Abdominal Wall Muscles Flashcards Preview

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Flashcards in Abdominal Wall Muscles Deck (11):
1

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External Oblique

 

Origin: by fleshy strips from outer surfaces of lower eight ribs

Insertion: most fibers insert into linea alba, some into pubic crest and tubercle and iliac crest

 

Bilaterally flex vertebral column and compress abdominal wall, unilaterally aid in trunk rotation and lateral flexion

2

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Internal Oblique

 

Origin: lumbar fascia, iliac crest, and inguinal ligament (which runs along ischium)

Insertion: linia alba, pubic crest, last three or four ribs and coastal margin

 

Same action as external obliquie: bilaterally flex vertebral column and compress abdominal wall, unilaterally aid in trunk rotation and lateral flexion

3

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Transversus Abdominis

 

Origin: inguinal ligament, lumbar fascia, cartilages of last six ribs, iliac crest

Insertion: linea alba, pubic crest

 

Compresses abdominal contents

4

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Rectus abdominis

 

Origin: pubic crest and symphysis

Insertion: xiphoid process and costal cartilages of ribs 5-7

 

Flex and rotate lumbar region of vertebral column

5

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Quadratus lumborum

 

Origin: iliac crest and lumbar fascia

Insertion: transverse processes of upper lumbar vertebrae and lower margin of 12th rib

 

Flexes vertebral column laterally, maintains uprights posture, assists in forced inspiration

6

Blue part on top

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Urogenital diaphragm

 

It's fake

7

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Ischiocavernosus

 

Stops drainage and maintains erection of penis or clitoris

8

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Bulbospongiosus

 

Empties male urethra, assists in erection of clitoris or penis

9


What muscles make up the pelvis diaphragm

1. Levator ani

2. Coccygeus

10

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Levator ani

 

Supports and maintains position of pelvic viscera

(part of pelvic diaphragm)

11

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Coccygeus

 

Supports pelvic viscera

(part of pelvic diaphragm)