Questions tagged [theoretical-neuroscience]

For questions about mathematical and computational neuroscience.

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23 views

Minimum constant neuron firing rate

Please forgive what may be an elementary question for many of you. I am trying to understand the range of firing rates in an idealized neuron. I understand what governs the maximum firing rate of a ...
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126 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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Influence of LIP on visual cortex

I understand that the lateral intraparietal cortex (LIP) maps various features of targets onto an eye-centric reference frame. I also know that this mapping predicts where visual attention (in the ...
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225 views

What is the limitation of Biosocial Theory developed by Linehan?

Linehan's biosocial theory takes into consideration of the accumulation effect of a stress on individuals, which the Diathesis-stress model could not explain. A predisposition (diathesis) with stress ...
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161 views

Differences between the many versions of neuromorphic hardware [closed]

There is a ton of neuromorhpic hardware being pumped out these days. Off the top of my head, I can name IBM (BlueGene and TrueNorth), Qualcomm, Neurogrid, Brainstorm (Neurogrid 2.0), Spinnaker, (...
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1answer
251 views

How to compute weights and bias for a McCulloch-Pitts neuron?

I am trying to learn how to manipulate McCulloch-Pitts neurons in order to determine their weights and bias based off of inputs. In this example I have inputs: x, y, z ∈ {−1,1} The neuron's output ...
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2answers
211 views

Brain and General Sections

Whereabouts in the brain gets triggered/switched on when an addictive substance is ingested/taken. I'm doing an addiction study with a couple of colleagues and would like some help with it.
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2answers
113 views

What leaps in technology would be needed to scan the total state of the human brain? [closed]

What technological leaps would be necessary to capture the absolute state of the brain? This would need to include: a representation of each neuron a representation of each neural connection the ...
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3answers
87 views

When does the brain 'switch on'? [closed]

I am pursuing Computational Neuro-Science and learning about human Brain. After some reading I got this doubt that when does the brain actually gets switched on? Does it happen right in the mother's ...
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2answers
174 views

Good neuroscience research blogs

In the field of AI research there are really good research blogs that regularly analyse methods and review papers. Examples that come to mind are: BAIR blog: The Berkeley AI Research blog Distill: an ...
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1answer
25 views

MEG from simulated neurons

Given MEG is an approximation of neuronal spiking, are there any models that associate the spiking of simulated neurons to an MEG signal? Ideally, this would be a model with some amount of behaviour (...
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1answer
38 views

Name of association phenomenon

What is the name of the problem to explain how the neural activation for "red circle and a blue triangle" is different from "blue circle and red triangle"? Just activating the neurons for "red", "blue"...
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2answers
31 views

Generate fMRI from neurotransmitter consumption

As mentioned in this answer, it's possible to generate an fMRI BOLD signal from neurotransmitter consumption. What equation would be appropriate for this use?
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128 views

Reference request in Circuit and Signals for Computational Neuroscience

In the area of computational neuroscience, there are basic theories from electric circuits and signal processing to be applied. For background study, which reference will be more suitable ? ...
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1answer
127 views

What are ways to explore metamathematics from a cognitive science/neuroscience lens?

What are ways to explore metamathematics from a cognitive science/neuroscience lens to understand the evolution of mathematics based on structural and perceptual processing biases introduced due to ...
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1answer
26 views

In Integrate-and-fire models, why can we assume spike arrivals to be random?

I'm reading through some notes on integrate and fire models and it says that we assume that spike arrivals are random. Why exactly can we make this assumption? Is it because experiments haven't ...
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1answer
49 views

What are the top contributions from neuroscience to AI and viceversa? How much progress has been made from the interaction between these two fields?

What are the top contributions from neuroscience to artificial intelligence and viceversa? How much progress has been made from the interaction between these two fields? Is there a formal research ...
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2answers
130 views

Understanding neuronal firing in the context of Spike Timing Dependent Plasticity

When discussing Spike Timing Dependent Plasticity in neurons, when we say that a neuron fires do we mean it fires only one spike? Or do we still say "the neuron has fired" when a train of n spikes was ...
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1answer
356 views

How do thoughts work at the neuron level?

How does thought work at the biological level of individual neurons? I believe there are many neurons which are active in the brain at the same time. For example, our senses are constantly taking in ...
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1answer
28 views

Are cycles possible in circuits of neurons? [duplicate]

If we consider neurons nodes and connections between them edges, are cycles (from graph theory) are possible in the brain? To put it another way, would the signal generated from ...
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1answer
85 views

Is there a central collection of information about the often called right brain phenomena? [closed]

There are mental states that some have termed right brain e.g. "Drawing on the right side of the brain" but which may be incorrectly described. Is there a site that specializes in information on ...
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1answer
45 views

How does the brain encode order of information in sentences/stories?

When memorizing a sentence or a full story: then, how does the brain encode the order of the words of the sentence or the sentences in the story?
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0answers
25 views

Testing Multilayer Perceptron [closed]

The following script is from Trappenberg's Fundamentals of Computational Neuroscience and is used to test a perceptron's robustness against noise. However, how would one alter it to test the output ...
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0answers
110 views

How does a brain without sensory inputs function? [closed]

If for some reasons a brain would be deprived off all inputs, it (he/she) would still have memories to process and all thoughts would be based on past experiences. But in case a person was born ...
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30 views

Timeframe in which thoughts are concieved [closed]

Are thoughts concieved in realtime or are they preprocessed chains ready to be thought or both (depending on the prospective) or am I asking a too generalized question to have any sense ?
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43 views

Why we construct and estimate human brain models? [closed]

Based on clinical data collected using different brain imaging, researchers build a mathematical model of the activity of the human brain like the hemodynamic model (Friston, 2000) that describes the ...
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0answers
78 views

Hypothetical working and function of grandmother cells [closed]

I wonder, if the following model of the working and function of hypothetical grandmother cells is worthy of consideration or not (or if it is even a common view, just differently stated). I assume ...
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68 views

What's the relation between PES and LSA?

