Questions tagged [neuroscience]

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

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Is the function of the brain ultimately 'movement', really? [closed]

A popular neuroscientist posits that the ultimate function of a brain is movement, as explained by this eloquent speaker and famous neuroscientist (link to TED talk). People's immediate reaction tends ...
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Rat studies and are they reliable?

Most medicine successful on Animals are not successful in humans, so now I am wondering if rodents used to study addiction and the brain give reliable information or data we can use.
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Allen Carr's easy way and it's scientific aspect [closed]

So Allen Carr's easy way, an addiction treatment center argues that the pleasure induced by an addictive behavior or substance is an illusion or relief from withdrawal and not real pleasure, they ...
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Changes to the brain regions due to PTSD

I mentiond in my other question today (Changes to the amygdala due to PTSD) that the one thing I have often heard regarding changes in the brain due to trauma and PTSD is that the amygdala is enlarged ...
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Changes to the amygdala due to PTSD

The one thing I have often heard regarding changes in the brain due to trauma and PTSD is that the amygdala is enlarged (e.g. Kuo et al, 2012). This is understandable considering the amygdala is ...
2 votes
2 answers
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Why both hypokinetic and hyperkinetic changes are seen in Parkinsons?

In Parkinsons disorder the substanstia nigra pars compacta get affected and there is destruction of the dopaminergic neurons, which ultimately disturbs the direct and indirect pathways. Now we know ...
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How does brain makes descisons? [closed]

I have recently started studying about brain network analysis, Does brain makes decisions based on neuron connections? ex: If say 10 neurons were there, if I see pen to recognize that as pen does the ...
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Do somatic markers affect "system 2" in Dual Process Theory?

A lot of the literature seems to describe system 2 or type 2 cognition as rational and logical. I've seen arguments outline that there isnt a perfect division between the two systems but did Kahneman ...
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Converting mgz to img in freesurfer?

I have spm files in nii that I've converted to mgz, but I need in img to co-register in spm (I think?) Ultimately, I just want to cortically project my spm images (https://surfer.nmr.mgh.harvard.edu/...
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1 answer
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How to evaluate the convergence of a staircase?

I have a 2AFC staircase, with transformed up and down method (2up 1 down) or (2down 1 up), with equal step size (at the beginning there are higher step sizes, at the end there are the lower value). ...
-2 votes
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Why do we become bored of a specific stimulus after multiple exposures to it? [duplicate]

Why do we become bored of songs, films, stories, jokes, food after being exposed to them or experiencing them multiple times? Why is it when our cortex becomes adequate at predicting the outcomes of a ...
1 vote
2 answers
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What does "all-or-nothing" means in spiking neural network?

I'm reading a paper by Auge et al. (2021). In the introduction they said "Spiking Neural Networks (SNNs) use short 'all-or-nothing' pulses to encode and transmit information". I'm not sure ...
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1 answer
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How does body temperature and oxygenation affect thinking ability?

I'm interested if the brain works better when the temperature is higher than usual and the amount of oxygen in the air is a bit lower than in fresh mountain air. This has been my personal experience.
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Why are synapses that are connected to co-transmitting presynaptic vesicles uniformly distributed on the postsynaptic neuron?

This paper on functional implications of co-release and co-transmission says that "Consistent with a co-transmission phenotype, cholinergic synapses are uniformly distributed on the postsynaptic ...
8 votes
1 answer
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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
1 answer
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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. ...
2 votes
1 answer
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Is there any evidence that some people who claim to see auras around persons actually see them?

I have found that seeing "auras" is used for diagnosis of some neuropathologies. However, I wasn't able to find evidence that some people truly see what is colloqially known as auras. Is ...
2 votes
1 answer
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What is the difference between brain parcellation and brain segmentation? (question based on Freesurfer)

What is the difference between brain parcellation and brain segmentation? (question based on Freesurfer that produces parcellation volume and segmentation volume measures)
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New methods of treatment of psychological trauma?

Classical methods of psychological treatment of trauma help many people, but there is always a percentage of the patients those are can’t be healed with classical methods like Drug interventions, ...
2 votes
1 answer
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How does acute tryptophan depletion work?

The literature online about this practice is very poor. The theory goes like this: A mix of amino acids that does not include tryptophan will lower the proportion of tryptophan in the bloodstream. ...
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How do sensations differ from each other? [closed]

The sensation of tough material and soft material is not the same but in both senses, sensory cells are the same. How do these two sensations differ from each other? Does this information carried like ...
1 vote
1 answer
32 views

Is there any method of studying drugs which collects subjective verbal reports?

I’ve been fascinated by the notion of how mental phenomenon can even be studied scientifically for a long time, given that they are not immediately available to measurement. I tried to start with a ...
2 votes
1 answer
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Are centre-surround antagonism and lateral inhibition synonyms?

On Wikipedia, there is one page for centre-surround antagonism and one for lateral inhibition. They both concern the activity of a neuron being reduced by stimuli present not in the center of its ...
4 votes
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Do brain cells get replaced/repaired completely?

Okay so this is a claim that you can see made on the internet that the none of the atoms remain in your body forever. This caught my interest cause this could be used to show that consciousness is not ...
3 votes
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in this attentional blink experiment why is the second letter visible when the lag is low but not when the lag is high

this image is from the book Consciousness and the Brain by Stanislas Dehaene the book describes the image as follows : The attentional blink illustrates the temporal limitations of conscious ...
2 votes
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Why do antipsychotics bind to D2-like instead of D1-like receptors?

My understanding is that: The dopamine hypothesis of schizophrenia states that the positive symptoms are a result of excessive neurotransmission of dopamine in the mesolimbic pathway. D1-like ...
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What is the "reverse-averaging" technique used in Electroencephalography (EEG)?

