The study of the structure and function of the nervous system and its components.

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Nervous system : Nerve signals [duplicate]

If the electrical signals from all the various organs throughout the body eventually connect to the nerves in the spinal column traveling up to the brain, how does the brain differentiate the ...
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50 views

Is there a scientific name for the field of study focusing on the hemispheres of the brain and their control of opposite sides of the body?

I'm assuming this field of study would focus on motor controls, movement, and exercise, but it could also focus on activities which strengthen the corpus callosum or stimulate a specific half of the ...
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75 views

Evolution, self organization and neuroscience

I have rudimentary knowledge of evolution, and biology in general, so bear with me if this question is a bit naive. Let's say we have a particular trait, like highly sensitive peripheral vision. ...
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167 views

If people with colorblindness lack one type of cone cells, shouldn't they be unable to recognize one particular color?

The 3 types of cone cells in normal humans allow them to view 3 types of colors and any color made from mixing and matching those 3. So, 2 types of cone cells should only allow to view just 2 types ...
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152 views

Is Nerve Growth Factor (NGF) commercially available?

I'm curious if NGF, or Neurotrophins in general is available commercially. Can I order it online? If not, what are the medical/biological reasons. Does it breakdown quickly after synthesis/capture? Is ...
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372 views

How different is an introverts brain different from an extroverts?

How is an introverts brain wired differently than an extroverts? Just to give you an example. On an average, the processing that goes on in an introverts brain is greater than in an extroverts ...
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122 views

Inverse of dopamine reuptake inhibitor?

The wikipedia article on the dopamine transporter gives examples of some drugs whose effects are mediated by the inhibition of the dopamine transporter, such as cocaine and amphetamines. Are there ...
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33 views

Could silicon oil block Na+ ion channels in the membrane of an axon and prevent Na+ influx?

Could silicon oil block Na+ ion channels in the membrane of an axon and prevent Na+ influx? I have been wondering if Na+ influx could have been a diluting factor in anterograde fills. If so, could ...
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2k views

How do dopamine agonists like amphetamine/methylphenidate affect acetylcholine signalling?

Do they increase it, or is the effect mostly neutral?
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36 views

Is the motor cortex identical to the sensorimotor cortex?

As far as I understand, the primary motor cortex (M1) and primary sensorimotor (SM1) are notations for the same cortical area in the brain. Am I right that there is no dedicated motor cortex, and that ...
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33 views

Is Norepinephrine beta2 adrenomimetic?

I know that it has alpha1, alpha2 and beta1 effects. It has beta2 receptor where epinephrine can effect. However, to say that it is beta adrenomimetic, I am not sure. That is ligand binding beta2 ...
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28 views

What controls gut motility?

I have two different papers. One claims that gut motility is reduced by stimulation of the Opioid κ and δ receptors. The receptors are activated by Morphine and certain derivatives, specifically ...
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46 views

What could cause no pain but sense of touch?

What could cause a mammal to have and respond to a sense of touch with only isolated numbness but not feel pain?
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Simultaneously using both hands - How does that work?

Is some part in one hemisphere the decision maker and "calling the shots" - controlling the opposite side's hand "directly" and controlling its own side's hand through the corpus callosum. Or: is ...
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61 views

Fastest and slowest action potential

When our instructor asked us about the speed of action potentials in cells, I told him that action potentials and two-wheelers travels at similar speeds. He thought that this is an 'interesting' way ...
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94 views

Relationship between action potentials and EEG recordings

It is possible that I am overthinking this but I have difficulties relating the neural activation to the amplitude and frequency of EEG recordings. For example; if at the EEG location P3/P4 we ...
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42 views

Neurology: spinal tract

I have had a few difficulties finding answers for the questions below. I have tried answering the first two myself; but, I am not sure they are correct or not. And I am not too sure about the third ...
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52 views

Nervous system: Pain and Pleasure?

If you have a constant pain in your body, why does a greater pain or pleasure make you not feel the original pain?
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120 views

Studying the fruitfly nervous system

I'm studying Neuroscience and Fruit Flies are a pretty big deal but I don't know as much as I think I should about them. Are there and comprehensive sources that I could read? I'd like a review of ...
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102 views

What in neurons and their connections changes during the process of learning?

I'm not sure if this question belongs more in physics or biology (or maybe even computer science)... but biology seemed to fit more. What changes in the state of our brains when we learn things? ...
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70 views

Radial Basis Function Network (RBF Network)

In the Wikipedia article on radial basis function network, I didn't understand what was meant by "center vector for neuron i", in other words "center of the RBF units called also prototype".
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973 views

What is the physiological difference between snorting/swallowing cocaine

I know that mucosa inside the nose absorbs cocaine molecules when snorting cocaine, but what difference is there compared to swallowing? Also more cocaine administration equals more cocaine molecules ...
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80 views

Eye Brain Mapping

If our eyes are separated by some kind of full proof barrier/isolation, is it possible that our brain can picture/visualize two different pictures at a time? How the brain will function in this ...
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139 views

Do nerve cells cause action potential in cardiac muscle?

I think the answer is no, but I am not 100% sure. If it was yes, then the dendrite of the nerve cell should each time receive a stimulus causing Na+ channels to open, when the contraction happen. ...
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154 views

How do axon terminals report to the soma?

It is important to bear in mind that the distance between a neuron's axon terminal and its soma can be extensive, up to about 1m in the human body. The fastest transport along the axon is 400mm/day ...
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55 views

Are there any neurotransmitters that trigger all neurons?

