Actually, I remember reading something about scientists finding a list
structure in the brain of a bird singing a song (a moving pointer to the
next item in a list sort of thing). But whatever.
It's not a very low level model, but the lower level activation is implied.
When you imagine a goal-state, the relationship is represented in the
brain somehow (in the neurons of course). And when evidence of the
actualization of that goal-state comes in through the senses, the brains
sends an opiate reward, which might make the person want to do whatever
that was again in the correct context.
Motivation circuits - familiar with the concept?
If a motivation circuit gets over-energized then a person gets locked
into doing the same thing over and over again (and not getting the
goal-state), rather than having enough resources left to think about
doing something different and what that different thing should be. Does
someone need to know exactly how a motivation circuit becomes
over-energized at the neuronal level in order to model it in an AI? I
don't think so.
Many things like this are known. And people don't need to understand
such at the individual-neuron level to model what happens.
Bryan Bishop wrote:
On Sunday 14 September 2008, Dimitry Volfson wrote:
Well, then I don't understand what you're looking for.
Brain chemistry is part of the model.
Check out one of the sentences:
"The thalamus in the limbic system ('leopard brain') converts the
physical need into an urge within the cortex."
So if I shoot a "physical need" at a thalamus sitting in my lab, it'll
pop out an "urge" ? You're just talking about the output of the
neurons, not the concept of "urge" that most people talk about from
Webster's etc -- which is of the mind, not the brain. I'm not saying
that the mind is separate from the brain, I'm just saying that people
are confused and probably wrong when they talk about the mind. They
most often are .. having no background in neuroscience, etc.
If you look on the page, you see some "implementation details" like -
Wants and needs have to struggle against one another in a priority
list for action now or later or not at all. The strength of the urge
is thus important, with strong urges leading to needs that jump the
queue, demanding immediate action.
I'm a programmer, I know what a list and queue look like, show it to me.
Nobody has yet shown neurons doing math, much less a "list" object.
- Bryan
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