Flashcards in Abdominal Wall Deck (20)
What is the difference between Camper's fascia and Scarpa's fascia?
Camper's fascia is the fatty layer that is more superficial, Scarpa's fascia is the deeper membranous layer.
What happens to the muscles at the tip of the ninth costal cartilage?
They turn aponeurotic.
Which ribs does the external oblique originate from?
The inferior 8, it has 8 digitations
Which way do the fibres of the external oblique run?
Inferio-medially, same as the external intercostals.
Where does the external oblique insert?
Along whole iliac crest, and then on pubic tubercle. Free border between anterior superior iliac spine and pubic symphysis = inguinal ligament.
Where does the internal oblique arise?
Lumbar fascia, iliac crest, lateral 2/3 of inguinal ligament.
Which muscles from the conjoint tendon?
Internal oblique and transversus abdominis.
Which way do the fibres of the internal oblique run?
Superio-medially, same as internal intercostals.
Where does the transversus abdominis originate?
Lumbar fascia, iliac crest, lateral 1/3 of inguinal ligament, costal margin.
Which costal cartilages does rectus abdominis attach to?
Costal cartilages 5-9
What are tendinous intersections?
White lines that attach the muscle to the anterior rectus sheath. There are no tendinous intersections posteriorly.
What is the rectus sheath like above the anterior superior iliac spine (and arcuate line)?
The internal oblique inserts either side of the rectus abdominis muscle, the external oblique is anterior, the transversus abdominis and transversalis fascia are posterior.
What is the rectus sheath like below the anterior superior iliac spine (and arcuate line)?
Only the transversalis fascia and peritoneum are posterior to the rectus abdominis muscles, the transversus abdominis + internal oblique + external oblique are anterior.
What is the name of the curved line either side of rectus abdominis that meets the costal margin at the tip of the 9th costal cartilage?
What 5 things make up the posterior abdominal wall?
Quadratus lumborum (accessory muscle of expiration)
Psoas major (hip flexor)
Iliacus (hip flexor)
Where does quadratus lumborum arise?
Arises on iliac crest and transverse process of L5, attaches to inferior aspect of 12th rib.
Where does psoas major arise and insert?
Arises from vertebral bodies of T12-L5, and inserts on lesser trochanter of femur.
Where does iliacus arise and insert?
Lies in iliac fossa and inserts on lesser trochanter.
How long is the inguinal canal?