Questions tagged [neuroscience]

For questions on the structure and function of the nervous system.

Filter by
Sorted by
Tagged with
7
votes
1answer
121 views

Probiotics and Mental Health

While trying to find research articles within the realm of Psychosynthesis, I have been looking at the "collective unconscious" Image Source: Wikipedia Commons - (CC BY-SA 3.0) Lower Unconscious ...
7
votes
2answers
872 views

Why could too much BDNF be detrimental in terms of depression and memory?

I am interested in looking at the effects of too much BDNF and other proteins such as repressor element one silencing transcription factor (REST). Most research suggest that elevated levels are ...
7
votes
1answer
563 views

How do auditory and visual hallucinations differ within the brain?

I asked this question. It occurs to me that auditory hallucinations may well be generated in a different part of the brain to visual hallucinations. From my understanding, some hallucinations involve ...
7
votes
1answer
69 views

How many thalamocortical relay cells synapse onto each spiny stellate cell in neocortex?

I am curious about how many different thalamocortical relay cells synapse onto each layer IV spiny stellate cell, on average? The answer is likely to be different per region and species, of course. I ...
7
votes
0answers
156 views

Supplementary Motor Area or Juxtapositional Lobule Cortex

Harvard-Oxford Cortical Structural Atlas now calls the 'Supplementary Motor Area' the 'Juxtapositional Lobule Cortex (formerly Supplementary Motor Cortex)'. I've looked for papers that explain the ...
7
votes
0answers
302 views

Do expert computer gamers have unusual physiological or mental characteristics? [duplicate]

Possible Duplicate: Any work being done on Perception, Action, and/or Cognition in Video games? Are there any research studies that show this? See a thread on Quora for some initial discussion, ...
6
votes
4answers
939 views

Getting started with EEG data

I want to get started with getting signals from EEG and learning on how I can read data. I have some programming skills, so designing a database and manipulating data with ruby (python seems also cool,...
6
votes
3answers
446 views

Theoretical limit to the use of mental faculty of the brain

A lot of articles stress the importance of having to train the brain (By training the brain, I mean the cognitive faculty of the brain for learning things and not brain's normal functions) since the ...
6
votes
2answers
2k views

How would synapses behave if resting potential was zero?

Assuming that the resting potential is zero and the other mechanisms were exactly the same, how would it affect the generation of spikes in terms of excitatory and inhibitory postsynaptic potentials(...
6
votes
3answers
1k views

Are there neural loops within a column or an area of the cortex?

Neuronal networks can make loops because a neuron has a direction (from dendrite to axon). What's the smallest area in the cortex where we can find a loop and what are these loops? I understand ...
6
votes
2answers
2k views

Is variation in human brain size related to mental functioning?

It seems that the head size of human beings has evolved to be relatively similar, yet there is still some amount of variation. While I'm sure the correlation is not absolute, I read that larger heads ...
6
votes
1answer
779 views

Is there a biological limit for “amount” of happiness?

I have heard about neurotransmitters like dopamin and serotonin that are supposed to play a role in our feeling of happiness. I don't know how these chemicals works in our brain, but I am thinking ...
6
votes
2answers
2k views

Why is MATLAB so common in Neuroscience?

It is common knowledge that neuroscience -- particularly experimental neuroscience -- uses MATLAB more than any other programming language. I have always just taken this as a given, and pointed to ...
6
votes
1answer
314 views

Is it dangerous to take an antipsychotic drug irregularly?

I've read the case of Witty Ticcy Ray: a 24 years old man with disabling Tourette’s syndrome. The first Dr. Sacks's treatment, with Haldol, provokes a strong change in Ray's behavior: from tics and ...
6
votes
2answers
2k views

Sensitivity of human eye to luminance

I heard once that the human eye has a logarithmic scale for luminance, e.g. to "feel" that a surface is three times as luminous compared to another, the former emits a light 8 times more powerful than ...
6
votes
2answers
174 views

Parallel arrangement of capacitor and resistor in leaky integrate-and-fire model

I have read from several sources that in the leaky integrate-and-fire model of a single neuron resistor (leakage) and capacitor (membrane potential) are arranged in parallel. Look at the following RC ...
6
votes
2answers
341 views

Do the colour blind have a distinct visual cortex structure?

