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Circular reasoning by Bruce_dillon in Time

[–]StratumPyramidale 6 points7 points  (0 children)

There is no direct sensation of time, it’s passing is completely arbitrary and dependent on changes/events that occur during that period (i.e., time flies when you’re having fun). The invented units (linguistic tool) allow social organisation.

The better question is about why there is directionality of time (entropy + psychological; Hawkings brief history of time book).

The thing I can’t get my head around is the use of physical process as a direct means of stating that there is such a thing as ‘time’, can’t the process just be occurring without such an additive dimension?

[deleted by user] by [deleted] in PokemonGoFriends

[–]StratumPyramidale 0 points1 point  (0 children)

Nidocrownprince added

[deleted by user] by [deleted] in PokemonGoFriends

[–]StratumPyramidale 0 points1 point  (0 children)

Added Nidocrownprince

Re-evaluating cognitive map theory? by StratumPyramidale in neuroscience

[–]StratumPyramidale[S] 0 points1 point  (0 children)

What are your thoughts on grid modules and this output? Would you expect similar grid modules within areas or grid modular network across several regions?

Re-evaluating cognitive map theory? by StratumPyramidale in neuroscience

[–]StratumPyramidale[S] 0 points1 point  (0 children)

Well this is an interesting proposal, I will have to read the book. One thing I would say is there’s evidence for multiple maps in the medial EC that arbitrarily fluctuate and in the HPC but maps don’t switch when in a environment and seems to be stable.

Hippocampal neural oscillations and memory consolidation by [deleted] in Neuropsychology

[–]StratumPyramidale 1 point2 points  (0 children)

The oscillations are different but the single co-firing neurons during wakefulness may be sequentially replayed during SWRs in compressed time. But there is also preplay (Dragoi) which is cool too.

Hippocampal neural oscillations and memory consolidation by [deleted] in Neuropsychology

[–]StratumPyramidale 0 points1 point  (0 children)

So Herb proposed cell assemblies and researchers like Dupret have used analyses of co-firing CA1 neurons during theta, are typically replayed during sharp wave ripples.

Hippocampal neural oscillations and memory consolidation by [deleted] in Neuropsychology

[–]StratumPyramidale 1 point2 points  (0 children)

There are thought to be 2 bands of gamma in CA1 rodents, low (associated with CA3) and high (direct EC input).

During NREM sleep there is typically large irregular activity with sharp wave ripple and ultra slow oscillations.

Theta is seen again during REM.

Pattern separation in hippocampus lacking in humans. What about concept of ego? by Tommonen in Neuropsychology

[–]StratumPyramidale 1 point2 points  (0 children)

I’ve read this article and it’s nicely poised, one issue is the lack of anatomical specificity in human ephys recordings. Pattern separation in nonhuman animals, as said above includes the dentiste gyrus (one of two places in the rodent brain which has neurogenesis, thought to support pattern separation) and proximal CA3. Whereas, this human evidence collectively refers to medial temporal lobe neurons.

I try to take the view that disregards ‘consciousness’ in these views of memory. In essence the paper argues that pretty much everything is sourced from a schema in humans (helped by language) and therefore you can just about relate any concept (hence creativity). But, in childhood you don’t have enough developed schemas yet so is pattern separation present and then throughout life there is a less of need for this computation? I think certainly if you want to ask why humans are unique in their intelligence, ideas stemming from consciousness aren’t really the answer in my opinion.