Chapter 11: Muscles of the Trunk Flashcards Preview

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Flashcards in Chapter 11: Muscles of the Trunk Deck (29)
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1
Q

What are the three Erector Spinae Muscles?

“true back muscles”

A
  1. Iliocostalis
  2. Longissimus
  3. Spinalis
2
Q

the function of the erector spinae muscles

A

maintain posture, keep you upright, balance, extend trunk

3
Q

the attachment of the iliocostalis group

A

ilium of the pelvis

4
Q

insertion of the iliocostalis group

A

the angle or body of the rib all the way up the rib cage

5
Q

attachment of the longissimus group

A

fascia of the lumbar region, thiradorsal fascia or thoracolumbar fascia (triangle in the small of the back)

6
Q

Spinalis group attachment

A

thoracolumbar fascia

7
Q

spinoallis group insetion

A

the transverse process of on the length of the vertebral column

8
Q

inervation of the true back muscles

A

dorsal rami

9
Q

the functions of the deepest back muscles

A

extension, flextion, and rotation

10
Q

inervation of the deepest back muscles

A

dorsal rami

11
Q

intransverarii are located where?

A

between the transverse processes

12
Q

rotatores are located where?

A

attach to the spinous processes to the tranverse proccess of the one below

13
Q

multifidus are locted where?

A

the spinous processes of one vertebra to the transverse of the one after the one skipped below

14
Q

interspinales is locted where

A

in between spinous processes

15
Q

what is Lina Alba?

A
  • tough, thick fibrous band that extends from the xiphoid processes to the pubic symphysis
  • the central tendon, attachment of the oblique muscles
  • thick because there are so many tendons attached (3 on each side)
16
Q

where are the rectus abdominals

A
  • two on each side of the lina alba
  • from the coastal cartilage to the pubic tubricals
  • small tendons (tendonous intersections) perpandicular to the lina alba, inersect the muscle, giving the “8 pack” appearence
17
Q

explain the external oblique

A

the most superficial layer

  • contain adoneurosis (sheet like tendon, borad attachment to lina alba)
  • tissue adjacent to rectus
18
Q

explain internal oblique

A
  • fibres run at oblique angles
  • just internal to external oblique
  • attaches to lina alba via it;s apondeurosis (which splits around the rectus)
19
Q

explain the transverse abd. muscles

A
  • fibres run perpandicualar to the lina alba

- apondeurosis runs behind the rectus

20
Q

what is the ingenial ligament?

A

an extension of the oblique muscle

21
Q

the external fibre dirrection

A

toward the front pockets

-anteriorly, medially, inferiorly

22
Q

external inserect onto?

A

illiac crest, pubic symphsis

23
Q

the external originates from?

A

the costal cartilage

24
Q

the internal dirrect is:

A

toward the back pockerts

25
Q

the internal originates from?

A

the iliac crest and the lumbar vertebra

26
Q

the internal inserts onto?

A

costal region

27
Q

the transverse oringates?

A

costal region, lumbar vertbrae, iliac crest

28
Q

the transverse inserts onto?

A

the lina alba

29
Q

the function of the layes of abdominal side muscles

A
  • trunk flexion, extension, rotation

- changes in abdominal pressure