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Neuronerd.


Oct
6
comment What's the evolutionary reason behind decussation?
Related: biology.stackexchange.com/questions/3807/…
Sep
28
reviewed Leave Closed Do biological facts determine when a human fetus is considered alive and human?
Sep
26
comment How were the synaptic areas identified in the somatic sensation pathways?
Check out the work of Denny-Brown in humans. I suspect this work that you describe was done much earlier, but you may be able to follow some of the references backwards from him.
Sep
25
comment Why do different pain killers have different effects on people?
Related: biology.stackexchange.com/questions/2922/…
Sep
23
comment Evolutionary motivation behind number of neurons in DCMMP
The species you want to look at for this are giraffes and, to some extent, elephants. This article is talking about information flow in the other direction (corticospinal tract) but it might have some insights into the sensory pathways. I did not read it yet, though.
Sep
21
reviewed Close Vitamins that could help “make us smarter”?
Sep
21
reviewed No Action Needed Identification of an Insect (Hemiptera)
Sep
21
reviewed No Action Needed Organism identification, what is this?
Sep
20
comment How the conjunctivitis virus spread just by seeing a person's eye who is infected
The sunglasses are worn because eyes that are infected are more sensitive to light. It has nothing to do with infecting other people, and has absolutely nothing to do with someone catching the infection while looking at the eye.
Sep
17
reviewed Leave Closed What is MHC haplotype?
Sep
15
comment Could this Francobelgian comic book woman really have these 4 diseases at the same time?
This is fine for the site. The disease process is definitely a part of the biology. We're more concerned about people asking for personal treatment advice than anything.
Sep
7
comment How does core-conductor model correspond to an actual neuron?
The core conductor model is very limited in scope. It may be helpful for you to take a look at Hodgkin and Huxley's work with the compartmental models as a way of exploring the limitations of cable theory.
Sep
7
comment How does core-conductor model correspond to an actual neuron?
and the potassium efflux. There are different subtypes of these potassium channels as well (so Rm take a lot of information about conductances/resistances and jams it down into one component). My "grounds" in my circuit are a bit exaggerated, since the currents leaving and entering the axon can propagate through the ions in the extracellular milieu. I just wanted to illustrate that the conductances could be split off into the different components, but it was still justifiable to combine them.
Sep
7
comment How does core-conductor model correspond to an actual neuron?
@IllegalImmigrant The breaks (nodes of Ranvier) on the myelin sheath are modeled by the electrical nodes between the horizontal resistors in your model. These are the only places between the hillock of the axon (the pointy part at the end of the cell body) and the terminal where ions are being exchanged. At the other points along the axon, the receptors are covered over by the myelin, so no current leaks out with the movement of the ions. The vertical resistors are realistic, they just betray the complexity of the actual voltage-gated influx through sodium channels
Sep
7
reviewed Reviewed Why do we weigh less in the morning?
Sep
7
revised How does core-conductor model correspond to an actual neuron?
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Sep
7
revised How does core-conductor model correspond to an actual neuron?
added 281 characters in body
Sep
7
revised How does core-conductor model correspond to an actual neuron?
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Sep
7
comment How does core-conductor model correspond to an actual neuron?
That's probably clear as mud, and I've glossed over a lot, so feel free to ask questions and I'll fill in the gaps.
Sep
7
revised How does core-conductor model correspond to an actual neuron?
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