Anatomy Lecture 21_Inguinal Canal Flashcards
How do layers in the sub inguinal region compare with layers in the abdominal region?
See attached
What forms the superficial inguinal ring?
It is formed by the aponurosis of the external obliques where it forms the ingunal ligament
What forms the deep inguinal ring?
It is formed by the endoabdominal facia
What forms the cremaster muscle. What nerve innervates it?
The cremaster muscle is formed from fibers of the Internal oblique. It is innervated by the genital branch of genitofemoral nerve
What forms Dartos Muscle? What innervates it?
Membranouse (Scarpa’s) Facia. It is innervated by sympathetics running with ilioinguinal and posterior
scrotal nerves
Where do the testicular arteries originate?
They come off the aorta
Where do the testicular veins arise?
- Left from left renal vein
- Right from Inferior vena cava
Where do the cremaster vessels arise?
From the inferior epigastric vessles
What is the Tunica Vaginalis
It is a serus producing layer with a viseral and parietal peritinium
What is a Gubernaculum
During development, it is a ligament type structure that connects the developing gonads to the skin. It provides the path that the gonads will follow as they decend from up by the kidneys to their final location in the scrotum (for men)
How is the space for the decending testie created
The parietal peritoneum pushes out a fingerlike projection into the other tissues. This creates the tissue layers of the scrotum and provides a space for the testie as it travles down the gubernaculum
What are the 5 things that can contribute to sub inguinal herrnias
- Erect posture
- Increased intra-abdominal pressure
- Persistence of processus vaginalis
- Muscular deficiency
- Tissue abnormality
Where do Direct Inguinal hernias occure? What causes them
The occure in the medial inguinal fossa
(Hesselbach’s triangle). They result from the fact that below the arcuate line, the posterior rectus sheath is only composed of the perital peritinium and the transversalis facia.
What are the boarders of the medial inguinal fossa
(Hesselbach’s triangle)
The rectus abdominas, the inginal canal, and the inferior epigastric vaculature
What is an Indirect Inguinal hernia
it is a hernia that passes through a
persistent processus vaginalis
