Okay, so we've gone through the motor hierarchy, but
we know that using the motor hierarchy alone.
We are not gonna move the way that we actually do move.
We would still be very uncoordinated and
we may not move at all without the basal ganglia.
We need to look at two areas that modulate movement and
the first area that we're gonna look at is the cerebellum.
So here is the cerebellum, you can see it.
It's a little brain that piggybacks on top of the hindbrain,
it's actually derived from the hindbrain.
So here's hindbrain, this part here is
the pons and this is the cerebellum.
And the cerebellum [COUGH] is very interesting
in the sense that it looks like it's a sensory area.
It gets so much sensory input, it gets input from the joints,
from the muscles, from the skin, from deep tissues.
It gets input from the vestibular apparatus and
it gets input from the visual system.
It gets all manner of sensory input and
yet, we're talking about it in the motor section.
Because in point of fact, when we
have damage to the cerebellum, there's a very obvious problem.
And that problem is completely motor in appearance.
And the problem that we get, as you know, with a cerebellar lesion is called ataxia.