- fecal continence - structural support
26
puborectalis innervation
-nerve to levator ani muscle S3-S4 - inferior anal and perineal nerves
27
puborectalis medial attachment
posterior part of body of pubis
28
puborectalis lateral attachment
fibers around posterior aspect of anorectal junction
29
superficial transverse perineal action
- stabilize perineal body - provide structural support
30
superficial transverse perineal innervation
perineal nerve S2-S4
31
superficial transverse medial attachment
-ischial tuberosity - ramus of ischium
32
superficial transverse lateral attachment
perineal body
33
Bulbospongiosus action
-female- stabilizes perineal body / expresses secretions of greater vestibular glands/ assists in erection of clitoris -male- stabilizes perineal body / expels urine and semen from urethra/ assists in erection of penis
34
Bulbospongiosus innervation
S2-S4 perineal nerve
35
Bulbospongiosus medial attachment
-female- perineal body -male- perineal body and medial raphe on ventral aspect of penis
36
Bulbospongiosus lateral attachment
-female- perineal membrane/ corpora cavernosa of clitoris -male- perineal membrane and dorsal aspects of corpus spongiosum and corpora cavernosa of penis
37
Ischiocavernosus lateral attachment
Ischial tuberosity and ramus
38
ischiocavernosus medial attachment
Crus of clitoris or penis
39
ischiocavernosus innervation
Deep branch of perineal nerve (of pudendal nerve) (S2-S4)
40
ishiocavernosis action
Pushes blood from root of clitoris/penis to body i.e. maintains erection of penis/clitori
41
psoas major innervation
anterior rami of 1st 2nd 3rd lumbar nerves
42
psoas major action
-flexes thigh at hip joint -flexes trunk
43
psoas major superior attachment
-transverse process of L1-L5 vertebrae -vertebral bodies of T12-L5 + discs
44
psoas major inferior attachment
lesser trochanter of femur
45
psoas minor innervation
anterior ramus of 1st lumbar nerve
46
psoas minor action
assists in flexion of trunk
47
psoas minor superior attachment
vertebral bodies of T12-L1 and IV discs
48
psoas minor inferior attachment
iliopectineal eminence and pecten pubis of hip bone
49
iliacus superior attachment
- iliac crest -superior 2/3 of iliac fossa -ala of sacrum -anterior sacroiliac ligamentas
50
iliacus inferior attachment
lesser trochanter of femur via tendon of psoas major
51
iliacus innervation
femoral nerve L2-3
52
iliacus action
-flexes thigh at hip joint -flexes trunk
53
quadratus lumborum action
- extends and laterally flexes trunk -stabilizes 12th rib during inspiration
54
Quadratus lumborum innervation
anterior rami of 12th thoracic and 1st-4th lumbar nerves
55
Quadratus lumborum inferior attachment
-posterior 1/2 of iliac crest and iliolumbar ligament
56
Quadratus lumborum superior attachment
-inferior border of 12th rib -transverse process of 1st-4th lumbar vertebrae
57
diaphragm innervation
-motor = phrenic nerve C3-5 - sensory = phrenic nerves and lower intercostal nerves
58
Diaphragm action
primary muscles of inspiration
59
Diaphragm superior attachment
-xiphoid process - internal surfaces of 7th-12th costal cartilages =ribs -medial and lateral arcuate ligaments -L1-3 vertebrae
60
Diaphragm inferior attachment
central tendon

FINAL EXAM ANATOMY (8 decks)

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