Where is the perineum located
3D Tour of the Perineum
the pelvis is a complex piece of anatomy
so let's begin by taking a moment to get
our bearings
the perineum lies at the bottom of the
pelvis
it is the space between the thighs
encompassing anus and genitals
space the corners of the diamond are the
coccyx
pubic symphysis
and to ischial tuberosities the ceiling
of the space is the pelvic floor muscles
you
the pelvic floor muscles or liver tore
ni a shapes like a bowl so the ceiling
of the space is partly convex
the sto pubic Remo
the sacred humerus ligament
which are the boundaries of the pelvic
outlet
the diamonds anterior half is known as
the urogenital triangle the posterior
half the anal triangle in a standing
position the urogenital triangle roughly
conforms to the horizontal plane the
anal triangle is on an upward tilt
around 30 degrees from horizontal to
bring some perspective here's the femur
a rough approximation of the coronal
plane
returning now to an inferior view the
year
triangle contains a fibrous sheet called
the perineal membrane oriented like so
you
the perineal membrane has upturned
anterior and posterior edges and
collects within it a space known as the
deep peroneal pouch
the sto anal fussy partially occupy the
space between this pouch and the pelvic
floor muscles the deep peroneal pouch is
thus a very shallow space all of this in
blue is your anal Fosse and the space
contained by and just deep to the
perineal membrane colored in purple
that's the deep peroneal pouch it
contains within it a number of muscles
including the external urethral
sphincter in the female sex the pouch
includes two holes for vagina and
urethra
these are allowed passage through the
lavatory no muscles in this u-shaped
space known as the urogenital hiatus
just deep to the skin is a membranous
layer of superficial fascia known as
collies fascia in between the perennial
membrane and the relevant part of
colleagues fascia lies the superficial
peroneal pouch this pouch contains the
bolbo spongy osis
is he okay venosus
and super visual transverse peroneal
muscles
it also contains various erectile tissue
of the penis and clitoris plus the
continuation of the urethra and vagina
so that's the superficial and deep
peroneal patches
the perineal membrane has a free
posterior border in the center of this
posterior border and of the
diamond-shaped perineum at large lies
the perineal body fibromuscular meeting
point for many structures of the
perineum many of the muscles we've
mentioned so far converge here posterior
and superior to that is the anal
sphincter muscles the centerpiece of the
anal triangle
you
let's go back and review the most
important
points now the perineum is a 3d space
with the pelvic floor muscles as its
ceiling
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the space is divided into the urogenital
triangle anteriorly and anal triangle
posteriorly there are two perennial
patches superficial and deep both in the
urogenital triangle and separated by the
perineal membrane that's it for now
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