00:01
Now, let's turn our attention to the brachial artery.
00:05
So, the brachial artery is that continuation
of the axillary artery as it leaves the axilla.
00:10
It runs just underneath the cleft of
biceps brachii and brachialis.
00:15
And it's an important location for
measuring blood pressure.
00:18
So, here, we can see the axillary
artery and biceps brachii there.
00:22
As we go to the lower border of teres major, the axillary artery
becomes the brachial artery which we can see here.
00:29
Here, we could see triceps brachii as well
to ensure that relationship still exists.
00:34
And then, we can see the brachial artery runs
all the way down between this musculature deep
within the arm and passing towards the cubital fossa where
it will give rise to the radial and the ulnar arteries.
00:48
Here, we can see the brachialis muscle
has just been added to the diagram
to help see the relationship of these muscles
to this important blood vessel, the brachial artery.
00:58
It enters into the cubital fossa by that imaginary
horizontal line between the two epicondyles,
the lateral and medial
epicondyles of the humerus.
01:07
And here, it then divides
into the radial and the ulnar arteries.
01:10
So, the brachial artery bifurcating into
its two terminal branches that go on
to supply the forearm and the hand
within the cubital fossa.
01:20
There are a number of branches
which come off the brachial artery
and these all help to supply joints around the
elbow, so, the elbow joints specifically
and also, the joints that are associated
to pronation and supination.
01:32
And here, we have the superior ulnar collateral
artery that helps to supply the joint capsule.
01:37
And we have a superior version.
We're also going to have an inferior version.
01:41
And these are just coming off at different
proximities to each other,
hence, the superior and inferior
ulnar collateral artery.
01:49
Ulnar because they're passing down onto
the medial aspect towards the ulnar side.
01:55
Coming off the brachial artery quite high up, quite
proximally, passing through the triangular interval
that we've mentioned before, we have
the profunda brachii. This is a deep brachial artery.
02:06
It runs alongside the radial nerve and that runs down the
radial groove on the posterior surface of the humerus.
02:14
So, here, we can see the triangular interval
formed by the longhead of triceps,
teres major, and the
shaft of the humerus.
02:21
We can see this blood vessel then as
indicated here, running along the radial groove.
02:26
Remember, the radial groove separates
the medial and lateral heads of triceps.
02:31
The deep brachial artery also gives rise
to the radial collateral artery.
02:35
And that goes on to supply deep structures
and also, structures around the elbow joint itself.