And you will call this cell basket, because it generate basket, like a basket
connection through the axon, in this case.
Or in this case, they use the[INAUDIBLE] structure that is en-, en-, engulfing the
post-synaptic cell like this, like baskets.
The horse tail. This is this is another, another cell
type and so forth, the Martinotti, so you can see that you can start to make some
order. It's not a complete jungle in the sense
of types, for some reason that is not completely clear, absolutely not yet, why
do we have the different types? Why don't we have just one inhibitory
type, one excitatory type, and finish with it.
Why do we need all these little characters?
Each one with different shapes. Each one makes contacts to different
direction, and with different post-synaptic cells.
It's not a jungle. It's an orderly system that is doing
function. Speaking, talking, feeling.
So these are the basic elements in the inhibitory system.
We can do the same for the excitatory group of cells.
One is called pyramidal cell layer five. Another one is called[INAUDIBLE] layer
four. So I'm not going to elaborate on that.
So this is more for logical characterization.
Or classification. Using morphology as a parameter for
classification. But I can also use as I said before,
electrical based classification, so based on this spiking part of the neurons.
So for example, if you record from one neuron.
The spikes of one neuron, you see that one neuron is doing[SOUND] very
intensely. If you recall from another neuron it, it,
it fires spikes but in a sparse kind of way.
We call it stutterer because it stutters,[SOUND] a stutterer.
Another stutterer. So, there are different types based on
the electrical activity. And each one of these cells has
electrical character. This type of cell wants to do[SOUND] and
then accommodates slower and slower. So, very fast at the beginning, and then
slower here. This is a regular firer.
It fires very regularly. Fires spike after spike with very regular
intervals. So we'll call it a regular firer and so
on. And so, so this characterization which is
independent of the morphology ju-, the morphological character, is just based on
how you speak electrically. I like to speak very strongly fast.
I like to speak more regularly. I'm a solid, i'm a solid person.
This one starts very fast and then becomes tire a little bit and then it
finds less. This one is completely started it doesn't
succeed to speak continuously so it spies like this .
And there's must be some functional meaning to all that.
Which again we don't completely understand.
But it's important to see that inside this spiking mechanisms which again, we
should speak a lot about this spiking mechanism of cells there are different
types of spiking mechanism. This 1, this 1 and this 1.
So it can categorize the cells as they did here through this blue brain data
base. We can see different types of sales.