Muscles of the Abdomen

Question 1

Name the Origin, Insertion, Action, and Nerve for:

Rectus Abdominis

Answer 1

O: Ribs 5-7 & Xiphoid Process

I: Pubic Ramus

A: Flexes Trunk

N: Intercostal N T7-T12

Question 2

Name the Origin, Insertion, Action, and Nerve for:

External Oblique

Answer 2

O: Posterolateral Ribs 5-12

I: Iliac crest & Linea Alba

A: Flex, Ipsilateral Flex, Contra Rot - Trunk

N: Intercostal N T7-T12

Question 3

Name the Origin, Insertion, Action, and Nerve for:

Internal Oblique

Answer 3

O: Iliac Crest & Thoracolumbar fascia

I: Linea Alba & Inferior Ribs

A: Flex, Ipsilateral Flex, Ipsilateral Rot - Trunk

N: Intercostal N T7-T12

Question 4

Name the Origin, Insertion, Action, and Nerve for:

Transverse Abdominus

Answer 4

O: Ribs 6-12, thoracolumbar fascia, iliac crest

I: Linea Alba

A: stabilizes

N: Intercostal N T7-T12