Rectus Sheath Flashcards
What is the rectus sheath separated into
Upper 3/4
Lower 3/4
What is the anterior upper 3/4 rectus sheath composed of
External and internal obliques
What is the posterior upper 3/4 rectus sheath composed of
Internal obliques and transversus abdominis
What is the anterior lower 1/4 rectus sheath composed of
External and internal obliques
Transversus abdominis
What is the posterior lower 1/4 rectus sheath composed of
Absent
Has direct contact with the transversalis abdominis
What arcuate line
Line between the upper 3/4 and lower 3/4
What is the function of the rectus sheath
Protect contents which are enclosed in it
What happens to the rectus sheath superior to the costal margin
External oblique forms the anterior
No posterior
What is contained in the rectus sheath
Rectus abdominis and pyramidalis muscles
Veins
Lymphatic vessels
Termination of lower 5 intercostal nerves (T7-11) and 12th thoracic nerve (T12)
Superior and inferior epigastric arteries
What is the linea alba
Thickening of the rectus sheath between rectus abdominis running xiphoid process to pubic symphysis
