Questions tagged [neuroscience]

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

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111 views

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

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 ...
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1answer
147 views

Interpretation & Actual Result of “10% of your brain” Myth [duplicate]

It is well known that the common myth that an individual only ever uses 10% of their brain is.. well, a myth. I had a question about a possible interpretation of this idea, and a follow-up question ...
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2answers
583 views

Neural Microfilaments for Computation?

I just watched an interesting TED talk (http://www.youtube.com/watch?v=1d5RetvkkuQ) where a Stuart Hameroff proposes that a neuron's microtubules are responsible for computations, and that they are ...
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3answers
846 views

How are personality traits “encoded” in the brain?

How are personality traits – such as optimism, sensation seeking or need for cognition – "encoded" in the brain? Do people with different levels of, say, extraversion have different neuronal ...
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2answers
127 views

What are the temporal limits of the auditory system?

I would like to know what the time scale is of the human ear. I mean, what is the shortest duration of a sound that a human ear can notice and what is the longest duration of a sound that a human ear ...
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1k views

How does subjective experience arise from matter?

Forgive me for lacking rigor, but if what I know is correct, it is established that consciousness and other higher functions characteristic of humans are a consequence of our cortex, specifically ...
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2answers
363 views

Can LSD connect sensory regions in the brain?

How is it possible that after using LSD you can hear sounds and see colors? I have my own experience with this phenomenon. When I´m lying totally relaxed in bed and suddenly a door is closed loudly, I ...
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2answers
81 views

Cerebellum question

Sorry if this sounds at all like pretentious armchair theorizing(it basically is), but I have a question which I can't really figure out how to search. So, given the resemblance of the cerebellum to ...
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1answer
118 views

Can neuron change from excitatory to inhibitory (and vice versa) over time?

According to this answer a neuron can release only specific type of neurotransmitters at the time, however, could it change over time? For example a neuron that now releases only inhibitory ...
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2answers
801 views

Does electricity pass through synapse?

As far as I understand, when a neuron fires the action potential generated in a cell body reaches only the presynaptic part of the synapse, then triggers the transmitter to pass through the gap, and ...
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2answers
2k views

How does speed listening work?

I've recently gotten into listening to podcasts. Over time, as I get accustomed to the speaker's voice, I'm able to increase the speed of the podcast to as high as 3x speed. It still feels "normal" to ...
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1answer
446 views

Physiological differences between brains of Conservatives and Liberals

I work for a non-profit research organization and I have been assigned to do research on this topic. I have been doing my best to find studies on this topic but every website and article seems to ...
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2answers
273 views

How addictive is Heroine?

I keep hearing that "*Heroine is so addictive the very first dose is enough to get you hooked on it*". Personally, I have a hard time believing any substance could do that to you. But I could believe ...
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1answer
218 views

Do cats exhibit the bouba/kiki effect?

I was fascinated when I first read Ramachandran's article about kiki bouba effect, and I was wondering if cats experience the same thing... As Ramachandran proved, our angular gyrus is responsible for ...
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2answers
235 views

Are axon terminals always part of a synapse, or are there any that just release neurotransmitters into the ether during an action potential?

By "ether" I mean to no post-synaptic cell in particular. If this is the case, how common is it for an axon terminal to not be part of a synapse? Related question: do axon terminals form only as ...
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3answers
754 views

Is it possible to objectively measure the amount of pleasure a person is experiencing?

I'd like to know if it's possible to quantify somebody's "fun meter". Maybe by measuring the amount of endorphin produced. Because every person is unique, I don't expect that amount to make another ...
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2answers
107 views

Would you classify confusion as an emotion?

I'm writing a short essay on emotions and I stumbled upon a few references of confusion being an emotion but no solid exclusive research results focusing on confusion as an emotion. If it isn't, what ...
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1answer
189 views

How does the brain generate answers to questions?

Firstly, I would say that this question is probably beyond current knowledge. But I would like to hear the latest theories. Given an input "Can you name as many animals as you can until I say 'stop'?...
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1answer
580 views

What is the role of (why )universal gas constant in Nernst equation?

The Nernst equation is an equation that relates the the total voltage, i.e. the electromotive force, of the full cell at any point in time to the standard electrode potential, temperature, activity, ...
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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 ...
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2answers
326 views

Is there a less colloquial term for the phenomenon known as “brain zaps”?

There is an unpleasant phenomenon, colloquially known as "brain zaps". It is generally associated with withdrawal from antidepressants, but this isn't always the trigger - I sometimes have it even ...
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1answer
61 views

Why is the occipital lobe behind instead of in front?

These are regions of our brain: Our eyes are in front below our forehead, however, the visual area Occipital Lobe is behind. Are there any biological reasons for this? why shouldn't Occipital Lobe be ...
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1answer
97 views

What is the human brain made of?

I read an article that stated that the human brain contains 60% fat. Is this fatty tissue structural building material? Or does it just serve as an energy source for the mitochondria? Since our body ...
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1answer
70 views

What happens in the brain that allows access to a previous unavailable memory?

What happens in the brain that allows you access to a memory previous unavailable? For example I forgot the name of someone I've known for years. Two weeks later, without notice, "Diana" popped up. ...
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1answer
237 views

Is there any disease that prevents a person from being angry?

Is there any disease that prevents a person from being angry? As a reference, the resection of the amygdala reduces feelings of fear. web links ABC news on damage to the amygdala reducing fear ...
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2answers
150 views

What exactly does paranoid mean in terms of psychoactive drugs?

