In this lecture, we’re going to look at the
blood supply to the upper limb. So really,
it’s going to be an overview of the blood
supply. We’ll look at the blood supply to
the axilla, the arm, the forearm, and the
hand. We’ll look at the axillary artery,
its three divisions, and the various branches.
We’ll look at the brachial artery and
its branches. We’ll look at the ulnar and radial
arteries, the branches that come off this.
And also the anastomosis they formed around
the elbow. We’ll then look at the blood
supply to the hand and the superficial and
deep palmar arches, how they’re formed from
the radial and ulnar arteries, and how they
give rise to blood vessels that supply the
digits. So here, we can see we have a nice
overview of the blood supply to the upper
limb in this diagram. It is a right upper limb
and we’re looking at the anterior surface.
We can see that each upper limb is supplied
with arterial blood that is coming primarily
from either the left or the right subclavian
artery. So here we can see above the clavicle,
we have the subclavian artery. And on the left-hand
side, this is a direct branch of the aortic
arch, and on the right side, it’s the bifurcation
of the brachiocephalic trunk. The principle
artery or arteries of the axilla are going
to be axillary artery which we can see here.
The axillary artery as we know is the direct
continuation of the subclavian artery.
And then it passes down into the arm as the brachial
artery. And then this divides in the forearm
to the radial and ulnar arteries. And then when
we pass into the hand, we can see we have
these deep and superficial palmar arteries.
So, all of these blood vessels are originating
from the subclavian artery. It passes down
into the axillary artery which then becomes
the brachial artery. The brachial artery then
bifurcates into radial and ulnar arteries,
and here, we have those superficial and deep
palmar arteries. So we can look at the details
of all of these blood vessels.