For questions about the biology of the nervous system, from a macroscopic to microscopic perspective.

learn more… | top users | synonyms (1)

7
votes
2answers
93 views

Which are the multisensory brain areas?

What would be an example of a multisensory brain area, where multiple senses (e.g. smell and taste) are combined to decode the corresponding stimuli from more than one sensory organ? I was thinking ...
7
votes
1answer
2k views

Which neurotransmitters can be measured in a living human brain?

I'm interested in learning more about the modern techniques that are used for scientific studies of neurotransmitters in the living human brain. As far as I know, there are 4 neuromodulator systems ...
7
votes
1answer
309 views

What is the relationship between sociology and cognitive sciences?

I want to know what is the relationship between sociology and cognitive sciences. Let me start by short consideration of both: Sociology - well established discipline or a field of research ...
7
votes
1answer
74 views

How does one study the effect of a dietary supplement on cognition?

I've really enjoyed this talk by Molly Crockett: Beware neuro-bunk. The speaker outlines the limitations of modern neuroscience when accessing the effectiveness of dietary supplements intended to ...
7
votes
1answer
98 views

Can processing effort for sub-tasks in neural networks be measured?

I often heard statements like: 80% of your brain processing is computing the effect of gravity or, similarily: You only use 20% of your brain power My question isn't about the truth of ...
7
votes
0answers
81 views

What is the mechanism behind unihemispheric sleep in animals?

It is known that dolphins have the ability to sleep with only one half of their brain at a time. According to this popular science source: Dolphins sleep by resting one half of their brain at a ...
7
votes
0answers
50 views

What are some known roles or correlations of glucocorticoid receptor function to behaviour?

The NR3C1 gene encodes for a neuron-specific glucocorticoid receptor (GR), of which methylation levels have been shown to relate to altered maternal care and stress response in rodents (Weaver et al., ...
7
votes
0answers
281 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 ...
6
votes
2answers
159 views

What does daytime actigraphy reveal about an active and awake brain?

I have interest in the study of human motion ( Actigraphy), and have built a couple of smartphone apps using its principles. The apps look at gross motor activity of an individual. Up until now, most ...
6
votes
3answers
131 views

Can neural spiking in an organism temporarily cease?

I'm interested in modeling human brain spiking activity. Are there cases in which neural spiking completely ceases in an organism and yet later resumes? I've considered: hypothermic drowning, but ...
6
votes
1answer
102 views

What are the neurological differences between those who have a high tolerance to pain and those who do not?

I am curious to learn what are the neurological differences between those that have a high tolerance to pain than to those that do not. Specifically, by high tolerance to pain, I am referring to ...
6
votes
1answer
137 views

Hebbian Learning Rule, Local or Global?

I just learned about the Hebbian Learning Rule. It essentially says "Neurons that fire together, wire together". I'm wondering if the learning rule is affected by the spatial distance of the two ...
6
votes
1answer
204 views

What is a neurobiological explanation of borderline personality disorder?

In other words, how do the brains of those with BPD differ from those who don't have BPD? The Wikipedia article doesn't even contain any possible explanations whatsoever.
6
votes
1answer
67 views

How is epigenetic memory expressed in neurons?

Epigenetic memory is seen as the most evolutionarily plausible way of learning from experiences and gaining instinctual knowledge, as established by the answer to one of my previous questions. ...
6
votes
1answer
229 views

Measuring changes in hemispheric dominance over time

I've recently started using my trackball left-handed after being right-handed my whole life. The motivation is partly to balance out wrist strain, and partly to see how much my brain rejects the idea. ...
6
votes
1answer
192 views

Folding (wrinkles) in cortex: Why is surface area more important than volume?

When we look at the cortex of the brain, it has a folded structure. It is said that this is because this enables a greater number of neurons to exist, which is obviously advantageous. However, we ...
6
votes
1answer
267 views

What are the effects of social rejection on the brain?

What are the effects of social rejection on the brain? If the external circumstance can not change, how can the impact on the brain be reduced? What is the average sensitivity to social rejection ...
6
votes
3answers
141 views

Abstract idealized mental visualization improves motor task performance

I practice martial arts (Aikido), which involves a lot of rotation. When practicing, I find that holding an abstract image in my head, instead of thinking about the actual technique, improves my ...
6
votes
1answer
128 views

Introductory resources on developmental psychology/neuroscience

I'd like to be able to answer questions such as: What neuro/psychological functions underly competences such as empathy (or others - see background below)? What neurotransmitters are of particular ...
6
votes
1answer
62 views

Importance of Neural Synchrony to Cognition

Is there a consensus on whether computation using Neural Synchrony is reasonable or not? In "How to Build a Brain", Chris Eliasmisth cites Yuko Munakata and R. C. O'Reilly as saying that "the ...
6
votes
1answer
62 views

What can be inferred about the strength of the synapse from an electron microscope image?

In the following EM image (1um scale), there are several synapses: Image or HD Version What information about the synaptic strengths can be extracted from this image? Does vesicle count contain ...
6
votes
1answer
161 views

Transsexuality in animals other than humans?

