But now let’s turn to the pubis or the pubic bone.
This is the antero-lateral part of the hip bone,
and the more anterior part of the acetabulum.
So again, we can draw kind of cross. Here we’ve
got the separation with the ilium above, and then
we come down here, and posteriorly, we find the
ischium. And then anteriorly just here, we have the
pubis. We have the pubic bone. So just coming in
this lower anterior part of the acetabulum, all of
this now becomes the pubis. The body of the pubis
connects the left and right pubic bones at the
pubic symphysis. So if we look to this superior
surface, we can see the body of the pubis here.
And this is going to run along to the other body of
the pubis on the other pubic bone. So these unites
at the pubic symphysis. And the pubic symphysis
will be here. On this superior view, you can see
the body of the pubis will go and it will connect
to the body of the pubis on the other side. We can
see this as well here on this medial surface
passing towards the symphyseal surface where the
pubic symphysis will be located. The pubis has two
rami. It has a superior which passes towards the ilium,
and has an inferior which passes to the ischium
as the ischiopubic ramus. So here, we can see the
superior pubic ramus running in this direction,
and here we can see the inferior pubic ramus running
in this direction. And here, with the help of the
ischium, we can see the formation of the obturator
foramen where we have the superior pubic ramus here,
and we have the inferior pubic ramus here forming
this C part of the obturator foramen. The ischium
will then form this more posterior aspect. If we
look at some bony landmarks on the pubis then
antero-superior border of the pubic body, so here,
we find the pubic crest. And here we find this
pubic crest located just here. Laterally on the
pubic crest we have the pubic tubercle.
And the posterior margin of the superior pubic ramus
is known as the pecten pubis, and that is running
along in this direction. And this is a sharp raised
edge that forms the pelvic brim. So some important
bony landmarks. We have the pubic crest. Apart from
the pubic crest, we have the pubic tubercle.
And then we have the pecten pubis which forms the
pelvic brim. So, a whole series of bony landmarks
on the hip bone. If we now look at the hip bone
itself, then we can see that we have these greater
and lesser sciatic notches, and these are converted
into greater and lesser sciatic foramina
via these two ligaments. The sacrospinous and the
sacrotuberous. So we can see the sacrospinous
is forming this greater sciatic foramen and the
sacrotuberous and the sacrospinous are forming
the lesser sciatic foramen. We also, as I mentioned,
have the obturator foramen. It’s important to bear
in mind the hip in its anatomical position, and that
is it's tilted a lot more anteriorly than people may expect.
This means that the anterior superior iliac spine
and the anterior superior aspect of the pubis
are really in the same coronal plane. It’s tilted a
lot more forwards. This means the internal surface of
the pubis here is facing superiorly, and the pelvic
inlet here is more vertical than it is horizontal.
So the hip bone is actually tilted more forwards.