1. Anterior Abdominal Wall: Superficial Dissection

Question 1

Identify

Answer 1

1. External oblique muscle: muscular part (A) and aponeurotic part (B)
2. Serratus anterior muscle
3. Latissimus dorsi muscle
4. Linea alba

Question 2

Identify 1. O & I

Answer 2

Origin: External oblique muscle arises FROM Inferior border of ribs 5-12.

Insertion: Anterior iliac crest inferiorly and via its broad aponeurosis to the linea alba medially

Question 3

Identify 1. Action

Answer 3

1. External oblique muscle: muscular part (A) and aponeurotic part (B)

• Compression of the abdomen
• Forward flexion of the spine
• Lateral flexion and rotation of the spine

Question 4

Identify 1. Nerve supply?

Answer 4

1. External oblique muscle: muscular part (A) and aponeurotic part (B)

→ Intercostal nerves (T7- 11) and subcostal nerve (T12)