blood supply if the popliteal artery was to
become compromised in some way. Now let’s
move on to the posterior leg supplied by these
tibial arteries; the popliteal artery bifurcating
into anterior and posterior tibial arteries.
We can see our most superficial dissection
here where we see the popliteal artery is
really continuing as the posterior tibial
artery, running alongside the tibial nerve,
which we can see here, and it’s running
deep to soleus. So, reflecting soleus reveals
this neurovascular bundle. Passing anteriorly,
we see the anterior tibial artery would pass
through the superior interosseous aperture
of the interosseous membrane, the superior
aperture of the interosseous membrane.
But here, we can also see the posterior tibial
artery is giving rise to the fibular artery,
and that goes to supply the fibular muscles within
the lateral compartment. So the posterior
tibial artery formed at the inferior border
of popliteus at the bifurcation of the popliteal
artery. It passes deep to the tendinous arch
of soleus and provides arterial blood to the
posterior compartment of the leg and sole.
We can see it running down here, giving rise
to numerous muscular branches that will supply
the posterior compartment. Deep to soleus,
it gives rise to the fibular artery. We can
see the fibular artery here. And this runs
distally towards the fibular, the lateral compartment.
So we can see this is then progressing
laterally over and supplying the lateral compartment,
supplying fibularis longus and fibularis brevis.
The posterior tibial artery then runs distally
and it runs posterior to tibialis posterior
towards the medial malleolus. So here we can
see it running towards the medial malleolus.
It enters the sole of the foot by passing
posterior to the medial malleolus deep to
the flexor retinaculum alongside the tibial
nerve. And here, it will then divide into
lateral and medial plantar arteries. If we
look at the fibular artery now, it comes from
the posterior tibial artery and it passes
laterally, as I was saying, to the fibula.
It supplies both the lateral and it also gives
them branches to the posterior compartment.
It gives off perforating branch. It gives
off a perforating branch that penetrates the
inferior aperture of the interosseous membrane,
and this will then anastomos with the anterior
tibial to enter the dorsum of the foot. We can
see that here. Now, we look at the anterior leg.