00:01
So let's have a look at these bones in a little
bit more detail. Let’s start off by looking
at the clavicle. And on the screen we can see
both the superior and then inferior view of
the clavicle. We can see here we have got
a sternal end and this is well articulates
with the sternum. And then we can see we
have got the acromial end over here, here as
well and these form articulation with
the acromion of the scapula. So let’s look
at this in a bit more detail. As I have
said the clavicle connects the sternum
to the scapula. It is important as it keeps
the upper limb away from the trunk. So it
moves the upper limb away from the trunk, again
allowing an increased movement. So there
is less chance for the upper limb to hit the
chest wall. It has been moved away from the
trunk, increasing the movement. We can
see here we have got the superior view
of a right clavicle as if we are looking down
onto it. We can see again this sternal end,
we can see this acromial end. This medial
half has a curve and this lateral half has
a curve as well and it is important in being able
to recognize a left from a right clavicle and
also a superior and inferior surfaces of the
clavicle. So superiorly a clavicle is smooth.
01:33
So here we can see on this superior view,
the smooth shaft of the clavicle. There is
no angulations, there is no grooves which
we'll later see on the inferior view.
01:45
So if you are seeing a smooth surface, you are
looking at the superior surface of the clavicle.
01:51
If you then see one of these curves and along
its anterior surface which is here, it has got
this curve. This curve is convex. So anteriorly
this curve is convex, whereas more laterally
over here, we can see anteriorly the curve
is concave and this is how we can orientate
our clavicles. We find the smooth superior
view and then anteriorly we have a convex
curve and anteriorly here we have a concave
curve. And now see this is going to be the
opposite along this posterior surface. If
we then move towards the inferior surface,
this is if we're standing underneath the clavicle
and we are looking up. We can see that its
roughened. There is a whole series of tubercles
or features, which are important for articulation
with ligaments. And here we can name a few of them.
We have what's known as the conoid tubercle.
02:53
We have got this tubercle here. This is by the
acromial end and we have got a conoid tubercle.
03:00
This is part of the coracoclavicular
ligaments which we will talk about in more
detail later on, an important stabilizing
ligament of the shoulder.
03:10
And we also have connecting really the conoid
tubercle to this acromial end, the trapezoid
line. We can see the trapezoid line, this line
the roughened area here. And that is also
important because that's where the trapezoid
ligament attaches and this again is part
of the coracoclavicular ligament. And this is
important again and helping to stabilize the
shoulder joint. We can see we have an impression
for the costoclavicular
ligament, we can see that here. This is by
the sternal end of the clavicle and as its
name suggests, the costoclavicular ligament
is going to attach to the ribs and this is
important in the sternoclavicular joint, which
we'll look at again later on in this series.
04:02
We also have a subclavian groove and we can see
a subclavian groove here and this is important
for attachment of subclavius muscle, a small
muscle that runs on the underside of the clavicle
and we'll cover that when we look at the musculature.
Another feature on this inferior view of the
clavicle is this nutrient foramen and that
is where the nutrient artery passes into the
clavicle to give it its blood supply. So
here we have an overview on this slide
of the clavicle. This is a right clavicle
in this diagram. We have the smooth superior
surface which is convex anteriorly for the
medial half and concave anteriorly for the
lateral half. The inferior view has a number
of features. It’s roughened. It got the
conoid tubercle, the trapezoid line, the costoclavicular
ligament impression and also a groove for
subclavius. If we now move on to the
scapula. The scapula