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

learn more… | top users | synonyms (1)

4
votes
2answers
55 views

Long term effect of using noise generators

Some people use noise generators as http://playnoise.com/ to reduce distraction by background noise. Is there any research on the long term effects of this? Does this affect the neuronal connections ...
4
votes
2answers
57 views

Is there a difference between hearing and decoding the sound?

I presume that deafness is the inability of hearing any sounds. And I presume that it's also possible to be less able to decode (and translate to a meaningful message) what others speak [happens a lot ...
2
votes
0answers
31 views

Can serotonin levels be altered with mere mental fortitude?

Most people get "depressed" every now and then - nothing serious, but people sometimes feel down. I am wondering if positive self-affirmation can physically increase serotonin levels in your brain, ...
3
votes
1answer
76 views

Is meaning-seeking behavior a biological optimization problem?

In short, I'm interested in cognitive, neuroscientific, biological and/or computational perspectives on what we vaguely refer to as meaning seeking. Of course, this is a large topic, but any ...
4
votes
2answers
163 views

Colorado Boulder study about brain morphometric measures of Cannabis users methodologically weak?

I'm relating to this study: http://www.jneurosci.org/content/35/4/1505.short The researchers found no differences in subcortical brain structures for daily Cannabis users vs. controls. However the ...
6
votes
1answer
88 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 ...
3
votes
2answers
43 views

Are there mental reflexes?

Similar to knee-jerk or withdrawal, are there any innate reflexes in cognition? Are they based on personality, or are there any that are universal?
2
votes
1answer
37 views

How does my spinal cord know to take reflexive action?

As in, how does my body know that a stove is not hot enough to warrant a reflex? Is it because there isn't a sudden electrical surge going through the nervous system?
3
votes
0answers
28 views

Why does the unilateral 6-OHDA lesion Parkinson's model cause ipsilateral rotations?

As far as I understand, the loss of dopaminergic neurons should hinder movement in the contralateral side of the body, resulting in contralateral rotations when the animal tries to move forward.
1
vote
1answer
34 views

What are the neurobiological factors related to depression?

While it is agreed that neurotransmitters aren't the primary "cause" of depression, what other factors are a part of this mental illness that focus on the neurobiological aspects of it?
0
votes
0answers
30 views

Perspectives on Inner Monologue Recording;

Assume a distant future when decoding a person's inner voice is a possible task, by some technological mean. By inner voice I'm referring to the internal monologue that develops when one is thinking. ...
2
votes
1answer
31 views

What are the smallest neurons ever identified?

What are the smallest neurons ever measured? I'm happy with any superlatives, such as the thinnest axons or dendrites, smallest somata etc. Thank you :)
4
votes
2answers
64 views

Activity in a brain region and additional blood requirement: What is the causal relation?

May I know causal dependence of the blood flow in the brain? How it is determined by the brain that particular brain region requires additional blood?
0
votes
0answers
14 views

Smallest neurons [duplicate]

What are the smallest measured neurons ever measured in the animal kingdom? I did some research but couldn't find a definite answer. In us, it's the cerebellar granule cell as far as I know, but I'm ...
2
votes
1answer
25 views

Determining the position of the calcium ion in the three dimensional space

Is it possible to determine the position of a single calcium ion or its population in the context of a three dimensional space with relatively good time frequency, say 1 Hz, taking into account ...
4
votes
1answer
44 views

Why is the order of brainwaves not labelled “alphabetically”?

The brainwave - frequency breakdown is as follows: Delta wave – (0.1 – 3 Hz) Theta wave – (4 – 7 Hz) Alpha wave – (8 – 15 Hz) Mu wave – (7.5 – 12.5 Hz) SMR wave – (12.5 – 15.5 Hz) Beta wave – (16 – ...
2
votes
1answer
49 views

What is so “potential” about action potentials?

When an action potential is propagating through a neuron, it seems to me that the time for "potential of action" is over, and that we are now just in a state of "action". Why don't we just call action ...
2
votes
1answer
40 views

Explanatory gaps in the formation and propagation of action potentials

To my understanding, the steps of an action potential are as follows: The neuron is at rest--there is a negative charge (K ions) inside the cell, and a positive charge (Na ions) outside the cell. ...
1
vote
0answers
13 views

Do studies exist that can map specimens of neocortex to the functions they perform(ed) in vivo?

Much brain research has proposed that the brain (the neocortex, esp.) is set up in areas - an area for faces, an area for language, etc.. The experiments typically go 1) damage an area 2) observe ...
4
votes
1answer
34 views

How many dendrite connections vs axon terminals does a multipolar cerebral neuron have?

I find countless places that say neurons have tens of thousands of "connections" or "synapses" and one axon. Do neurons have tens of thousands of dendrite connections, and a few axon terminals; or a ...
2
votes
0answers
38 views

How can we use EEG data to predict urge of smoking?

I am from Computer Sciences background. The problem which I want to target is to be able to successfully predict (to a degree) that a person is going to smoke in near future. I have a brainwave ...
0
votes
0answers
13 views

Role of white blood cell inside brain

Inside brain, Microglia cell is responsible for phagocytosis. It seems that brain can function properly without white blood cell. Also according to my research white blood can be hazardous to brain as ...
0
votes
1answer
6 views

Benefits of using more complicated neuron models in NEF models

The NEF allows you to use almost any neuron model as long as it has an equation for it's activity and it's spikes in some way. Usually, a simple leaky-integrate-fire (LIF) neuron model is used, but ...
3
votes
1answer
36 views

Can fMRI and EEG signals be generated from NEF models?

