Anatomy
Anterior Abdominal Wall
Compiled By Muchiri Simon
Edition: 2024/25
, Medical & Nursing | Anatomy I of IV pages
1. Origin of external oblique
Arise just lateral to the anterior extremities of the lower eight ribs. Upper four interdigitate with serratus
2. Insertion of external oblique
Inserts to the outer half of the iliac crest, inguinal ligament, pubic tubercle, the aponeurosis of the rectus
3. Borders of external oblique
Three borders; a posterior muscular, and an upper and lower aponeurotic. The first two lie free. The latter is
4. Arterial supply of external oblique
Check: Branches of superior and inferior epigastric, superficial epigastric, the lumbar and deep circumflex
5. Borders of lumbar triangle of petit
Anterior border is the posterior margin of external obliquePosterior border is the anterior margin of lat
6. What artery is at risk in a gridiron incision?
The ascending branch of the deep circumflex iliac artery
7. What planes divide the abdomen into nine regions?
Left and right midclavicular lines: extend down to midinguinal pointsIntertubercular plane: runs between the
of the iliac crestsTranspyloric plane: found midway between the jugular notch and the top of the pubic
8. Name the nine abdominal regions
Three rows from superior to inferior:Left and right hypochondral and epigastricLeft and right lumbar and
9. Innervation of external oblique
Lateral cutaneous branches of the lower intercostal and subcostal nerves (T7-12)
10. What are the attachments and significance of the upper border of the external oblique aponeurosis
Runs free from the fifth rib to the xiphisternum. Is the only structure in the anterior rectus sheath above the
11. Innervation of internal oblique
Lower intercostal and subcostal nerves (T7-12) and iliohypogastric and ilioinguinal nerves (L1). The lowest
12. Innervation of transversus abdomens
Lower intercostal and subcostal nerves (T7-12) and iliohypogastric and ilioinguinal nerves (L1). The lowest
13. Innervation of pyrimidalis
Subcostal nerve T12
14. Origin and insertion of the inguinal ligament of Poupart
ASIS to pubic tubercle
15. What happens to the inguinal ligament when the thigh is extended?
The fascia lata pulls the ligament downward in a genlt convexity
16. What abdominal muscles arise from which part of the inguinal ligament?
Anatomy 2024/25 Edition
Anterior Abdominal Wall
Compiled By Muchiri Simon
Edition: 2024/25
, Medical & Nursing | Anatomy I of IV pages
1. Origin of external oblique
Arise just lateral to the anterior extremities of the lower eight ribs. Upper four interdigitate with serratus
2. Insertion of external oblique
Inserts to the outer half of the iliac crest, inguinal ligament, pubic tubercle, the aponeurosis of the rectus
3. Borders of external oblique
Three borders; a posterior muscular, and an upper and lower aponeurotic. The first two lie free. The latter is
4. Arterial supply of external oblique
Check: Branches of superior and inferior epigastric, superficial epigastric, the lumbar and deep circumflex
5. Borders of lumbar triangle of petit
Anterior border is the posterior margin of external obliquePosterior border is the anterior margin of lat
6. What artery is at risk in a gridiron incision?
The ascending branch of the deep circumflex iliac artery
7. What planes divide the abdomen into nine regions?
Left and right midclavicular lines: extend down to midinguinal pointsIntertubercular plane: runs between the
of the iliac crestsTranspyloric plane: found midway between the jugular notch and the top of the pubic
8. Name the nine abdominal regions
Three rows from superior to inferior:Left and right hypochondral and epigastricLeft and right lumbar and
9. Innervation of external oblique
Lateral cutaneous branches of the lower intercostal and subcostal nerves (T7-12)
10. What are the attachments and significance of the upper border of the external oblique aponeurosis
Runs free from the fifth rib to the xiphisternum. Is the only structure in the anterior rectus sheath above the
11. Innervation of internal oblique
Lower intercostal and subcostal nerves (T7-12) and iliohypogastric and ilioinguinal nerves (L1). The lowest
12. Innervation of transversus abdomens
Lower intercostal and subcostal nerves (T7-12) and iliohypogastric and ilioinguinal nerves (L1). The lowest
13. Innervation of pyrimidalis
Subcostal nerve T12
14. Origin and insertion of the inguinal ligament of Poupart
ASIS to pubic tubercle
15. What happens to the inguinal ligament when the thigh is extended?
The fascia lata pulls the ligament downward in a genlt convexity
16. What abdominal muscles arise from which part of the inguinal ligament?
Anatomy 2024/25 Edition