I'm reading into the basics of the nervous system, and am intrigued by neurotransmitters. I understand that certain neurotransmitters can trigger more than one neuron type, and may be used as ...
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2k views

Serotonin - Does being aroused make you sleepy?

My Psychology text book says Serotonin causes "Sleep, arousal levels and emotion" Does this really mean that when you are being aroused, Serotonin is released, which in turn makes you sleepy? If so, ...
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226 views

What is the biochemical reason for mental fatigue?

Is it known exactly why the brain needs sleep? What's dropping low / going high when we experience mental fatigue? I can see why low glucose could result in mental fatigue, are other reasons known?
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What are the positive and negative effects of insulin on cognitive function?

A UCLA study seems to imply that insulin interferes with cognitive function. The DHA-deprived rats also developed signs of resistance to insulin, a hormone that controls blood sugar and ...
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41 views

Do both Carbamazepinum and Lamotriginum increase glutamate threshold?

I have in my notes that: Carbamazepinum increases threshold for glutamate Lamotriginum delays release of glutamic acid I would like to simplify these sentences into a single line. I would like to ...
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classical conditioning paradigm for hippocampal learning

I wanted to know what a suitable classical conditioning experiment would be to analyze learning and memory capabilities in rodent models with respect to hippocampal long-term potentiation. For ...
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49 views

Why can we control our breath rate but not our heart rate? [closed]

Even though we cannot survive for more than few minutes if we stop breathing or if our heart stops, why is it so that our heart beat is controlled involuntarily while breathing can be voluntarily ...
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24 views

Regarding cryonics, why can't you freeze a living body and then thaw it later, fully functional?

Cryonics is very popular in science fiction today, as a method of preserving animals, including humans, for long time storage and thawing the tissue later in the future. What is the difficulties with ...
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40 views

Further progression with neuroscience education [closed]

Question for you I hope this is in the right area and all if not please advise on where to put it, Having taken biological neuroscience for a year now as a masters program I feel like I want to go ...
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26 views

Immediate Early Genes during sleep

In Neuroscience 3rd ed by Bear et al. on page 607, immediate early genes are described as related to changing synaptic strength, yet have decreased expression during sleep. The explanation given is ...
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Neuron Growth and Regeneration

Are nerves and/or neurons able to grow and repair after damage, but not regenerate? Is this specific to humans? I have heard of people being paralyzed, but after much therapy are able to use their ...
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What keeps resting potential of neurons constant at -70mV?

I know the sodium-potassium pump pumps out 3 Na+ ions and pumps in 2 K+ ions per reaction so the negative charge in the axon increases. However, once the voltage (difference of charge inside and ...
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27 views

Systematic anticoagulant injection after a CVA

Since most of the cerebrovascular accident are ischemic ones, would it be usefull to have anticoagulant everywhere (we already have AEDs everywhere) so that everytime someone would have symptoms of a ...
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26 views

How is saltatory conduction faster than conduction of unmyelinated fibers? [duplicate]

It's always the same explanation that currents are able to "hop" along Ranvier nodes instead of passing continuously along the axon making saltatory conduction more efficient than continuous ...
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59 views

Does pain scale with mammal mass?

Some biological features scale with the animal mass (see previous Q&A). Assuming the same concentration of nociceptors on the skin surface, I'm wondering how painful a 1 cm wound will be ...
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253 views

Does brain activity generate heat gradients in the brain?

I'm reading this article on guiding axon growth using temperature gradient, and it mentions that the trajectory of growth of neuron connections can be influenced by temperature gradients as little as ...
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90 views

Does the Parasympathetic Tract of Colon Sigmoideum Travel with Nervus Vagus and its Nucleus Dorsalis Nervi Vagi?

I have the following tractus now: nucleus parasymphaticus sacrales -> nervus splanchnic -> ganglion terminalis -> colon sigmoideum The tract is parasympathetic. It suggests me that it should ...
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509 views

Does one neurotransmitter travel all the way through the nervous system?

Nerve impulses of course go really fast, but the neurotransmitters have to travel through millions of nerves, so how can it go that fast? Is it a sort of relay with lots of neurotransmitters taking ...
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309 views

Least painful way to die

There is a lot of talk about inhumane treatment of animals and how we don't kill them in the proper way. I wonder how much research is done on this subject. What is the overall least painful way for ...
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133 views

Chills down the spine with certain music?

I am sure many of us know the feeling of that tingling chill down our spines when listening to certain music. I experienced this most when my younger brother played an emotional piano piece for a ...
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2answers
104 views

Can you disconnect sensation from the brain without destroying muscle functions?

I want to know if it would be possible for a surgeon to "shut off" a person's senses without causing paralysis of any kind. The person would have to maintain their ability to speak and move, but not ...
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82 views

What is accumulation and release centre of neurohormones?

What is accumulation and release centre of neurohormones? Is it hypothalamus?
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151 views

Systemic sensory confusion?

Sometimes when a person gets touched on one part of the body they feel it else where and may think it came from a different part of the body. What causes this? Other examples are similar to why you ...
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2answers
178 views

Epinephrine vs. Adrenaline

Both names are widely used, with what appears to me as a slight prevalence of “epinephrine” in scientific literature and an overwhelming prevalence of “adrenaline” in popular media. Are there any ...
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27 views

Is it a medical condition to not able to recall the word in a language while having a conversation [closed]

While having a conversation it happens to some peopl that clearly they know there exists a perfect word to be used but can not recall it during the conversation in real time and hence forced to use ...