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Flashcards in Abdominal muscles Deck (13)
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1

Rectus Abdominis origin?

pubic crest & symphysis

2

External oblique origin?

outer surface of lower 8 ribs

3

Internal oblique origin?

lumbar fascia, iliac crest, & inguinal ligament

4

Transverse abdominis origin?

inguinal ligament, lumbar fascia, cartilages of last 6 ribs, iliac crest

5

Rectus Abdominis insertion?

xyphoid process & costal cartilages of ribs 5-7

6

External oblique insertion?

linea alba via aponeurosis

7

Internal oblique insertion?

linea alba, pubic crest, last 3 or 4 ribs, & costal margin

8

Transverse abdominis insertion?

linea alba, pubic crest

9

Rectus Abdominis action?

• flex & rotate lumbar region of vertebral column
• fix & depress ribs
• stabilize pelvis during
walking
• increase intra-abdominal
pressure

10

External oblique action?

• when together, synergist to rectus abdominis, flex vertebral column & com- press abdominal wall
• when alone, synergist to muscles of back, roate & lateral flexion of trunk

11

Internal oblique action?

• when together, synergist to rectus abdominis, flex vertebral column & com- press abdominal wall
• when alone, synergist to muscles of back, roate & lateral flexion of trunk

12

Transverse abdominis action?

• compresses abdominal contents

13

What are the innervations of abdominal muscles?

Intercostal nerves