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

learn more… | top users | synonyms (1)

1
vote
1answer
52 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
63 views

Is it possible for neurons themselves to manifest cancerous behavior?

From what I understand, one form of cancer is a faulty gene responsible for the programmed death of a cell. Not long ago, popular wisdom used to say neurons don't regenerate. However that is no ...
0
votes
1answer
106 views

Mechanism of antiperistalsis

What is the mechanism of antiperistalsis that occurs during vomiting? Why the peristaltic waves normally don't propagate in anal to oral direction? Please give logical explanation with authentic ...
2
votes
1answer
73 views

Do insomniacs yawn?

According to wikipedia, the jury is still out on the function a yawn serves. The article referenced above however writes to say Yawning most often occurs in adults immediately before and after ...
2
votes
0answers
58 views

What causes headaches (biologically)? What does it mean directly? [closed]

Even though your brain can't feel pain, thingies in your head are installed to compensate for that. Once I thought your head starts to hurt when your brain is tired. I can't believe this any more. ...
3
votes
2answers
152 views

How is information sent from limbs to the brain exactly?

Say you have a needle, and you poke a very specific area on your left thumb. A signal gets sent from that nerve up your spine and into your brain. How does the brain know exactly where this signal ...
1
vote
1answer
87 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 ...
3
votes
1answer
271 views

Where do butterflies sleep?

Do butterflies (insects) sleep, and if so, where?? I have googled for information but didn't get an exact answer.
2
votes
2answers
113 views

Do people with colorblindness have less cones or no cones of a certain type?

https://en.wikipedia.org/wiki/Color_blindness#Red.E2.80.93green_color_blindness Protanopia (1% of males): Lacking the long-wavelength sensitive retinal cones, Deuteranopia (1% of males): ...
2
votes
2answers
84 views

Resting and action membrane potential..?

In the resting membrane potential of neurons the inside of membrane is kept negative and outside of membrane is kept positive by the utilization of energy through Na-K Atpase pump, While during action ...
10
votes
1answer
200 views

What would be the conduction speed of A-alpha fibers, were they unmyelinated?

It's known (Hursh 1939) that myelinated axons exhibit the behavior $v = 6d$, where $v$ is the propagation speed [m/s] and $d$ is the axon diameter [μm]. A related relation for unmyelinated axons is ...
3
votes
1answer
67 views

Biological advantage of electric synapses

Electric synapses are synapses that do not process information but simply foward one action potential from one neuron to the next. There are no neurotransmitters, no inhibitory and exitatory ...
2
votes
1answer
83 views

Exercise vs stimulants, which is more effective for promoting concentration?

Stimulants are the first choice for treating ADHD. But we also know that exercise helps to improve concentration. We know that both stimulants and exercise increase bloodflow to muscles and to the ...
2
votes
1answer
37 views

The use of proteins in memory creation

I have very limited knowledge of how the human memory works as I think, at this time, most people do. However, I have been reading and some articles which say, and I quote the article just linked ...
3
votes
1answer
125 views

dopamine paradox in Schizophrenia

If there is more dopamine action in the mesocortical pathway in Schizophrenia, then the patients should always be in euphoric state. But instead patient lacks motivation and don't want pleasure. Why?
1
vote
1answer
42 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 ...
7
votes
1answer
568 views

Why does it hurt more when you touch a nerve directly?

I am not a biologist nor know much about biology (so please explain in layman's terms) however I have always been curious as to why this is. What causes the difference in pain between touching an ...
1
vote
2answers
57 views

What do nerves have to do with feeling nervous?

I was thinking about how when people say: "Nerve cells don't regenerate" (which is, apparently, not true at least for some kinds of nerves) and "You're making me nervous" they might not refer to the ...
14
votes
2answers
2k views

What causes REM atonia to be lost in sleepwalking?

I understand that in normal REM sleep the voluntary muscles are in effect paralysed in order to prevent an individual acting out their dreams. This paper indicates that there are likley to be ...
14
votes
2answers
338 views

Can parts of a human brain be asleep independently of each other, or vary in the times required for them to fall asleep?

I know that some birds and marine animals can continue complicated activity (swimming, flying?) while one hemisphere of their brain is asleep. I'm interested if human brain has some parts of it that ...
5
votes
3answers
193 views

Can children restore brain cells?

By "children" I mean young people at the age of 10 or lower. I know that the adult brain cannot restore brain cells, but what about children? I mean, the brain must develop from a few cells to a 90 ...
1
vote
1answer
35 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 ...
2
votes
1answer
101 views

Solubility of Forskolin in ethanol

I am interested in using forskolin in cell culture medium. Does anyone know how to make solution of 10 microM forskolin in 5% ethanol or less. I would like to avoid using DMSO as a solvent. Thank you. ...
2
votes
2answers
104 views

Thoughts precede neuron firing or vise-verse?

