Questions tagged [neuroscience]

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

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84 views

Brain Dynamics at the Edge of Chaos

I've repeatedly come across the claim that brain dynamics operate near the edge of chaos, but usually they do not give any useful sources on how we actually know this. I'm also aware that there are ...
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0answers
123 views

Neurodevelopmental Disorders, Cognitive Function and Causing someone to Learn

Children may elicit, either through active engagement or some feature of their personality or appearance, a response from their environment that might protect them from deprivation-related risk either ...
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3answers
761 views

Why does a neuron choose to connect to another?

I have been reading about neuron creation, guidance cues and all sorts of highly complex mechanisms used to allow one neuron axon to extend or connect - but to what end? Why does one neuron end up ...
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1answer
50 views

How does Emotional Freedom Technique (EFT) work?

There is mounting evidence that EFT, a form of therapy which combines cognitive, exposure therapy along with acupuncture point stimulation is effective - EFT for PTSD question What are the biological ...
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1answer
73 views

Myelin and Myelin Sheath

https://medlineplus.gov/ency/article/002261.htm Why is Myelin used as a term to mean the Myelin Sheath as opposed to the proper term? It is apparent to me that Myelin is the substance itself ...
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Trust after the first 200 milliseconds

In the first 200 ms of meeting someone our implicit / System 1 brain makes a number of inferences (based on age, gender, race, voice, smell among others) to determine whether we ‘like’ the other ...
2
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1answer
105 views

Understanding the 'Wiring Catastrophe'

Introduction: In 'Wiring optimization in the brain'(2000), Dmitri Chklovskii and Charles Stevens analyse the dependence of the complexity of cortical circuits on the number of synapses per neuron ...
5
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1answer
86 views

How can higher concepts get unrolled with upward and feedback connections differing?

In the neocortex, input patterns are compressed hierarchically. Sensory inputs in the lower levels are combined by higher levels to form abstract concepts. However, there are even more feedback ...
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0answers
69 views

The same neuron sometimes released different neurotransmitters, so how does this affect our interpretation of computational models?

Most studies I see compare firing rate with some observed variable (stimuli or behavior). However, they treat all spikes the same. But neurons sometimes release different neurotransmitters depending ...
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1answer
36 views

Why do solutions to problems feel simple (or obvious) once we are given them?

I was watching a video about one of the hardest maths problems even examined in the IMO (International Math Olympiad). And once I was walked through the solution, it seemed so obvious to me, as I'm ...
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2answers
154 views

William James “Principles of Psychology” and Brain Plasticity

I am reading William James' "Principles of Psychology". It is clear in his research that he was acutely aware of brain plasticity and the limited capacity for a precise "schema" (ie. static brain map)...
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2answers
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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 ...
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0answers
18 views

Bipolar Disorder Patient data

Can someone provide me with an electrocardiogram signal of a bipolar patient? I'd like to have a trace obtained in an intermittent period, i.e., when the patient is not experiencing a depressed or ...
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1answer
21 views

How can we know which types of brainwaves is dominated at particular state?

I am a freshman at Neuroscience. As I learned there are 5 types of brainwaves: Gamma, Beta, Alpha, Theta and Delta, each types have a different frequency range. So my question is when onserving a ...
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139 views

Is there a neurological reason why women do not occupy top positions in the chess ranking?

I want to turn arround this question posted on chess exchange where sociological arguments are given to explain why only two of the world's top 100 chess players are women. Are there neurological ...
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1answer
83 views

How much we should trust our brain

Our brain is trained from culture and environment that we're raised in. So we don't control what we're learning until we get to teenage. But by that time our behaviour is already been shaped. This ...
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1answer
50 views

Is the hippocampus responsible for storing or creating memories?

I've heard that severe damage to the hippocampus results in the inability to form new memories but still remember old ones. Am I mistaking something? Is the hippocampus responsible for storing ...
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2answers
2k views

Due to Gestalt Psychology, is the face an illusion?

Gestalt Psychology maintains that we perceive a whole from parts, and that we fill in missing gaps. The "whole" we perceive is more than the sum of parts we perceive - it also involves what our minds ...
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2answers
47 views

Are personality characteristics correlated with certain underlying features of the facial expressions of a person?

For instance is it possible to determine with some degree of accuracy if a person is ranks high in openness to new ideas by some photos of the person?
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1answer
59 views

Anomalous activation of temporal lobes

The result of wakeful EEG shows persistent activation of temporal lobes - high level of delta and theta waves in the left temporal lobe (3 on the scale from -3 to 3) and slightly lower in the right ...
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0answers
18 views

How common is it to include unmedicated patients in first episode psychosis (or any type of psychosis) studies?

Is anyone familiar with this open access study? Radua, J., Borgwardt, S., Crescini, A., Mataix-Cols, D., Meyer-Lindenberg, A., McGuire, P. K., & Fusar-Poli, P. (2012). Multimodal meta-analysis of ...
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1answer
122 views

Do psychiatrists and researchers themselves don't have an idea how antidepressants work?

This question may be seen as an extension of my previous question, here. I was talking to a person online where s/he mentioned that psychiatrists themselves don't have an idea as to how SSRIs work. ...
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0answers
138 views

What's the pathfinding algorithm the human brain uses?

I was trying to build a software simulation of people using different pathways in a city to get from point A to point B. I do know the Dijkstra's algorithm and the A* algorithm, but what they do is to ...
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Has there been any neuroscientific study of polydactyly?

I have been reading about polydactyly and found that surgery is only necessary in certain cases. It depends on way the extra digit on the hand or foot is attached. For example, central polydactyly (...
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1answer
266 views

Are neural adaptation and drug tolerance to psychoactive drugs related?

