Anatomy - Abdomen Flashcards
(229 cards)
9 regions of the abdomen
Right and left hypochondrium Right and left lumbar Right and left inguinal Epigastrium Umbilical Hypogastrium
Origin of external oblique
Lower 8 ribs
Insertion of external oblique (6)
Xiphoid process Linea alba Pubic crest Pubic tubercle Iliac crest Is the origin of the inguinal ligament
Origin of internal oblique (3)
Lumbar fascia
Iliac crest
Lateral 2/3rds inguinal ligament
Insertion of internal oblique (4)
Lower 3 ribs and costal cartilage
Xiphoid process
Linea alba
Symphysis pubis
Innervation of external oblique (3)
Lower 6 thoracic nerves
Iliohypogastric nerve
Ilioinguinal nerve
Innervation of internal obliques (3)
Lower 6 thoracic nerves
Iliohypogastric nerve
Ilioinguinal nerve
Origin of transversus (4)
Lower 6 costal cartilages
Lumbar fascia
Iliac crest
Lateral third inguinal ligament
Insertion of transversus (3)
Xiphoid process
Linea alba
Symphysis pubis
Nerve supply of transversus (3)
Lower 6 thoracic nerves
Iliohypogastric nerve
Ilioinguinal nerve
Origin of rectus abdominis (2)
Symphysis pubis
Pubic crest
Rectus abdominis (2)
5th-7th costal cartilages
Innervation of rectus abdominis
Lower 6 thoracic nerves
The rectus sheath is formed from the aponeurosis of
External obliques
Internal obliques
Transversus
Above the level of the costal margin the anterior rectus sheath is formed by
The external oblique aponeurosis.
Above the level of the costal cartilage the posterior rectus sheath
doesn’t exist
From the costal cartilage to the anterior iliac spine the anterior rectus sheath is formed by
the external oblique aponeurosis and the anterior part of the split internal oblique aponeurosis
From the costal cartilage to the anterior iliac spine the posteior rectus sheath is formed by
the posterior part of the split internal oblique aponeurosis and the transversus abdominus aponeurosis
From the ASIS to the pubis the anterior rectus sheath is formed by
the combined aponeuroses of external oblique, internal oblique and transversus
From the ASIS to the pubis the posterior rectus sheath is
absent. Rectus abdominis lies on transversalis fascia, thickened to form the iliopubic tract
The rectus sheath contains (3)
Posterior intercostal nerves
Superior epigastric artery
Inferior epigastric artery
The actions of the abdominal muscles (3)
Truncal movement
Rib depression
Visceral support
Place and role of the inguinal canal
An oblique passage through the lower part of the abdominal wall. Allows passage of structures from testis to the abdomen or the round ligament of the uterus from the uterus to the labium majus. 6cm long lying parallel and above the inguinal ligament from the inguinal ring to the superficial inguinal ring
Roof of inguinal canal
Arching lower fibres of internal oblique and transversus muscles