The basic function of the NEF is to map the outside world onto neurons, using the firing rates of the neurons. It also supports various neuron models. Have these firing rates been used to create EEG ...
2
votes
1answer
33 views

What is the difference between a biological and behaviorist perspective in psychology?

I was recently reading through a textbook and was unable to clearly identify the differences between the two due to a vague definition of both. Can someone provide an in-depth explanation of the two ...
2
votes
0answers
23 views

How can we analyse user behavior to predict urge of smoking?

The problem which I want to target is to be able to successfully predict (to a degree) that a person is going to smoke in near future. I want to look at the relationship between chemical reactions ...
3
votes
3answers
87 views

Can repetitive sports-related head injuries make a person senile many years later?

Would repetitive football injuries to the cranium show up decades later, causing symptoms resembling mild retardation, OCD, etc.? What is the best way to determine this in terms of imaging, testing, ...
0
votes
1answer
38 views

Regarding the mind and what it can affect

About the question 'Can the mind mind affect the brain?': Some responses are 'no' because the mind is a physical 'thing' or structure (if I read it correctly). Yet if the Mind is only a physical ...
4
votes
1answer
39 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 ...
24
votes
3answers
15k views

Why would the brain flip the images perceived by your eyes?

The following is a common scientific statement, which you don't have to google long for to find: The eye views images upside-down in the manner of a camera lens, but our brains reinterpret this ...
21
votes
1answer
914 views

Have the abilities of John Lorber's patients with limited cortical mass been further evaluated in adulthood?

Short of minor lesions or infarcts, most high-functioning adults have an intact cerebral cortex. Yet, a surprising result published anecdotally in Science in 1980 caused a lot of scientists to take ...
3
votes
1answer
47 views

What are presynaptic puncta?

What are presynaptic puncta? And what makes them different from presynaptic terminals?
7
votes
2answers
308 views

What is the difference between pre-synaptic versus post-synaptic?

I am unclear as to the exact meaning of the terms pre-synaptic and post-synaptic. Specifically, do they refer to the same neuron, either transmitting or receiving, before and after the chemical ...
3
votes
1answer
75 views

Why do some people stutter only when they are nervous?

Background: I don't stutter at least not always. For example, if I be reading out a article to myself, It is sure that I will not stutter even that I am reading it out loud. The times when I do ...
2
votes
0answers
25 views

Are there parts of the brain which don't change over a lifetime?

We know that during our lifetime the brain develops new neural connections and also there is pruning of neural connections. These phenomena together are called neuroplasticity. Is there any research ...
5
votes
2answers
54 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 ...
10
votes
1answer
123 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 ...
5
votes
2answers
61 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 ...
12
votes
3answers
364 views

What causes short-term dysphoria following intense pleasure?

I'm interested in the phenomenon of short term Dysphoria: Dysphoria is a state of feeling unwell or unhappy; a feeling of emotional and mental discomfort as a symptom of discontentment, ...
10
votes
2answers
344 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 ...
4
votes
2answers
109 views

What is the neurobiological basis of the “inner voice” used for thought or reading?

I've recently experienced a number of hypnogogic near sleep states characterized by change in thinking (stage 1-2 sleep). I noticed that if I let go and get absorbed in the state, I can follow it. I ...
2
votes
1answer
52 views

How to filter noise in EEG data

I am a computer science student and I'm doing something for a psychology professor. We have EEG data from an experiment where a person was shown 140 images for 2 seconds each. We placed 64 electrodes ...
2
votes
2answers
75 views

Neurotransmitter control via biofeedback?

According to this thread, certain regions of the brain, and even some distributed activation patterns can be up/down regulated via bio-feedback. Is it possible in theory and is there any research ...
0
votes
0answers
17 views

What chemical or neurological mechanism causes the feeling of fulfillment?

We all know that someone can find intense pleasure in something without finding it fulfilling. But what causes our feeling of fulfillment? If I knew what it was, I could be more fulfilled and ...
22
votes
2answers
985 views

What are current neuronal explanations and models of 'consciousness'?

I would like to understand more about consciousness from a neuroscientific perspective. I have a limited understanding of it in the philosophical/psychological sense through lectures. Although it is ...
7
votes
1answer
113 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 ...
3
votes
1answer
157 views

What causes lack of energy? The relative importance of testosterone versus emotional, genetic, and environmental factors

Some people assume that males lack of energy because of low testosterone. I would think that lack of energy could be due to esteem levels, emotional abuse, low self-worth, and even genetics to some ...
10
votes
3answers
156 views

What kinds of information can (and cannot) be extracted from connectome?

Several scientific projects are trying to map the connectome, such as The Human Connectome Project. The connectomes of other organisms, such as C. elegans, have been mapped already. Having an ...
3
votes
1answer
74 views

Where in the brain is meaning extracted from visual information?

I am looking into several systems for improving learning speeds and ran into a question I seem unable to answer on my own: When we read a word, it somehow gets converted into it's abstract meaning. ...
8
votes
1answer
110 views

Is there a report of a successfully EEG-Based Brain-Computer Interface (BCI) using image training?

Currently I am involved in constructing an EEG-Based BCI. The goal of the BCI is to control which light in a series of lightbulbs lights up. The plan is to use different images (i.e. a flower versus ...