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Jun
8
comment Is there any limitation in our ability to come up with a theory or hypothesis to understand brain?
try explaining what you are asking better, because this question is very hard to understand.
Jun
3
comment Conditioning and Contingency
would you mind upvoting/accepting my answer?
May
15
comment Are the center surround receptive fields learnt or inherited?
However, these observations of vision-dependent dendritic plasticity in the retina underscore the need to consider the developmental effects of sensory stimulation at all levels of the visual pathway and raise the possibility that some physiological changes in the cortex may be due to alterations of retinal circuitry.
May
15
comment Are the center surround receptive fields learnt or inherited?
Visual stimulation therefore acts in various ways to shape the dendritic organization and light responses of the retinal ganglion cells. It is not yet apparent why maturing retinal circuits should be fine tuned by visual stimulation, but this plasticity may represent a strategy by which the animal can adapt to novel visual environments if the need arises.
May
15
comment Are the center surround receptive fields learnt or inherited?
The effect of visual deprivation was attributed to the maintenance of a greater proportion of bistratified cells in the mouse retina. Because retinal ganglion cell numbers are largely unchanged after eye opening, the increased bistratified cell population is thought to arise from a failure to eliminate dendrites in the ON or OFF synaptic sublamina. The anatomical perturbation by light deprivation is supported by physiological recordings showing a similar increase in the incidence of ON-OFF retinal ganglion cells in dark-reared animals.
May
15
comment Are the center surround receptive fields learnt or inherited?
Surprisingly, visual deprivation also induces significant changes in dendritic branching patterns in the retina. In the turtle retina, dark rearing results in an expanded dendritic territory in retinal ganglion cells (Sernagor and Grzywacz, 1996). Recently, visual deprivation in mice showed that there are more bistratified retinal ganglion cells in dark-reared compared to light-reared animals (Tian and Copenhagen, 2003). Bistratified cells respond to both an onset (ON) and offset (OFF) of light, in contrast to monostratified cells that are either ON or OFF responsive (Wässle, 2004).
May
15
comment Are the center surround receptive fields learnt or inherited?
how about this article sciencedirect.com/science/article/pii/S0896627305008779
May
15
comment Are the center surround receptive fields learnt or inherited?
my bad. i was mostly trying to point in the right direction of search terms. "plasticity" instead of "learning"
May
15
comment How is brain processing different for situation-less vs. situated emotional faces?
it is unlikely to find an answer to such a specific question. you'd have more luck looking into the brain level of analysis for the broader question of context-dependent visual processing.
May
15
comment Do the colour blind have a distinct visual cortex structure?
bevil conway has interesting theories on v4 function in color perception academics.wellesley.edu/Neuroscience/Faculty_page/Conway/…. In particular, he says that color perception is primarily for object recognition (stop signs are red, yield signs are yellow) and for emotional valence.
May
15
comment What explains variability in the mean firing rate across biological neurons?
Each neuron is performing a different computational role in the network, so you would expect some to have different firing rates from others.
May
15
comment Cosyne vs CNS conferences for Computational Neuroscience?
There is also a stereotype of CNS being more biophysical and Cosyne being more systems-oriented. (I have never been to CNS)
May
15
comment What research has been done on brain-to-brain interfaces?
nature.com/srep/2013/130228/srep01319/full/srep01319.html shows brain to brain interface in rats
May
15
comment How many action potentials from presynaptic neurons would be required to make a postsynaptic neuron fire?
figure 2c is pretty great for that
May
15
comment Does an action potential abolish an excitatory postsynaptic potential?
you all spend way too much effort policing what is and is not acceptable questions
Jun
24
comment Can the neuronal firing rate be increased through medication/diet?
Why would you want to increase neuronal firing rate? That wouldn't necessarily lead to an increase in processing capacity.
Jun
2
comment Is there any evolutionary theory for self-destructive behavior?
why should every single phenomenon be evolutionarily adaptive? evolution isn't perfect.
Jun
2
comment Where do our memories get stored and how are they retrieved again?
needs more specific framing. what kind of memory? different forms of memory are almost certainly stored and retrieved in different ways.
May
27
comment Are there any recorded cases of hearing the outside world while in a coma?
Monti, M.M., et al (2010). Willful modulation of brain activity in disorders of consciousness. The New England Journal of Medicine, 362(7), 579-589. google.com/url?url=http://scholar.google.com/…
May
8
comment How fast is the visual system?
isn't a peak of activity the same as the time of the potential?