Abdominal Wall

Abdominal wall muscles

Layers (including hernia)

The abdominal wall superficial fascia is made up of mostly a single layer with differing amounts of fat. It is separated at the groin into 2 layers that contain the superficial vessels, nerves and the superficial inguinal lymph nodes. The deep fascia is more membranous and thinner than the superficial and has a large amount of yellow elastic fibers.

Abdominal wall muscles groups

The anterolateral muscles 

  • Obliquus externus – The largest/most superficial of the three flat muscles.
  • Obliquus internus –  Deep to the Obliquus externus.
  • Transversus – Most internal. Deep  to the Obliquus internus.
  • Rectus –  A long flat muscle that travels the whole length of the anterior abdomen. It is separated right to left by the linea alba.
  • Pyramidalis – A small triangular shaped muscle that sits in front of the Rectus in the lower portion of the Abdomen.

The posterior muscles.

  • Psoas major –  A long, spindle-shaped (fusiform) muscle that sits at the Lumbar-Spine to the edge of the lesser pelvis.
  • Psoas minor – A long, thin muscle that sits in front of the Psoas major.
  • Iliacus – A flat, triangular muscle. It fills the iliac fossa.
  • Quadratus lumborum – An irregular muscle. Quadrilateral in shape, wider at the top.

Vascular Anatomy

Here is a list of the Abdominal wall vessels. These are mostly for informational purposes. There is no indication that they are on the Registry exam.

  • Deep arteries
  • Inferior deep epigastric arteries
  • Superior deep epigastric arteries
  • Deep circumflex iliac arteries
  • Musculophrenic arteries
  • Various Superficial arteries
  • Veins — Anterior abdominal wall venous drainage varies more than the arteries though they typically follow the course of the arteries.
  • Collateral flow channels

 

by [googleplusauthor]

The following two tabs change content below.
I am the founder and lead Instructor here at ExamRefresh.com. I strive to help those that are entering the field of Ultrasound to be the best that they can be. Ultrasound is my passion.

Latest posts by Franco (see all)

Speak Your Mind