Neural adaptation is "...a change over time in the responsiveness of the sensory system to a constant stimulus". The example given is placing your hand on the surface of a table. Eventually, you no ...
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1answer
39 views

What is a sensorimotor connection in plain English?

I have googled, but haven't found any definition simple enough that I understand. I would appreciate it if you could give me an example as well! Thanks, Jack
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1answer
215 views

Is there a Big Five personality assessment under an open-commercial license?

I am currently working on a project with a few students. It's an app that can test the big 5 personality test. The problem is, I am having trouble finding one that is under an open license and that we ...
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16 views

Supposed 'brain training' [duplicate]

The term brain training is nothing new, however how effective is the 'N-back' method, does this work scientifically speaking? There are mixed reviews on this: one claiming it works https://www....
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1answer
17 views

Typical and minimum voxel sizes for various field strength MRI machines?

Hoping somebody can give me some real world numbers on the typical capabilities of 3T and 7T MRI machines in terms of there minimum voxel size (specifically in relation to there use in fMRI studies if ...
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2answers
92 views

Are the images in our heads physical?

I can think of a banana in my mind, and I can see it, it's there, but it's not really there at the same time. It doesn't feel physical, but for me to be able to see it, it must be physical, right? Are ...
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1answer
39 views

Is doubting a claim more taxing in terms of energy spent by the brain?

I was at a conference some time ago in a university near my city, a Neurologist was part of the various talks held there, and in his words: "There is a, let's call it Neuro-Psychologic ...
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1answer
8k views

What structures in the brain are called upon to strengthen coupling between bilateral movements?

It is very difficult for the normally-coordinated person to be able to pat his/her head and rub his/her stomach at the same time (or pick a similar activity). It seems to be possible to maintain the ...
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1answer
137 views

What sources of randomness does the brain use for sampling?

As an applied mathematician, I have a growing interest in the mechanisms for uncertainty representation and computation in the human brain. In fact, I recently compiled a list of papers on this ...
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57 views

Are there any psychological studies of thirst following food that account for SFO-Nos1 activity?

Some studies up to 2015 surprising found that salty vs. non-salty food doesn't make much difference to thirst. E.g. a 2015 study found that: However, according to Prof. Leshem, despite our gut ...
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2answers
897 views

Why do we have so many wishes and desires?

Two years ago I started to learn (as self-education) evolution theory and neurobiology for to understand - who we are and where we came from? Now I see clearly that we are our brains, which are the ...
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16 views

Is there a structural difference between Nerve cells in the Somatic and Autonomic Nervous Systems

Do the actual nerve cells in the Somatic and Autonomic Nervous Systems have a different structure or chemical make up or are they the same thing just separate systems?
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1answer
23 views

Assuming a neuron does not reach activation, what is the rate of repolarization in the absence of new stimulus?

How long does it take for a neuron to return to it's resting state, due to absence of further stimulus?
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2answers
775 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 ...
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1answer
184 views

Is there a mindfulness meditation technique that tends to produce gamma rhythms in the brain (and not just the alpha frequencies that are typical)?

This is a follow up to a paper (^) that was cited in a response to one of my past questions here. It was found that experienced Buddhist monks generate a substantial increase in gamma waves on demand ...
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1answer
70 views

Are there ways to accelerate the recovery from depression via novel pharmacological antidepressants?

Are there any scientists making substantial progress in the development of far more effective antidepressants? Are there any groups of people interested in developing antidepressants based on genetic ...
3
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1answer
138 views

Clear definition of ego

Is there a clear definition of the ego which is accepted by the neuroscientific community? I have seen a previous post (What do id, ego and super-ego exactly mean?) but this definition is for the ...
3
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1answer
86 views

Can signals from the prefrontal cortex alone trigger a readiness potential in the pre-supplementary motor area?

Background In Haggard, Patrick. "Human volition: towards a neuroscience of will." Nature Reviews Neuroscience 9.12 (2008): 934., the author states in the caption of Figure 1 (pg. 4): The ...
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2answers
66 views

Simulating Hudgkin Huxley neural network

I'm starting work on a computational neuroscience project where I want to create my own model of a spiking Hodgkin-Huxley neuron and connect many instances (about 400) of this model through synapses. ...
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6answers
47k 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 ...
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4answers
72 views

Difference between Psychology & Neuroscience in lay man terms?

I am electronics engineer by profession But i am confused in difference between Psychology & Neuroscience? Please explain in lay man terms?
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40 views

Which neurodevelopmental disorders constitute learning disabilities?

I am actually looking at DSM-5 but I cannot find any exhaustive or otherwise comprehensive list or explicit association of which neurodevelopmental disorders are also learning disabilities.
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31 views

Is there any empirical support to “chemical imbalance theory” for mental illness?

Has it been proved by measurement of chemicals in the brain that psychiatric disorders have either their origin or continuance due to chemical imbalance in the brain? I saw the documentary Diagnostic &...
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1answer
69 views

Is the visual cortex of a newborn baby immediately capable of object detection or is this skill learned over time, and if so, how?

Is the visual cortex of newborn babies right off the bat capable of making sense of raw visual data, for instance, converting the constant stream of raw RGB images perceived by the eyes into a ...
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2answers
281 views

Predictive Experiments on Neuroscience of Free Will

It seems to be very interesting that we can use modern neuroscience and cognitive science research to inform us about the ages-old question of free-will vs. determinism. The standard experiment was ...
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1answer
40 views

Voltage Clamp Method

I don't understand some points of the voltage clamp method. In the resting state, Command voltage and membrane potential are both -65mv. If the command voltage increases to 0mv, current is injected ...

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