I am at the verge of submitting a paper on 'scientific explanation of reality' to an international philosophy body. First submitted draft was returned by the evaluation expert, asking me to re-submit ...
0
votes
1answer
54 views

What is accumulation and release centre of neurohormones?

What is accumulation and release centre of neurohormones? Is it hypothalamus?
6
votes
1answer
134 views

Task-dependent “reversed” handedness: why use left hand for some tasks? How is it controlled by the brain?

I am right-handed. Which means that when I hammer down a nail, I hold the nail in my left hand, with which I can hold it straight and at a controlled position. This is true in situations where the ...
3
votes
1answer
212 views

Will neurons live after the death of a human? If so, how long?

I don't know if this is correct or not, but I have heard this from a friend and I want to get a clear explanation about this.I hope there is some one who can help me.
6
votes
1answer
294 views

Why is membrane potential not zero at equilibrium?

For the squid giant axon, the membrane potential computed by the Goldman equation is -60mV. And the Nernst potentials are (the differences between the K+ and the Na+'s Nernst potential and the ...
2
votes
1answer
81 views

Why do the neuron pathways decussate?

I learn about the brain right now, and there are crossing of neuron pathways everywhere; in the thalamus, the medulla oblongata, the pyramidal tract... And I don't understand why? What is the reason ...
2
votes
1answer
74 views

What is the energy consumption of the brain?

What is the energy consumption of the brain, and is there a difference in consumption when waking and sleeping?
1
vote
1answer
112 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
37 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
49 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
37 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?
2
votes
1answer
40 views

What's the best way to measure/calculate the size of a light beam at the sample of a microscope?

I am using a microscope with an LED derived light through the epi-fluorescent port of a microscope. I know that the "field of view" for a given objective is equal to the field number/magnification ...
3
votes
3answers
321 views

How is propagation of action potentials terminated once the “message” has been sent/received?

I'm thinking about neurons in the brain that are used for "thinking". As I read about action potentials, I see that an Axon is connected to a Dendrite of a neighboring cell and that there are ...
5
votes
1answer
184 views

What causes Paresthesia (Pins and Needles) at a cellular level?

I've looked it up in plenty of places like the Wikipedia page and such, and it is clear that the most common cause of Paresthesia is either a fair amount of pressure on a specific patch of skin ...
2
votes
2answers
321 views

Do brain cells shrink during REM sleep or a lucid dream?

In this BBC news article a study shows that during sleep brain cells shrink to open up the gaps between neurons and allow fluid to wash the brain clean. But do the cells shrink and undergo the whole ...
2
votes
1answer
117 views

What is the full name of E. G. Gray?

E. G. Gray is Neuro scientist who found and described first the two major morphologically defined synapse types (Gray Type I (asymmetric) and II (symmetric)) in his work E G Gray (Oct. 1959). ...
0
votes
1answer
51 views

Do's and Don't's of Undergraduate Research? [closed]

I was fortunate enough to get a position as a researcher for the Mayo Clinic's SURF Program this year. My PI's lab focus is on the the immune system's role in CNS axonal and neuronal injury, ...
2
votes
1answer
65 views

What is the creature with the lowest neuron count that demonstrates cognition beyond reflexes?

I'm under the impression that nematode worms just perform the same scripted actions over and over again in response to specific stimuli. They have 302 neurons. Chimpanzees display problem solving ...
3
votes
1answer
179 views

Benefits of CLARITY?

What are the benefits of CLARITY over this technique that was published more than a year earlier? Of course the second technique needs a fancier microscope that is likely more expensive and requires ...
1
vote
1answer
46 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 ...
0
votes
1answer
70 views

M-type potassium channels by muscarinic receptors

How does the closure of M-type potassium channels by muscarinic receptors result in increased excitation of the target neuron?
0
votes
2answers
128 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 ...
3
votes
2answers
234 views

How does the brain know where a signal came from? What is the addressing system

I am an electronic engineer so I am thinking about this from an electronics outlook. How does the addressing system work, As I see it, the nervous system is small parallel branches attached to larger ...
0
votes
2answers
128 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 ...
0
votes
1answer
51 views

How do neurons send electric pulses even though they are surrounded by liquid which is mostly water?

I just thought about the fact that people move through electrical pulses traveling through neurons in the brain and muscles through the body. Here is what i know: the body is full of 97 or more, ...
4
votes
1answer
153 views

Does playing music during sleep actually suppress rather than rouse the brain?

I've long been interested in the effect of music/sound on dreaming, and even built 2 apps that play music during REM period. Now I'm looking at this article about FMRI studies of a sleeping brain, and ...
1
vote
1answer
73 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. ...