When I went to my local marijuana dispensory, since recreational use of it is legal, they told me that when I first use it, I might get paranoid. When I read this word in context, I imagined somebody ...
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1answer
267 views

What do you call sensations without stimuli?

Sometimes, when you close your eyes in the dark, you see what looks like sparks or flashes. Sometimes when you are tired, your vision seems to shift sideways and realign, like someone bumped into a ...
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2answers
168 views

What's the relation between firing of dopaminergic neurons and dopamine dispersion in terms of neurophysiological processes?

Question: How does the firing of dopaminergic neurons affect the dispersal of dopamine? Evidence of my limited familiarity with dopaminergic neurons and motivation for asking the question: Most of ...
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1answer
49 views

Publicly Available NEURON models

NEURON is a software package for simulating neurons and networks in great detail. Although it's quite easy to find papers that use NEURON with a simple Google Scholar search, is there some way to find ...
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1answer
135 views

Are there studies on the effect of nicotine patches on dream vividness and dream recall?

Acetylcholine plays an important role during REM Sleep. I cite an answer to the question "Why do dreams lose clarity quickly over time after we awaken?": Activity in the PFC during sleep may be ...
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1answer
699 views

What are 'gap junctions' (electrical synapses) for?

I was reading this and I found the following sentences: Apart from chemical synapses neurons can also be coupled by electrical synapses, so-called gap junctions. Specialized membrane proteins make ...
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1answer
5k views

What's the difference between executive functions and cognitive control?

I suspect that the difference between these terms may vary from researcher to researcher, since the wikipedia page treats them as synonymous. What's the difference between executive functioning and ...
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1answer
140 views

Difference in frequencies of mistakes between use of left-right vs. up-down

I have no hard data, but from my personal experience in people specifying right or left directions (similarly east or west) and up or down (north or south, top or bottom), people frequently make ...
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2answers
622 views

Why is it hard to simulate a neuron?

I read a NY Times article about the European effort to simulate a human brain and the criticism regarding the (non-)feasibility of such an endeavor (not to mention the astronomical costs). In this ...
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1answer
570 views

Why does optogenetics not mean that perfect brain-computer interfaces are possible?

There have been multiple articles and videos circulating on the Internet claiming that optogenetics has made it possible to have perfect input/output to the brain from a computer. This is obviously ...
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1answer
485 views

Neuroplasticity and Treatment of Depression

After reading 'The Brain That Changes Itself' by Norman Doidge, 'The Mind and The Brain' by Jeffrey Schwartz and a few other books, I've become curious about the science of neuroplasticity, which, as ...
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1answer
316 views

NEO-FFI vs. NEO-FFI-3: What's the difference?

I just ran out of a large shipment of NEO-FFI booklets, so I went to order more from PARinc. This shipment has lasted since 2014. It seems that the original version of the NEO-FFI that I was using (...
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1answer
373 views

Do men, on average, have a higher general intelligence score?

I'm aware of this study that was linked during an argument: "Sex differences in brain size and general intelligence (g)" and this question Gender differences in IQ among undergraduate psychology ...
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1answer
2k views

How do brain zaps occur?

I've recently witnessed someone undergoing brain zaps and subsequent panic attacks after having stopped their SSRI medication and 48 hours partying with heavy boozing and no sleep. Having reviewed ...
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1answer
88 views

Is there a complete connectome of a minicolumn of the neocortex?

I know that there are projects that try to map brain connectivity. My question is whether there is a dataset available with the complete connectivity of just a single minicolumn of the neocortex. ...
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2answers
129 views

Spike Timing Dependent Plasticity interpretation

A paper I'm looking at titled "Synaptic Modifications in Cultured Hippocampal Neurons: Dependence on Spike Timing, Synaptic Strength, and Postsynaptic Cell Type" (can be found here) showed a ...
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1answer
99 views

How far can a signal travel in the neocortex without passing through the white matter?

Correct me if I am wrong please, from what I understand horizontal communication spans very short distance in all layers of the neocortex but layers I and II. In these two layers dendrites and axons ...
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2answers
346 views

Can two neurons in the brain be connected more than once?

Can two given neurons in the human brain can be directly connected more than once, either mutually or in the same or direction? Also, can the same neuron have transitive connections to itself (in ...
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2answers
230 views

Threshold time for stimulus to be consciously perceived. Why?

A visual stimulus must last longer than some threshold duration to be perceived consciously. For example, a light dot flashed for a duration of 10ms can't be consciously perceived. Why? What prevents ...
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1answer
3k views

What are presynaptic puncta?

What are presynaptic puncta? And what makes them different from presynaptic terminals?
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1answer
102 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. In addition, there is pruning of neural connections. These phenomena together are called neuroplasticity. Is there any ...
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2answers
1k views

Difference between brain disease and brain disorder

Is there any difference between the terms brain disease and brain disorder? They are often used in combination without ...
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1answer
170 views

What is the lifetime of the synapse in the mature brain?

I know there is synaptic plasticity in the mature brain. There is a great number of plasticity mechanisms like LTD and LTP, acting on different time scales. Apart from the synaptic weight change, ...
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1answer
342 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?
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1answer
70 views

How many different synapses can an axon form? How do they differ?

It is estimated that the in the human brain there are about 100 billion neurons. With thousands of synapses for each of them, the total number of synapses is over 100 trillion. Yet each neuron has ...

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