Anatomy Abdominal Wall week6 Flashcards
What is the Abdomen divided into ?
4 Quadranrs
9 Regions
What is the Transphyloric plane?
- A transverse plane located halfway between the jugular notch and the pubic crest
Where is the subcutaneous layer located of the abdominal wall?
- Between the skin and muscular layer of thhe abdominal wall
What components does the subcutaneous layer consist of and their alternative names
- -Superficial Fatty layer(campers fascia)
- Deep membranous layer(scarpas fascia)
What does the 1st components of the subcutaneous layer contain?
- Variable amounts of fat
Explain the structure and function of 2nd component in the subcutaneous layer?
- A Tough ,fibrous sheet
- Covers the lower anterior abdominal wall
- Extends into the perineum , where it becomes continous with the superficial perineal fascia
Name the flat muscles that make up the anterior and lateral walls of the muscular layer
- Exteral oblique
- Internal oblique
-Transversus oblique
Name the 3 key structures of the 3 flat muscles
- Inguinal ligament
-Conjoined tendon - Linea Alba
What is the inguinal ligament fomed by?
- Thickened edge of the external oblique aponeurosis
What is the conjoined tendon formed by?
- Formed by the aponeroses of the internal oblique and trasnversus abdominis
What is the linea alba formed by
- overlapping aponeuroses from the xiphoid process to the pubis
What is the structure of the Rectus Sheat
Include:
- What it encloses
- What it is formed by
-Encloses the rectus abdominis and pyramidalis muscles.
-Formed by the aponeuroses of anterolateral abdominal muscles
What is the function of the anterior layer in the rectus Sheath
- It extends the entire length of the rectus muscle
Where does the posterior layer end in the rectus sheath and where is it present
- At the arcuate line
- Present in the upper 2/3 of the rectus muscle
What is the anterior layer above the arcuate line formed by?
- External oblique aponeurosis and the anterior leaf of the internal oblique aponeurosis
What is the posterior layer above the arcuate layer formed by ?
- Transversus abdominis aponeurosis and the posteoir leaf of the internal oblique aponeurosis.
What is below the arcuate line?
All the 3 aponerosis: External oblique, internal oblique, transversus abdominis
What is the function of the posterior wall
- Forms the posterior boundary of the abdominal cavity
What are the 3 main muscle in the posterior wall
- 5 Primary Muscles
- Iliopsoas muscle
- Thoracic diaphragm
What are the names of the 5 primary muscles
- Psoas Major
- Psoas Minor
- Quadratus lumborum
-iliacus - diaphragm
What is the role of the Thoracic diaphragm as a muscle in the posterior wall
-Forms the superior portion of the abdominal wall
What is the Iliopsoas muscle formed by
Union of the psoas major and iliacus
Name the three types of facia in the Posterior abdominal wall
- Psoas Fascia
- Thoracolumbar fascia
- Endoabdominal fascia
Name the 3 different types of endoabdominal fascia
- Transversalis fascia
- Diaphgramatic fascia
-Psoas fascia
What does the psoas fascia attach to
which is 1 of the fascias in the fascias of the posterior abdominal wall
Attaches medially to the lumbar vertebrae
What does the Thoracolumbar fascia enclose?
What does it fuse with ?
( One of the three main fascias in the posterior abdominal wall)
-Quadratus lumborum
-Aponeurosis of the transverus Abddominis
What is the function of the endoabdominal fascia?
-Lines the internal surface of the abdominal wall muscles
Where is the iliopubic Tract
Inguinal region
What is the structure of the internal surface of the anterior Abdominal wall
- Lined by transversalis fascia
- Contains variable amounts of fat
Name the three structures that create the peritoneal folds
( in the internal surface of the Anterior Abdominal wall)
- Median Umbilical cord
- Medial Umbilical Folds
- Lateral Umbilical Folds
Describe the type of fold the structures creating the peritoneal folds have
Medial Umbilical cord
- single midline fold
Medial Umbilical Fold
- Paired folds
Lateral Umbilical Folds
- Paired folds
What is peritoneal Fossae
- Depressions between peritoneal folds and they are sites for herination
What does the Peritoneal fossae include
- Supra-vesical fossa
- Medial inguinal fossa
- Lateral inginal fossa
What is the structure of the flaciform ligament
- Double-layered peritoneal reflection
What is the function of the flaciform ligament
- Connects the liver to the anterior abdominal walls