Studying the structure of the visual cortex, it seems there are many neural structures specifically dedicated to detecting and interpreting colour. For example, parvocellular cells are particularly ...
6
votes
1answer
125 views

Is the process of long term potentiation (LTP) definitively linked with brain plasticity?

Given that the process of Long Term Potentiation (LTP) is one of the processes that increases synaptic efficacy: Is it reasonable to conclude that the process of LTP is sufficient and necessary to ...
6
votes
1answer
225 views

Classic cognitive neuroscience studies that highlight conclusions that could not be drawn from behavioral experiments

Background: I studied psychology prior to going into cognitive neuroscience for my PhD. While I know my own area in depth, I lack the kind of broad overview that people who have done their Masters in ...
6
votes
1answer
136 views

Can the neurological damage done by alcohol be reversed?

I read online that heavy alcohol consumption can lead to neurological damage, specifically in areas that affect your cognitive performance and memory but what I couldn’t find is if the damage can be ...
6
votes
3answers
298 views

Thinking with organs/systems other than the brain

Neurohormones are produced in many different bodily systems other than the brain--skin, intestines, stomach, etc. Has there been any research suggesting whether or not some people might actually ...
6
votes
1answer
1k views

Voltage sensitive dyes technique: 2-photons microscopy vs confocal microscopy

I just discovered voltage sensitive dyes technique and I was wondering what would be the advantage to use 2-photons microscopy compared to confocal microscopy? They are both fluorescent techniques ...
6
votes
1answer
95 views

Does synesthesia lack symmetry?

Some synesthetes report seeing bright flashes when hearing a loud noise. However, in the same person, bright flashes of light are not reported as being loud. I've read of other examples like this; ...
6
votes
1answer
316 views

Visual acuity and offset stimuli

I'm currently setting up and experiment that utilises a visual search task that contains a circular array of target letters and a distractor that falls outside the circle. Obviously the further away ...
6
votes
1answer
93 views

How is averaging used in calculating the Bereitschaftspotential?

I have a question about the averaging involved in the Bereitschaftspotential. On the wiki page you can read that, because it is so small, the Bereitschaftspotential only becomes apparent after ...
6
votes
1answer
82 views

What is it about our brain that breaks when we hear ourselves with a delay?

If you've ever heard an echo of yourself on phone or video chat, you've probably noticed the phenomenon that you completely forget what you were talking about when you hear yourself talking. Have ...
6
votes
1answer
2k views

Does every human brain have the same shape?

Apart from the general structure (6 layer cortex, same areas, etc.) does every brain have the exact same number and arrangement of sulci, gyri, etc? Do these elements have the same shape?
6
votes
2answers
302 views

Are there useful applications for three channel consumer EEG?

I stumbled upon the consumer EEG Melon (at Kickstarter). It has three electrodes and is advertised as measuring how "focused" you are. In the FAQ it says: The Melon headband has three electrodes. ...
6
votes
1answer
996 views

Neurotransmitters appearance in the evolutionary process

Recently I disagreed with the assumption, that lots of neurotransmitters came within recent 10,000 years of Homo Sapiens evolution. Judging from the available information sources, there is possibility ...
6
votes
2answers
253 views

What exactly are the X and the Y axis of a brainwave?

I can't seem to wrap my head around how a bunch of organic transistors (neurons) could possibly produce a wave? What exactly is a brain wave? If you graph a brain wave what exactly would your X and Y ...
6
votes
1answer
145 views

How is the brain cooled?

I remember[ed] reading a story on a brain-inspired integrated mechanism for energy-delivery and cooling in (experimental) new computer chips: The human brain packs phenomenal computing power into a ...
6
votes
1answer
109 views

What hormones stimulate non-sexual intimate behaviour?

From wikipedia article sexual motivation and hormones, it is said that testosterone/estrogen, oxytocin and vasopressin are stimulating sexual behaviour. But I'm wondering if any of these hormones are ...
6
votes
1answer
229 views

Variation in prefrontal cortex development

I have read everywhere that the prefrontal cortex is not fully developed until about the mid twenties, but everyone's brain develops differently. Is it possible for a teens prefrontal cortex to be ...
6
votes
1answer
52 views

Does NMDA-receptor activation depend on neighboring AMPA-receptor activity?

