Perineum Flashcards
Perineum is the site for
genitourinary and gastrointestinal tract
2 triangles are important in the perineal region. These are?
Urogenital
Anal
what are the borders of the urogenital and anal triangles?
Pubic Symphysis (ant) Ischial Tuberosity (lat) [coronal line in this plane divides it into the 2 triangles] Coccyx (Post)
from the perineum can levator ani be seen?
No, because the facia covers the Urogenital Diaphragm
the urogenital diaphragm, due to its insertion, creates 2 punches, namely
Superficial Perineal Pouch (between skin and fascia)
Deep Perineal Pouch
In the middle of the base of of the urogenital triangle, there is a condensation of the fascia known as
Perineal Body (anchor for all the structures of the perineum, used to be cut during delivery)
What muscles connect to the perineal body?
Superficial Transverse Perineal Muscles
Deep Transverse Perineal Muscles
The anal triangle is filled with fat on the lateral sides. This fat is contained in a structure known as?
Ischiorectal Fossi
where is located the pudendal canal and what does it contain?
Found on the lower 1/3 against Obturator Internus
contains the internal pudendal vessels, pudendal nerves, and the dorsal nerve of penis/clitoris
the pudendal nerve supplies what structure and what type of supply is it?
Autonomic Supply, superior part of the anal canal (including the internal sphincter)
What are the 3 main divisions of the external sphincter?
Deep (fuses with puborectal sling)
Superficial (fixed)
Subcutaneous
all located around the outside of the structure
to what structures is the superficial division of the external sphincter fixed to?
The Perineal Body and tip of the coccyx
in what pouch are all the sphincters of the urethra located?
in the deep perineal pouch
What are the main subdivisions of the male urethra?
Preprostatic Prostatic Membranous (associated with the external sphincter) Penile
Do females have an internal urethral sphincter?
no, Only males
