00:01
In this topic,
we're going to look at the
perineum and external genitalia.
00:07
So before we move into
the specific details
of the structures and
boundaries of the perineum,
let's first of all start by
introducing it as a space.
00:16
So as we can see here on the slide,
we're looking into
the right hemipelvis.
00:22
Anteriorly, we've got the
right hand side of the screen
and then on the left hand
side, we've got the sacrum
and gluteal region
on the posterior aspect.
00:30
And what we can see here
is the pelvic diaphragm,
which is really forming the inferior
boundary of the pelvic cavity.
00:38
Remember, the pelvic
diaphragm is formed by those
muscles, levator ani, and coccygeus.
00:43
A space that lies inferior
or really superficial
because it is technically closer
to the surface of the skin
is a very slim space
called the perineum.
00:55
And the perineum contains
lots of important structures
around external genitalia,
and also the anus, anal canal,
and the urethra.
01:03
So, we'll look at these space
in more detail.
01:06
So, let's carry on orientating
ourselves with the perineum
and where it is within the pelvis.
01:12
So, here we can see a view looking
at the inferior aspects
of the pelvis.
01:18
This pubic symphysis is anteriorly
at the top of the screen,
and the sacrum and coccyx
is posteriorly
at the bottom of the screen.
01:26
So, here we can see
within the perineum,
which we're going to describe,
it has a number of openings,
the urethral opening and the vaginal
opening and the anal aperture.
01:37
And these allow structures to
pass from the pelvic cavity,
through the perineum
into the outside world.
01:44
So, let's describe this space.
01:45
Let's look at its boundaries, and
importantly, the perineal membrane.