02 Trunk OIAN Flashcards Preview

7202 Anatomy > 02 Trunk OIAN > Flashcards

Flashcards in 02 Trunk OIAN Deck (57):
1

iliocostalis

ORIGINS

  • lumbosacral fascia
  • iliac crest

2

iliocostalis

INSERTIONS

angles of ribs

3

iliocostalis

ACTIONS

extends and laterally flexes vertebral column

4

iliocostalis

INNERVATIONS

dorsal rami

5

longissimus

ORIGINS

transverse processes of vertebrae

6

longissimus

INSERTIONS

transverse processes of vertebrae

7

longissimus

ACTIONS

  • extends
  • ipsilateral rotation

8

longissimus

INNERVATIONS

dorsal rami

9

spinalis

ORIGINS

spinous processes of thoracic and upper cervical vertebrae

10

spinalis

INSERTIONS

spinous processes of thoracic and upper cervical vertebrae

11

spinalis

ACTIONS

extends and laterally flexes vertebral column

12

spinalis

INNERVATIONS

dorsal rami

13

multifidus

ORIGINS

  • posterior surface of sacrum
  • medial PSIS
  • posterior sacroiliac ligaments
  • facet joint capsule
  • common tendon of erector spinae
  • mammilary process of lumbar vertebrae

14

multifidus

INSERTIONS

  • spanning 2-4 vertebrae
  • inserts into spinous process of vertebrae above

15

multifidus

ACTIONS

  • extends spine
  • contralateral rotation
  • involved in postural control
  • prevents segmental instability

16

multifidus

INNERVATIONS

dorsal rami

17

rotatores

ORIGINS

transverse processes

18

rotatores

INSERTIONS

lamina of the vertebrae above

19

rotatores

ACTIONS

  • extends spine
  • contralateral rotation
  • involved in postural control
  • prevents segmental instability

20

rotatores

INNERVATIONS

dorsal rami

21

quadratus lumborum

ORIGINS

  • iliolumbar ligament
  • crest of ilium

22

quadratus lumborum

INSERTIONS

  • rib 12
  • transverse process of L1-4

23

quadratus lumborum

ACTIONS

  • lateral flexion of spine
  • elevation of pelvis

24

quadratus lumborum

INNERVATIONS

ventral rami

25

rectus abdominis

ORIGINS

pubic crest and symphysis

26

rectus abdominis

INSERTIONS

  • costal cartilages of ribs 5-7
  • xiphoid process

27

rectus abdominis

ACTIONS

  • trunk flexion
  • posterior pelvic tilt

28

rectus abdominis

INNERVATIONS

ventral rami

29

external oblique (anterior fibers)

ORIGINS

  • external surfaces of ribs 5-7
  • blends with serratus anterior

30

external oblique (anterior fibers)

INSERTIONS

abdominal aponeurosis into linea alba

31

external oblique (anterior fibers)

ACTIONS

  • bilaterally: trunk flexion
  • unilaterally: contralateral rotation, ipsilateral flexion

32

external oblique (anterior fibers)

INNERVATIONS

ventral rami

33

external oblique (lateral fibers)

ORIGINS

  • external surface of 9th rib
  • blends with serratus and external surfaces of ribs 10-12
  • blends with lats

34

external oblique (lateral fibers)

INSERTIONS

  • inguinal ligament
  • ASIS
  • pubic tubercle
  • anterior half of iliac crest

35

external oblique (lateral fibers)

ACTIONS

  • bilaterally: trunk flexion
  • unilaterally: contralateral rotation, ipsilateral flexion

36

external oblique (lateral fibers)

INNERVATIONS

ventral rami

37

internal oblique (anterior fibers)

ORIGINS

  • lateral 2/3 of inguinal ligament
  • anterior 1/3 of iliac crest to ASIS

38

internal oblique (anterior fibers)

INSERTIONS

linea alba by means of aponeurosis, with TrA into pubic crest

39

internal oblique (lateral fibers)

ORIGINS

  • middle 1/3 of iliac crest
  • thoracolumbar fascia

40

internal oblique (lateral fibers)

INSERTIONS

Inferior borders of ribs 10-12 and linea alba by means of aponeurosis

41

internal obliques

ACTIONS

bilateral: flexes the trunk and compress the abdominal viscera. 

unilateral: performs ipsilateral rotation and ipsilateral side bending. 

42

internal obliques

INNERVATIONS

ventral rami

43

transversus abdominis

ORIGINS

  • Costal cartilages of lower six ribs 
  • meshes with diaphram, thoraco-lumbar fascia, anterior 3/4 of iliac creast and inguinal ligament

44

transversus abdominis

INSERTIONS

linea alba by means of aponeurosis and pubic crest

45

transversus abdominis

ACTIONS

compress abdominal viscera

46

transversus abdominis

INNERVATIONS

ventral rami

47

principle muscle of the pelvic floor

levator ani

48

4 muscles of the levator ani

  • pubicoccygeus
  • tendineus
  • puborectalis
  • iliococcygeus

49

pubococcygeus significance

  • primary contributor of levator ani
  • primary components of urogenital openings

50

levator ani

ORIGINS

  • pubic bone
  • arcus tendineus
  • ischial spine

51

levator ani

INSERTIONS

  • perineal body
  • coccyx
  • walls of prostate
  • vagina
  • urethra
  • rectum
  • anal canal

52

levator ani

ACTIONS

  • supports pelvic viscera
  • raises pelvic floor
  • increases abdominal pressure (valsalva)
  • voluntary control of bladder and bowel

53

levator ani

INNERVATIONS

  • Ventral rami 
  • Puborectalis by pudendal nerve, S2-4

54

coccygeus

ORIGINS

  • ischial spine
  • sacrospinus ligament

55

coccygeus

INSERTIONS

  • inferior sacrum
  • coccyx

56

coccygeus

ACTIONS

  • supports pelvic viscera
  • pulls coccyx anterior

57

coccygeus

INNERVATIONS

ventral rami