Abdominal Wall Muscles

Question 1

Rectus Abdominis:

Answer 1

covers front/anterior wall of abdomen, paired vertical muscle

• flexes rectus column & thoracic/lumbar spine
• Intercostal nerve

Question 2

External Oblique:

Answer 2

superficial lateral(side) broad, thin pair of superficial muscles

-lateral flexion of trunk
lateral rotation of trunk
-intercostal nerve

Question 3

Internal Oblique:

Answer 3

(middle layer)
below external oblique
-lateral flexion
-compression of chest downward
-intercostal nerve

Question 4

Transverse Abdonminus:

Answer 4

• Internal posterior layer
• compresses abdominal contents
• intercostal nerve

Question 5

The 3 layers that cover the Antero-lateral/ abdominal wall:

Answer 5

(deep) external oblique
internal oblique
Transverse Abdominus