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

learn more… | top users | synonyms (1)

1
vote
1answer
55 views

Does sympathetic nervous system acts bilaterally for pupil dilation or other two sided organs?

The question might seem weird. Does sympathetic nervous system acts 'bilaterally' meaning if you shout to a person's left ear a loud noise (e.g. by headphones), will it activate sympathetic system ...
1
vote
3answers
87 views

Are there “multi-frequency” signals within a human brain?

I know that neurons can exhibit tonic and phasic firing, and also that a neuron is sometimes called an integrator. This makes me interested to know if there are activities in the brain that depend on ...
1
vote
1answer
26 views

Is the brain functionally symmetrical?

I understand that each half of the human brain handles different parts of our thinking. Left brain, right brain, that whole topic. But in pictures, the brain is always depicted as having symmetrical ...
1
vote
1answer
82 views

Alpha wave frequency variance in EEG of single subject over period of a few hours?

I have an Emotiv EPOC (EEG headset: 128 SPS, notch filter @60 Hz, felt saline contacts) I've been playing around with. Over the course of two or three hours using CCA to plot an SNR contour against ...
1
vote
1answer
693 views

What is 'calcium conductance'?

What is the meaning of calcium conductance in ion channels. I encountered this in the following text: It was established that the µ and δ opioid receptors open potassium channels, which results ...
1
vote
2answers
54 views

Introductory book in genetics? [duplicate]

I am working in the field of neuroscience with a background in computer science. I try to find new ways of analyzing brain imaging data (mostly MRI, EEG, MEG, fMRI) with modern machine learning ...
1
vote
1answer
97 views

Do rare earth metals actually repel sharks? [closed]

Stroud claims that sharks are effectively repelled by the use of rare earth metals in the water. There has even been a patent issued by the same author for rare earth-wrapped fish hooks to reduce the ...
1
vote
1answer
30 views

Can the Hebbian theory apply to Inhibitory Neurons

If I understand the basic Hebbian theory, when a neuron fires a pulse to another neuron and this pulse causes the target neuron to fire then the delta energy sent from the initial neuron to the target ...
1
vote
1answer
31 views

Confusion over role of current/potential in Nervous system?

I am taking a course on the nervous system and I am do not have any physics background. Therefore, I would like to know, what are we precisely talking about when we talk about current in the nervous ...
1
vote
1answer
266 views

Do ants feel pain?

I have watched video on youtube where guy pours molten aluminium into fire ant colony to make casing. In the comments below there's huge discussion on is that a right thing to do. I am on the side ...
1
vote
1answer
55 views

Measurement of glucose concentration in the human brain

If I want to measure the exact glucose concentration in a human brain then how can I proceed to do that? Is there any technique or assay to do that?
1
vote
1answer
41 views

Specifics of decussation

Beginner question here: The definition of decussation I see is the crossing through the midline of a bunch of neurons. But I was wondering if there was a little more to it than this, because I'm ...
1
vote
1answer
39 views

Nervous System : Organ or Gland Failure

If an organ was to start failing, not total failure, such as the thyroid gland, is it possible that the fault may not lie in the failure of the organ but in the nerve signals coming from the brain?
1
vote
1answer
38 views

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 ...
1
vote
1answer
54 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 ...
1
vote
1answer
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. ...
1
vote
1answer
171 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 ...
1
vote
1answer
176 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 ...
1
vote
1answer
382 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 ...
1
vote
2answers
127 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 ...
1
vote
1answer
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 ...
1
vote
1answer
2k views

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

Do they increase it, or is the effect mostly neutral?
1
vote
1answer
40 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 ...
1
vote
1answer
34 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 ...
1
vote
1answer
29 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 ...
1
vote
1answer
48 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?
1
vote
1answer
101 views

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 ...
1
vote
1answer
71 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 ...
1
vote
1answer
99 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 ...
1
vote
1answer
43 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 ...
1
vote
1answer
55 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?
1
vote
1answer
123 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 ...
1
vote
1answer
109 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? ...
1
vote
1answer
71 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".
1
vote
1answer
1k 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 ...
1
vote
1answer
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 ...
1
vote
1answer
142 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. ...
1
vote
1answer
159 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 ...
1
vote
1answer
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 ...
1
vote
1answer
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, ...
1
vote
1answer
234 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?
1
vote
1answer
1k views

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 ...
1
vote
0answers
35 views

How nerves interact with other cells? [closed]

I read in a book by Mick O'Hare, that injuries inflicted by electric current are caused by tension of your muscles. Is that explainable only with physics or nerves really use electrical signal as ...
1
vote
0answers
22 views

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 ...
1
vote
0answers
58 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 ...
1
vote
0answers
25 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 ...
1
vote
0answers
42 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 ...
1
vote
0answers
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 ...
1
vote
1answer
41 views

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 ...
1
vote
0answers
90 views

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 ...