This question is coming out of a couple points of confusion after I learned about about NMDA receptors' role in LTP. I got the impression that after AMPA receptors were activated enough, which ...
6
votes
1answer
221 views

Is V1 involved in visual imagery?

It's well known that mental imagery shares the neural substrates of its respective modality, despite dissociable multivariate patterns. For example, visual imagery can be decoded across the ventral ...
6
votes
1answer
650 views

Why our brain can't fool itself to constantly produce dopamine?

There are experiments [1] showing that our brain tries to maximize amount of dopamine. At the same time it is the brain who controls the dopamine level, because the reward system is located in the ...
6
votes
2answers
84 views

Spike-timing-dependent plasticity versus Homeostatic plasticity

How can spike-timing-dependent plasticity and homeostatic plasticity both be right? If spike-timing-dependent plasticity consistently tries to strengthen connections, but homeostatic plasticity ...
6
votes
2answers
188 views

How would the blind experience a hallucinogen like LSD?

I have heard that LSD allows you to see ridiculous things. But they are things that you have seen, or can imagine to see. If you've never seen before (like a blind person), what effect will LSD have ...
6
votes
2answers
890 views

Grid cells : Between what is the correlation of autocorrelogram measured?

In their seminal paper Hafting, Torkel, et al. "Microstructure of a spatial map in the entorhinal cortex." Nature 436.7052 (2005): 801-806.‏ the Mosers have discovered the grid cells. To show the ...
6
votes
1answer
73 views

Do we know a priori any rules about the world?

1) Is there any set of rules that human beings or, more generally, other sentient living beings know a priori before any learning process? In other words, do sentient living beings always were born ...
6
votes
1answer
169 views

Does training affect the tactile oblique effect?

In the visual sciences it is known that the oblique effect can be reduced by means of training. The oblique effect is observed when testing subjects psychophysically with a grating acuity task (e.g., ...
6
votes
1answer
998 views

What is the brain power devoted to vision and haptics?

I heard a talk by Vincent Hayward on the sense of touch as a multi-modal system, where he claimed that the brain power devoted to haptics is at least as big as the one devoted to vision. I have found ...
6
votes
2answers
3k views

Why does handwriting change?

In New York magazine it is stated: [I]t’s strange that your handwriting changes over time; scientifically speaking, there’s no reason it should. At a certain point, you’ve learned all there is to ...
6
votes
1answer
246 views

Does STDP make the Hebbian learning rule redundant?

On Scholarpedia they introduce STDP (spike timing dependent plasticity) as a temporally asymmetric form of Hebbian learning, making it sound as if the original Hebbian rule still has relevance in ...
6
votes
2answers
345 views

Does each sensory neuron type have a characteristic spike sequence pattern?

Background It is known that all sensory information is input to the brain as neural spike sequences. Now, to distinguish between the spike sequences generated by retinal red/blue/green cone cells from ...
6
votes
1answer
232 views

How are tactile pleasure and pain differentiated in the somatosensory cortex?

A recent question here asked about (mostly) how pain and pleasure are differentiated in pathways involving reward/aversion cues. But there was some confusion as to what the question really wanted to ...
6
votes
1answer
226 views

Why are empty spaces around hippocampus and striatum not filled with astrocytes?

I understand that, generally, when a neuron dies, the vacated, empty space will form a scar in the form of an astrocyte. Basically, the astrocyte thus replaces that neuron. Why then are there empty ...
6
votes
1answer
138 views

What is the role of non-synaptic plasticity in learning and memory?

Is non-synaptic plasticity (e.g. changes in the spike threshold) believed to play a large role in learning and memory? If so, which roles are these effects believed to play?
6
votes
1answer
124 views

How common is it for twins conjoined at the head to share thoughts and visual stimuli?

I've always been interested in the possibility of a pair of conjoined twins, joined at the head, being able to read each other's thoughts, react to stimuli that one of them can't see/hear/feel, and ...
6
votes
1answer
152 views

What are the effects of visual deprivation on mental health and the other senses?

How do blind people who haven't always been visually impaired deal with their day-to-day lives? I've heard rumors (very, very unreliable rumors) that once you stay in the dark for too long you'll ...

1 2 3
4
5
18