4,326 reputation
1226
bio website keegan.aws.af.cm/index.html
location Ontario
age
visits member for 2 years, 7 months
seen 3 hours ago

BS Physics (received)

MS Computational Neuroscience (received)

PhD Theoretical Neuroscience (attending/pursuing)

Published Paper: Transient spatiotemporal chaos in the Morris-Lecar neuronal network

Psychedelic improv band: Luop Garou


Nov
28
comment how is tone volume encoded?
Audio signals are encoded (in part) by hair cells and the hair cells have a tethered lever under tension. One of the ways desensitization occurs is via adjustments to the tension of the lever.
Nov
2
comment Is being “hyper”-offended, no matter the cause, an indicator that someone might be a socio-/psychopath?
It sounds more like indignation than a mental disorder. It's something everybody is capable of when they feel they are in the right and someone else is in the wrong.
Oct
15
comment What's the functional difference between the NEF and normal ANNs?
When I see ANN I think of individual neurons modeled for simplicity and problem solving, not physiology (so not ion current models based on actual channel kinetics). Usually the goal is to compute something, not understand neurons - I think that the core definition of ANN is in the goal of the network design, not the type of neurons used. The two I mostly see in such approaches are integrate-and-fire and firing rate models. Though I'm no authority here, my research in ion-conductance models. I know sometimes you can deduce group neuron behavior using ANN's, so there's likely a fuzzy line
Oct
15
comment What's the functional difference between the NEF and normal ANNs?
an ANN is just a network of simple neurons (usually designed in some connective pattern, designed to serve a purpose). NEF utilizes an ANN to solve differential equations. So of course, ANN, being the more general term, has more capabilities... but once you choose an instance of an ANN for a specific purpose, you begin to limit the capabilities of the ANN towards your purpose.
Sep
24
comment Why is MATLAB so common in Neuroscience?
I tried making the switch to Python and I admit there are some sexy things about it. However, in the end, MATLAB was always faster for me for development; so many packages come default and getting useful stuff of the matlab file exchange has solved every issue I couldn't program myself. For me, developing is the bottleneck because I'm not developing programs that robust to every kind of input, I frequently develop new programs for new tasks, new data formats, new research projects and they're never used again after the result is obtained.
Sep
17
comment Are there any serious neuroscientific theories of emotional valence?
More specifically, I meant the free energy principle. If you haven't seen the original paper by Frist, then here!
Sep
12
comment What's the functional difference between the NEF and normal ANNs?
What the NEF does is translate neural coding into the solving of differential equaions (well functions more generally) You might argue that it's a specific implementation of ANN.
Sep
11
comment Why do scientists say brains are faster than computers?
I don't think that modeling the brain processing is a fair comparison to what a computer can do. When we model the brain processes, we do some things that are inefficient form a computational perspective, but informative from a scientific perspective. A computer scientists trying to achieve the same processing task without care for the way neurons/brains do it will be able to make a much more efficient algorithm.
Sep
11
comment Why do scientists say brains are faster than computers?
Accepting @ChuckSherrington 's point, I would say that the computer is much faster at serial tasks (if you give it a list of operations, it can complete them one after another much faster than the brain) yet... the brain is better at parallel processing and integrating information from several different sensory systems into one cognitive moment.
Sep
9
comment Number of presynaptic inputs per cell in primary visual cortex
There's no need to lawyer up, I made no proposition to close your question; but if you post it on the biology exchange as well, you'll have a larger audience (and possibly people more equipped to answer).
Sep
8
comment Number of presynaptic inputs per cell in primary visual cortex
Hello! This would be a better question to ask at biology.stackexchange.com since it doesn't touch on cognition.
Sep
6
comment Neurological basis of selfishness?
I'm still not clear what you're asking and your comments are getting pejorative. Please keep a civil tone.
Sep
1
comment Neurological basis of selfishness?
How do you mean?
Aug
23
comment What causes post-masturbation guilt?
My first instinct is that it's a result of being shamed about sexuality in their community, family, peer group, etc.
Aug
18
comment Is it normal for men in long term relationships to want to have sexual relationships with other women?
The effect of pheromones in humans is still a controversial subject. I do think your answer hits on an important point: quality vs. quantity. If your environment is hazardous, and infant mortality is high, you're going to want to have more children (knowing that some will die). If you're environment is stable and infant mortality is low, you can have less children and focus on ensuring their survival by putting more time into fewer children. And this is what we observe in third world (high infant mortality) vs. first world (low infant mortality).
Jun
16
comment Why do we find things fun?
I would consider them spandrels. In particular, byproducts of having evolved pleasure as a mechanism for driving behavior.
Jun
2
comment Where do our memories get stored and how are they retrieved again?
The "too broad" flag, to me, is more for technical how-to type questions that are the norm on the original stack exchange. I'm not sure if broad questions are so bad in a scientific pedagogical situation.
Jun
2
comment Difficulty of having profound scientific discussions with more than 2 or 3 people?
Sometimes, some of the people who are interested in the subjects may just want the discussion to be more open to people who are not as keen just to be polite.
May
29
comment Is there any evolutionary theory for self-destructive behavior?
perhaps you could backup your assertion about self-destructive behavior being a stress response with some literature. Explaining behavior in terms of evolution is very difficult. I also see two ideas here: giving up vs. self-destructive.
May
9
comment What is the mechanism explaining the effect of a positive attitude on immune system functioning?
@ArtemKaznatcheev, I have provided more evidence for this answer.