2. Muscles: Anterior Abdominal Wall

Question 1

Identify

Answer 1

1. External oblique muscle
2. Internal oblique muscle
3. Rectus abdominis muscle

Question 2

Identify 2. O & I

Answer 2

2. Internal oblique muscle

o - Lateral part of the inguinal ligament, iliac crest, and thoracolumbar fascia

I - Inferior aspect of last 4 ribs, linea alba, public crest, and pectineal line

Question 3

Identify 2. Action

Answer 3

2. Internal oblique muscle

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

Question 4

Identify 2. Nerve supply?

Answer 4

• Intercostal nerves (T7-11)
• Subcostal nerve (T12)
• iliohypogastric
• ilioinguinal nerves (L1)

Question 5

Identify 3. O & I

Answer 5

Rectus Abdominis Muscle

O - Pubic crest (lateral tendon), public symphysis (medial tendon)

I - Costal cartilage of ribs 5-7 and xiphoid process

Question 6

Identify 3. Action

Answer 6

3. Rectus abdominis muscle

• Compression of abdomen
• Depression of ribs
• Flexion of spine

Question 7

Identify 3. Nerve supply?

Answer 7

3. Rectus abdominis muscle

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