Abdominal muscular wall and peritoneum Flashcards
External oblique OIAN
O: lower 6-8 ribs
I: Iliac crest, linea alba via aponeurosis
A: contralateral trunk rotation
N: T7-T12 intercostal nerves
Where does the linea alba run?
Between xiphoid process and pubic symphysis
The inguinal ligament is the thickened part of the _________ oblique aponeurosis.
external
Do the muscular fibers of the external oblique ever reach the midline?
NO; just via the aponeurosis
Internal oblique OIAN
O: iliac crest, inguinal ligament
I: lower 6 ribs, insert to linea aspera via aponeurosis
A: ispilateral trunk rotation
N: T7-T12 intercostal nerves
The right external oblique and left internal oblique would be (antagonists/agonists)?
AGONISTS
Transversus abdominus OIAN
O: iliac crest, lower 6 ribs and thoracolumbar fascia
I: linea alba via aponeurosis
A: increases abdominal pressure
N: T7-T12 intercostals
Can transverse abdominus rotate the trunk?
NO; horizontal fiber orientation
Along with the diaphragm, the transverse abdominus assists in performing the ________ maneuver, which is not appropriate for what type of population?
valsalva; individuals with any heart issues
Rectus abdominus OIAN
O: pubic bone I: costal cartilages 5,6,7, sometimes xiphoid process A: trunk flexion; ROI: posterior pelvic tilt N: T7-T12 intercostal nerves
The rectus abdominus is divided by tendinous _________.
intersections
What does the inguinal canal contain in females? in males?
F: round ligament of uterus, ilioinguinal nerve, vessels
M: vas deferens, ilioinguinal nerve, vessels
What is the entrance of the inguinal canal?
deep inguinal ring
What is the exit of the inguinal canal?
superficial inguinal ring
Approximately how long is the inguinal canal?
45 cm
From what three structures do the extensions surrounding the tests come from?
- transversalis fascia
- internal oblique
- external oblique
From what layer do the muscles surrounding the testes come from, and what is the name given to this muscle?
2nd layer (internal oblique); cremaster muscle
What are the two phases of testicular descent?
- Trans-abdominal phase
2. Trans-inguinal phase
When does the trans-abdominal phase occur?
10-15 weeks gestation
When does the trans-inguinal phase occur?
25-35 weeks gestation
The ________ is a large serous membrane lining the abdominal cavity.
peritoneum
What are the two layers of the peritoneum?
- parietal
2. visceral
The peritoneum consists of a n epithelial like single layer of cells, called the ________, tougher with a supportive layer of connective tissue.
mesothelium
What cells secrete the serous fluid that lubricate the abdominal surface, allowing free movements of the viscera?
mesothelium