In "Learning by stimulation avoidance: A principle to control spiking neural networks dynamics" by Sinpayen et al. a learning rule called Learning by Stimulation Avoidance (LSA) is presented. ...
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34 views

How to connect two networks in NEURON software? [closed]

So my goal is to connect STN and SNc neurons by giving synaptic weights and then see the response. I have already modelled STN and SNc separately and observed their response. I need help with the ...
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69 views

How is “one-shot learning” implemented in the NEF/SPA?

In various cognitive modelling publications, "One-Shot Learning", which is just learning given very few examples, is praised as being an essential part of human cognition. For example, in "One-Shot ...
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35 views

Difference between GALIS and NEF/SPA?

The Gated Attractors Learning Instruction Sequences (GALIS) framework, used to solve a card-matching task, as well as the n-back task, appears to be trying to unite high-level symbolic reasoning to ...
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24 views

Creating non-linear neuron model from linear and actual rates

In "Theoretical Neuroscience" by Dayan and Abbott, section 2.2 "Estimating Firing Rates", it describes how by using a linear model in combination with averaged experimental firing rates you can ...
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59 views

How are Bayesian models implemented in the NEF?

One of the much documented problems of Bayesian approaches to cognitive modeling is that there isn't much of a neural grounding. The NEF can be used to compute probabilistic computations with ease (...
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63 views

Is it necessary to read signals and systems before statistical signal processing/ detection theory [closed]

For one who is interested in computational neuroscience and brain computer interface, in university curriculum (e.g. BCCN Berlin), it requires a course in statistical signal processing / signal ...
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1answer
87 views

What subjects to study in order to prepare for a research career in theoretical neuroscience?

Which topics in a dual degree in Cognitive science and Computer science at the graduate level or systems neuroscience (experimental + theory) graduate degree will better prepare for a research career ...
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2answers
283 views

As for future mind control/reading technology, can humans fight it?

As of recent times, rats have communicated through wireless brain implants, from across the globe. Also, recent fMRI technologies have allowed prediction of movements (or intention), and the ...
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1answer
49 views

Energy supply to brain

I wonder if the energy delivered to brain per unit time to maintain brain processes is limited and fairly constant? Is all provided energy fully used?
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1answer
95 views

What is an example of a learning machine that achieves zero variance?

I'm attempting to find an example of a learning machine/neural network that achieves zero variance, but I am having a hard time finding an example anywhere. Variance is defined as the generalization ...
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1answer
21 views

Theoretical Neuroscience: what tools are in your mathematical toolkit?

I believe that the following courses are a minimum math/engineering/(+cs) requirement for theoretical neuroscience research, specifically, Eliasmith's NEF/SPA approach. I wonder what other tools might ...
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1answer
35 views

Methods to find patterns or correlations in MEA spike trains

I am looking for methods currently used to analyze micro-electrode arrays spike trains and figure out patterns, as repeated sequences of activation or spacial correlations. I know about ISI ...
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1answer
53 views

Neuronal differences of linguistic statements [closed]

Assuming that the brain (structure) is only constructed using neurons and synapses, then what is the difference between the following linguistic statements from a 'mechanical point of view'? Bob is a ...
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11 views

Surgical implications of a fallacy in infering histology and morphology through a 1.5 Tesla MRI of a brainstem tumor

What would the surgical implications of a fallacy in infering histology and morphology of a brainstem tumour be? I am interested mainly in the sequelae in the sensory, motor and cognitive functions. ...
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20 views

Have “Sapir-Whorf sensitivity” and “differential neuroplasticity” been considered so far?

I watched the movie "Arrival" today and came to define the concept of "Sapir-Whorf sensitivity" as the measure of to what extent is the way of thinking of somebody influenced by the languages they ...
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37 views

How does a brain learn strategies?

Imagine the simple task of finding words in a wordsearch. Initially the default strategy might be just to let your eyes wander around to see if you spot any words. Strategy 2 might be to search for ...
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1answer
17 views

Neuroanatomical mapping of production compilation

ACT-R and Spaun map their production rule system onto the the basal ganglia and thalamus. However, I haven't been able to find how ACT-R maps production rule compilation onto the basal ganglia or ...
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1answer
79 views

Prerequisite Request: Neurorobotics [closed]

For the newly emerging field, Neurorobotics. Can one list several highly recommended prerequisite courses prior to entering this field ? Except for classical machine learning, computational ...
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2answers
134 views

Human brain v/s computer: speed comparison?

We can't compute (speaking of some of the functions a computer can perform ) as fast as a computer. Where does this shortcoming stem from- working memory or clock frequency perhaps comparable to the ...
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1answer
28 views

Does anybody know a source having multi-electrode (several channels) recorded data of multiple Neurons (I prefer real data not artificial)?

I mean recorded data of multiple Neurons with multi-electrode. I need this data as the input for my experiment.

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