Title Excellence Anatomy (Abdomen).pdf ✅

Excellence for MRCS OSCE By Dr. Rifat & Dr. Hasnat 3 What’s the blood supply and function of rectus abdominis muscle? Blood supply mainly comes from superior and inferior epigastric arteries. Lower five posterior intercostal and subcostal arteries also give contribution. Function: See above table At which plane, the neurovascular bundle lies? Between internal oblique and transversus abdominis Fig – Layers of abdominal wall Fig – Abdominal wall musculature
Excellence for MRCS OSCE By Dr. Rifat & Dr. Hasnat 4 How are anterior and posterior rectus sheath formed? Region Anterior Rectus Sheath Posterior Rectus Sheath Above arcuate line External oblique + Internal oblique (anterior lamina) Internal oblique (posterior lamina) + Transversus abdominis Below arcuate line External oblique + Internal oblique + Transversus abdominis Absent (Transversalis fascia only) INGUINAL CANAL ê Located above the inguinal ligament. ê The inguinal canal is 4cm long. ê The superficial ring is located anterior to the pubic tubercle. ê The deep ring is located approximately 1.5-2cm above the half way point between the anterior superior iliac spine and the pubic tubercle. Boundaries of inguinal canal Mnemonic “MALT” Roof (Superior wall) “2 Muscles” Internal oblique Muscle Transversus abdominis Muscle Anterior wall “2 Aponeurosis” External oblique Aponeurosis Internal oblique Aponeurosis Floor (Inferior wall) “2 Ligaments” External oblique aponeurosis Inguinal Ligament Lacunar Ligament Posterior wall “2 Ts” Transversalis fascia Conjoint Tendon Laterally Internal ring Transversalis fascia Fibres of internal oblique Medially External ring Conjoint tendon