So, in this lecture, we are going to look
at the anterolateral abdominal wall.
So, on the screen, we can see we have the torso of
a human which has had the skin removed
to see the musculature and underlying fascial
fibrous tissue that is within the trunk. Specifically,
in this lecture, we are going to look at a series
of muscles that make up this abdominal wall,
look at internal oblique, external oblique,
transversus abdominis, rectus abdominis.
We will also look at their attachments: where
they originate, where they insert and what
function, what movement they carry out and
what important roles they have for the correct
functioning of the abdomen. We will also look
at some aponeurosis which are flattened tendons
of these muscles and we will look at important
structure known as the rectus sheath. Throughout
the lecture, we will look at some important
neurovascular structures, the arteries, the
nerves, the veins of this region. And then,
very briefly, we will introduce the inguinal
regions and specifically, the inguinal canal.
And in the next lecture, we will look at this
in a lot more detail.
So, let's start off with some basics of the
anterolateral abdominal wall.
Here, we can see from anterior to posterior, we can see
that most anteriorly, what you can see when
you take your shirt off is the skin
and we have this anterior layer of skin which we
can see here. And deep to that layer of skin,
we have some subcutaneous, some fatty tissue
which we can see in this layer here which
is immediately deep to the skin.
And then in the more lateral aspect of the abdomen,
so, not where we spoke about the rectus abdominis
muscles in the previous lecture, but more
laterally, we find we have three layers of
muscles which we can see here, 1, 2 and 3.
These are all oblique muscles and our transversus
abdominis muscles. We then find deep again
to... before we get into the viscera of the
abdominal cavity the gastrointestinal tract
which is depicted here, we have a couple of
layers which are within this one line here
called transversalis fascia as an important
layer when we look at the inguinal canal and
then finally, the peritoneum which we will
talk about in detail in subsequent lectures.
So, this is just the basic outline of a section
through the abdominal wall from superficial
to deep. We have got fats, we have got skin,
we have got muscles and we have got important
membranes, before we get into the viscera.