So if we?re going to look at these thigh muscles,
then posterior to the femur within the thigh,
we find these hamstrings, semitendinosus,
semimembranosus and biceps femoris, especially
the long head, because the short head doesn?t
cross the hip joint, it?s not classically
termed as a hamstring. We can see these large
fleshy muscles, semitendinosus here with its
long tendon and the long head of biceps. In
this small radical dissection, we can now
see semimembranosus and we can see the long
head of biceps has been reflected here to
reveal the short head. So we can see we have
some big bulky muscles in the posterior thigh.
They originate from the ischial tuberosity,
the hamstrings, and they insert on to the
tibia and the fibula. So they cross two joints,
the hip and the knee. The short head is not
a hamstring as it only crosses the knee joint,
and it also has a different innervation.
Remember it?s the common fibula. Blood supply to
the hamstrings we?ll look at in more detail
in a later lecture, but we did just comment
on it previously via perforating branches.
And these originate from the profunda femoris.
This is a branch of the femoral artery, which
we?ll look at in more detail in a later lecture.
And these perforating branches, they
pierce adductor magnus. We can see adductor
magnus here. This adductor magnus is pierced
by these perforating branches to enter the
posterior compartment. But we will cover this
in the later lecture. Now let?s turn to
the popliteal fossa. This is the important