Stuart
Hameroff, et.al.; Science of Consciousness I |
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Chalmers;
Problem of Consciousness |
5 |
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Consciousness
is the most baffling problem in the science of the mind.
There is nothing that we know more intimately
than conscious experience, yet there is nothing that is harder to
explain. |
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Chalmers;
Problem of Consciousness |
6 |
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The really hard
problem of consciousness is the problem of experience. |
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1 |
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Chalmers;
Problem of Consciousness |
7 |
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Sometimes terms such as
"phenomenal consciousness" and "qualia" are used, but I find it more natural to speak of "conscious experience" or
simply "experience." |
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1 |
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Koch; Neuronal Substrate of Visual Consciousness |
248 |
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To be aware of an object or an event, the brain has
to construct an explicit, multilevel, symbolic interpretation of part of a visual scene. |
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241 |
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Koch; Neuronal Substrate of Visual Consciousness |
248 |
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By symbolic, as applied to a neuron, we mean that a neuron's firing is strongly correlated with some feature of the visual world and
thus symbolizes it. |
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0 |
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Koch; Neuronal Substrate of Visual Consciousness |
248 |
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Whether a neural
symbol is best thought of as a scalar (one neuron) or a vector (a group of closely associated
neurons as in population
coding in the superior
colliculus) is a difficult question. |
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0 |
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Koch; Neuronal Substrate of Visual Consciousness |
248 |
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Awareness
results from the firing of
a coordinated subset of cortical (and possible thalamic) neurons
that fire in some special manner for a certain length of time, probably for at least 100 or 200 ms. |
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Koch; Neuronal Substrate of Visual Consciousness |
248 |
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Neuronal firing for awareness
needs to activate some type of short-term memory by either strengthening
certain synapses or maintaining an elevated firing rate or both. |
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0 |
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Koch; Neuronal Substrate of Visual Consciousness |
249 |
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Assuming that the semiglobal activity that corresponds to awareness has to last for some minimum time (of the order
of 100 ms) and that events
within that time window are
treated by the brain as approximately simultaneous. |
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1 |
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Koch; Neuronal Substrate of Visual Consciousness |
249 |
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Unless a neuron has an elevated firing rate and unless it fires as a member of an
(usually temporary) assembly, it's firing will not
directly symbolize some feature of awareness. |
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Koch; Neuronal Substrate of Visual Consciousness |
249 |
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Both physiological and
psychophysical studies have shown that movement is extracted early in the visual system as a primitive. |
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Koch; Neuronal Substrate of Visual Consciousness |
249 |
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"Kanizsa triangle"
illusion, in which three Pacmen are situated at the corners of a
triangle, with their open mouths facing each
other. Human observers see a white triangle even though the intensity
is constant between the Pacmen. |
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0 |
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Koch; Neuronal Substrate of Visual Consciousness |
252 |
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Primary visual cortex at its connections. |
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3 |
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Koch; Neuronal Substrate of Visual Consciousness |
252 |
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It is unlikely that information sent along the pathway from V1 to the superior colliculus, responsible for controlling and initiating eye movements, can produce visual awareness. |
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Koch; Neuronal Substrate of Visual Consciousness |
253 |
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Hypothesizing that the activity in V1 does not directly enter awareness. |
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1 |
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Koch; Neuronal Substrate of Visual Consciousness |
253 |
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What does enter
awareness is some form of neural
activity in certain higher visual areas, since they do project directly to
frontal areas. |
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Koch; Neuronal Substrate of Visual Consciousness |
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Koch; Neuronal Substrate of Visual Consciousness |
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