Im reading about the Bereitschaftspotential or Readiness-potential "discovery" and I see it was done by "reverse-averaging" the ressults of using EEG to measure certain voltage ...
2 votes
1 answer
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Is there a mechanism in neurons to temporarily increase membrane resistance?

I was just learning how electrical signals travel down the neuron and learned that electrical signal flowing out through the membrane significantly hinders the voltage to move down the axon. This ...
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Do spinal and peripheral nerves associate with hebbian learning?

For instance, if a musician frequently makes a series of actions, neurons that are involved in such sequence should also associate inside the spine - according to "neurons that fire together wire ...
2 votes
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In pyramidal neurons, are there any differences (morphological or otherwise) between the basal synapses and proximal synapses on the apical tuft?

In pyramidal neurons, are there any differences (morphological or otherwise) between the basal synapses and proximal synapses on the apical tuft ? As far as I know, they both have dendritic spines, ...
16 votes
3 answers
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What are the key examples of the use of computational methods in the study of biological neural networks?

In an upcoming postdoc, I'm going to be looking through biological neural network data in the hopes of finding some interesting "patterns". I'm coming at this field from a mathematics/computer ...
2 votes
1 answer
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What's the exact definition of a cognitive mechanism?

I've been trying to get to a specific definition of a cognitive mechanism, but googling it surprisingly didn't give me anything. The only things I've found out are : How to know if something can be ...
3 votes
1 answer
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Lunar cycles linked with mental health issues?

From what I can find... Anecdotally, my mother used to work in nursing homes for the elderly and found that around the full moon, patients slept less and were more agitated. Anecdotal evidence ...
2 votes
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Default mode network's function in information consolidation?

I remember seeing a lot of research about this a few years back, suggesting replaying memory's during wakeful rest might help long term memory retention, although it was inconclusive. I was wondering ...
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Measuring spike activity with an electrode: using the principles present in galvanic cells, can one explain how current flows in the electrode system?

Thank you for reading this. In a galvanic cell setup and around each electrode in that setup, we have species that either undergo oxidation or reduction—resulting in the literal flow of electrons ...
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What's the extent of neuronal synaptic connectivity in the "average" brain (scenario given)?

Let's say we pick a lower motor neuron and start tracing that neuron (starting at the motor endplate) in a retrograde fashion. Every time we end at a neuronal body, we also trace back neurons whose ...
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1 answer
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Does only the time-series data of fMRI matter or does spatial distribution of the signal values also matter?

I was denoising fMRI data using GLM and had a question regarding the “data” of fMRI in general. (For reference you can look at the “GLM” part of https://fmriprep.org/en/stable/outputs.html or https://...
2 votes
1 answer
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Alpha and Beta waves during BCI Training

I'm using the EPOC X EEG Headset from Emotiv. I was recording the raw EEG data while doing BCI training to "push" a cube on the EmoticBCI application. Going back to the recording after the ...
5 votes
1 answer
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What causes this motion illusion?

There are some questions here about various optical illusions. I stumbled upon this one and would like to find out where does it belong. Wikipedia has a page about illusory motion that mentions ...
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BOLD->functional connectivity->spectral graph theory (e.g. Atasoy 2016) vs BOLD->Fourier Analysis

My read of "Human brain networks function in connectome-specific harmonic waves" (Atasoy 2016) seems to be that you can model brain activity in terms of standing waves of the connectome (...
15 votes
1 answer
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How much power, in watts, does the brain use?

When IBM's Watson won on Jeopardy a few years ago, it did so using a room full of servers with a cooling system and a fat power feed, competing against a couple of humans powered by the equivalent of ...
3 votes
1 answer
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Default Mode Network and: hyper-connectivity, hypo-connectivity, interconnectivity and intraconnectivity

I have been reading into DMN and its relationship to psychopathology. However, in some papers I have noticed terminology that mentioned hypo-,hyper-,inter-, and intraconnectivity. While I understand ...
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Prereq sciences for Neuroscience

I've been a professional software developer for 7 years and have gotten into EdTech over the last 4 years. I'm building my own EdTech apps for students, and in doing so I decided to enroll in a Master'...
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Complete digital copy of a brain: What are the main data metrics?

For the field of a theoretical scenario, future scientists map the body of an arthropod which has about 100,000 neurons and duplicate a precise copy of the animal onto SSD, including the dendrite ...
2 votes
1 answer
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How to calculate Fano Factor for spike train data?

I've heard this used many times but never had to do it myself. How does one calculate Fano Factor (FF) for spike train data? Let's say that you have for some neuron the spike count in a certain time ...
2 votes
1 answer
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What do brain waves look like under the influence of psilocybin?

I am curious about what brain waves (EEG) look like under the influence of psilocybin mushrooms or LSD. Is there any research on subjects in psychedelic states and how their brain waves change ...
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Why are there different neurotransmitters in central nervous system?

If an effect of binding the neurotransmitter depends on the receptor type, not the neurotransmitter itself, then why don't we have just one neurotransmitter and many different receptors?
3 votes
1 answer
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How is sexual arousal different in men and women?

I was watching ASAPScience video on the Male vs Female Orgasms. At 1:45 they say that PET scans of brain show that arousal of men and women are different. How exactly are these different, as in what ...
1 vote
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How do anxiety disorders affect our brains on a neuro level?

I was specifically wondering about a) The effect on plasticity. Given that stress has been implicated to reduce plasticity, I assumed anxiety disorders would have a similar effect but the only paper I ...
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What are the pharmacodynamics (Ki nM) of the monoamine neurotransmitters?

Ok, so any psychoactive drug will have different affinities for different receptor types. For instance, sertraline has an extreme affinity for the SERT and very little affinity for the 5-HT1A receptor....

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