In some research papers, transsexuality is correlated with measurable differences in brain structure. For example: Zhou et al. (1995) inspected the central subdivision of the bed nucleus of the ...
6
votes
1answer
77 views

In a central pattern generator based on reciprocal inhibition, how does one “side” get picked over the other to start out?

Consider two neurons, A and B, which reciprocally inhibit each other. If both of the neurons receive input at the same time, it seems to me that no oscillation will occur between the two. Such would ...
6
votes
1answer
300 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
1answer
86 views

Dopamine deficiency more frequent in the addiction prone?

I found this clip about dopamine deficiency. ...[P]eople with low dopamine activity may be more prone to addiction. Is the reverse also true? Does susceptibility to addiction (genetic, etc.) ...
6
votes
1answer
47 views

Why do long range axons in mammals travel in white matter tracts?

I am curious to know as to why long range, myelinated axons prefer to convene and form white matter tracts, rather than simply reach its target in an arbitrary fashion. Is there some kind of ...
5
votes
3answers
197 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 ...
5
votes
2answers
6k views

Why are some people unable to easily memorize the lyrics to a song?

Although I have listened some songs hundred of times I can't sing the lyrics to any of these songs from beginning to end without pauses. However I am able to whistle the whole song without difficulty. ...
5
votes
2answers
193 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 ...
5
votes
2answers
604 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 ...
5
votes
2answers
63 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 ...
5
votes
1answer
77 views

Are connections in the human brain directed?

Do connections in our brain have a direction, or do they behave equally in both directions? I am especially interested in the structures responsible for memory.
5
votes
1answer
69 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 ...
5
votes
1answer
108 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 ...
5
votes
1answer
89 views

Can tinnitus be measured with EEG or MEG?

Can tinnitus be measured with EEG or MEG (magnetoencephalography)? Is it visible in a power spectrum? In an ERP/ERF?
5
votes
1answer
255 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 ...
5
votes
1answer
153 views

What computerized EEG analysis algorithms are there?

I got a commercial-grade EEG headband and am trying to look at the data it outputs. The headband quantifies raw EEG signal from a single forehead dry sensor into a range of EEG bands (alpha, beta, ...
5
votes
1answer
94 views

When a person starts to scratch, why does this often start others to scratch?

Often, when a person starts scratching and complains of being itchy, whether they suggest there might be a bug biting them (for example fleas, head lice, mites) another person with them will start to ...
5
votes
1answer
75 views

How can the aversion response be explained neurologically?

If Dopamine and Dopamine D2 receptor is involved in craving, wanting and clinging towards something or incentive salience Dopamine is closely associated with reward-seeking behaviors, such as ...
5
votes
1answer
74 views

Structural descriptions of neuronal networks are important for understanding brain dysfunctions; which dysfunctions, in particular?

In a recent paper, we find this quote: The brain contains vast numbers of interconnected neurons that constitute anatomical and functional networks. Structural descriptions of neuronal network ...
5
votes
1answer
125 views

How is light processed by the human brain when awake and in dreams?

I've recently seen this great video: How your brain tells you where you are. The video discusses how certain cells within the brain fire based on proximity to objects. There are great examples of ...
5
votes
1answer
42 views

What exactly is the neurobiological mechanism behind the functioning of the human muscle?

From what I have read, its been given that muscle functioning and coordination involves two processes: frequency summation and muscle recruitment. What I want to know is that, do these two processes ...
5
votes
1answer
36 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 ...
5
votes
0answers
85 views

Why does strobe lighting trigger seizures in photosensitive epilepsy?

Photosensitive epilepsy (PSE) is a form of epilepsy in which seizures are triggered by visual stimuli that form patterns in time or space, such as flashing lights, bold, regular patterns, or ...
5
votes
0answers
49 views

What are the common nutritional deficiencies in western countries related to reduced mental performance?

What are the common nutritional deficiencies in western countries related to reduced mental performance ? I've heard about omega 3, folid acid, and vitamin D deficiencies, the last two are now reduced ...
5
votes
0answers
73 views

Do widespread brain toxins explain violence rates?

Saw this: http://www.motherjones.com/environment/2013/01/lead-crime-link-gasoline Lead emissions from tailpipes rose steadily from the early '40s through the early '70s, nearly quadrupling over ...
5
votes
0answers
88 views

How can I test whether Dorsal Raphe Nucleus(DRN) activity at night is related to variations in mood?

I'm reading this paper, which discusses Serotonin activity in the Dorsal Ralphe Nucleus(DRN), and even includes some mathematical models of how serotonin is released and reabsorbed. The paper states ...
4
votes
4answers
376 views

Computational Neuroscience software

What are the most common software tools you use in your day to day work in computational neuroscience? I am referring to neuroscience tools like GENESIS and NOT to generic tools like Excel.
4
votes
2answers
478 views

Where is the visual “image” that we “see” finally assembled?

David Hubel's online book, Eye, Brain and Vision describes in great detail our early visual system. The image that we are conscious of when we open our eyes goes through a complex path: The final ...
4
votes
1answer
609 views

How do we get used to smells?

How do we get used to smells? For example, you walk into a room with a certain stench, but it seems no matter how strong it may be, spending enough time in the room will allow you to stop smelling ...