00:01
Now let's turn our attention to
the posterior aspect of the thigh.
00:05
And before we do that, let's look
at the thigh in cross section.
00:09
So what we have here is a
cross section through the thigh
and we can see the
subcutaneous tissue
around the edge
surrounded by skin.
00:17
And then running through the
center, we have the femur.
00:20
What we've done here is
we've cut a cross section
through the patient's thigh
and we're looking at it as if we're
standing at the end of their bed.
00:28
So at the top of the screen, we've
got the anterior aspect of the bottom,
we've got the posterior aspect.
00:33
And we've got actually here,
we can see anteriorly
around the femur,
we have the anterior
compartment.
00:39
And in most posteriorly, we'll
have the posterior compartment.
00:42
We also within the thigh region
have an important compartment
which is the medial compartment
or the adductor compartment and
we'll come to that later on.
00:51
What we have to create
these various compartments
are a whole series of
inter muscular septi.
00:56
So here we can see
separating the anterior
from the posterior and
medial compartments
are the lateral
and medial femoral
intermuscular septi.
01:07
We can see those
two running across,
the cross section
of the thigh here
separating the
anterior compartment
from the posterior
and the medial.
01:16
Separating the posterior
from the medial compartments
is the posterior femoral
intermuscular septum.
01:23
So we have these
three compartments
separated by 3 septi.
01:27
And these are invaginations
of that deep fascia
that surrounds the thigh
to help compartmentalize
the muscle.
01:33
It helps to maintain the
organization of the muscles
and help them stay in position
as various forces
are exerted on them
as they contract and relax.
01:43
Within the anterior
compartment of the thigh,
we can see a number of muscles
and these make up what's known
as the extensor compartment.
01:50
The extensor
compartment is obviously
as its name implies,
responsible for extending
the leg at the knee joint.
01:59
We also have the nerve supply
to this extensor compartment,
which is the femoral nerve.
02:05
The posterior compartment
or sometimes known as
the hamstring muscles
are innervated by
the tibial nerve,
and these are responsible
for flexing the knee.
02:14
We then have the
medial compartment
and as I mentioned,
this is sometimes known as
the abductor compartment
integrated via the
obturator nerve,
and these help to adduct the leg
bring the leg into the midline.