Posterior Abdominal Wall Flashcards
Thwart are the walks of the abdominal period”v8c cavity?
The abdominal and pelvic cavities are continuous
Upper boundary- thoraco-abdominal diaphragm
Lower boundary- pelvic diaphragm
Pelvic inlet- the division between the abdominal and pelvic cavities
Parietal peritoneum- Lines the abdominal wall and the pelvic organs serving as an additional separation
What is the diaphragm?
Muscular and tendinous separation between the thorax and abdomen
-Lined with peritoneum (inferiorly), except for the area superior to the bare area of the liver
Diaphragm as a muscle changes size of the thoracic cavity to facilitate airflow of the lungs during breathing
What are the three large openings of the diaphragm ?
Inferior vena cava T8 vertebral level
Esophagus T10 vertebra level
Aorta T12 vertebral level
What is the blood supply of the diaphragm?
- superior and inferior phrenic arteries
- musculophrenic arteries
- pericardioohrenic arteries
What is the innervation of the diaphragm?
Phrenic nerves (C3,4,5)
Where does the inferior vena cava enter the diaphragm?
Caval hiatus(T8)
Where does the esophagus enter the diaphragm?
Esophageal hiatus (T10)
Along with esophagus, anterior and posterior vagal trunks
What enters the diaphragm: through the median articulate ligament?
At T12
Aorta and thoracic duct
What is the function of the psoas major?
Action: flexes hip
What is the innervation of the psoas major?
Innervated by ventral rami of L1-3
O/I vertebral bodies & transverse processes T12-L5 to lesser trochanter
What is the function of the Quadratus lumborum?
Depresses & stabilizes rib 12, lateral bending (lateral flexion)
What is the innervation of the Quadratus lumborum?
Innervated by ventral rami of T12-L4
O/I transverse process of L5, iliac crest and iliolumbar ligament to transverse processes of L1-4 and rib 12
What is the action of the iliac?
Action: flexion of hip
What is the innervation of the iliacus?
Innervated by femoral nerve
O/I iliac fossa and upper portion of lateral sacrum to lesser trochanter
What is the location and function of the lumbar plexus?
The nerve supply of the posterior abdominal wall, pelvic walls and floor and lower limb are closely related
The lumbar plexus serves the abdomen, anterior and medial thigh
The sacral plexus receives a contribution from the lumbar plexus- lumbosacral trunk
-The sacral plexus supplies the pelvic muscles, gluteal region and posterior lower limb
What nerves are applied to the lumbar plexus?
Iliohypogastric nerve
Ilioinguinal
Genitofemoral
Lateral femoral cutaneous
Femoral
Obturator