Questions tagged [neurology]

The medical specialty involving the diagnosis and treatment of all categories of disease involving the central, peripheral, and autonomic nervous systems, including their coverings, blood vessels, and all effector tissue, such as muscle.

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Are there any types of cancer that cause neurons to divide?

After birth neurons generally do not divide. But is there any specific type of rare cancer or tumour where neurons divide? And if there is such a cancer, then how is it possible for a neuron to regain ...
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Does loss of dopaminergic neurons totally eliminate voluntary muscular control?

Breathing is a function that is not only autonomic, but can also be temporarily overridden and placed under voluntary control. In fact, you are now breathing manually. Now, suppose that someone has ...
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How do organophosphates actually work?

The common explanation as to what the primary mechanism of action for organophosphates (and carbamates) is is the inhibition of the enzyme acetylcholinesterase and resulting buildup of acetylcholine ...
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How much is the motion speed of calcium ions in ion channels and neurons?

As far as I know, calcium ions moving in a Brownian manner are responsible for the performance of neurons and neuro-transmitters. My question is, how much kinetic energy these calcium ions have and ...
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34 views

What substances can selectively destroy certain cells?

Recently, I've watched a documentary about how, in the 1980s, people were buying and using drugs from the streets and then becoming paralyzed a few days afterwards. The drugs that they were using were ...
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What phosphorylates tau protein & and what causes tau to be phosphorylated?

I want to know what phosphorylates tau protein and its 6 isoforms. I know kinases cause phosphorylation events, and in tau it can be phosphorylated in a healthy neuron in the trans conformation, but ...
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25 views

Can motor neurons in the brain stem start movements?

Supposedly (consciouss) movement is started in the cerebral cortex. But some time ago I've read a research which stated it might be possible some movements (not specified which ones, probably mean ...
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39 views

Do non-human primates have mental disorders like humans?

I was at the zoo today and watched a gorilla pick at a scab on its finger, compulsively, until it started bleeding. Is this OCD or is it just a nervous thing that non-human primates do at the zoo? Do ...
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145 views

Why Is Gray Matter Gray?

When I researched I found different reason for this, the popular ones are 1) white matter is mylinated .this reason was given in reference books and this website while others say 2)cell body ...
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338 views

How spinal cord play its roles in human beings sex? [closed]

I know most people can't enjoy sex if their spinal cord injured. How spinal cord play its roles in human beings sex?
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805 views

What is the specific role of the cerebellum when it comes to 'coordinating movement'?

In elementary biology (high school level in the UK - A levels), we are told that the cerebellum is the part of the brain that 'coordinates movement'. Literally nobody takes the time to explain what ...
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31 views

Are there toxins that cause heart attack and/or stroke in multiple individuals in short time frames?

Are there any known environmental factors that would cause more than one person to have a heart attack or stroke within a short period of time (e.g. 2-3 months) of one another? I'm particularly ...
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102 views

Minimal viable EEG equipment for dissertation research on BCI / BMI

I am planning out a dissertation study of Brain-computer Interface (a.k.a. Brain-machine Interface, BCI, BMI, etc) applications. One of the 3 papers in that dissertation will involve collecting ...
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1answer
104 views

Can cerebrospinal fluid pass through the pia mater or ependymal cells of the ventricles?

During a lecture, a professor commented that the cerebrospinal fluid and interstitial fluid of the brain parenchyma have similar composition because they can exchange with one another. This struck me ...
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27 views

Neurons and nerves [duplicate]

What is a nerve compared to a neuron? Is it a collection of axons alone or does it include cell body too? I'm pretty confused of what actually the "nerve" is composed of. I had imagined that the nerve ...
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What is the cause that angina pectoris is felt in your left arm?

When someone has heart problems sometimes they feel pain in their left arm. But why is the left arm painful?
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33 views

Can nervous disorders be cured? Will enough research be the answer? [closed]

I have searched every nook of the internet and I couldn't find a clear and to-the-point answer. Well my story is that I am a young BSc student who wants to do research on neurological conditions ...
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61 views

Is there still a convincing argument/evidence that adult neurogenesis does not exist/play an essential role in NON-Human Primates?

Adult neurogenesis in human-being is a debated topic, and will probably take several years to get resolved. I am under impression that it is relatively easier to settle the debate on non-human ...
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92 views

Why biologic systems tends to become more complex?

From elements, chemical compounds, cells, multicellular organisms, society evolves and with each step possibilities increase and things get complex. We are builing structures like ribosome builds ...
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1answer
133 views

Can upper motor neuron lesions cause hypotonia?

I have been taught that hypotonia is always caused by lower motor neuron lesions while hypertonia is by upper motor neuron lesions. However, I recently learned of an entity called central hypotonia, ...
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1answer
210 views

Rod and cone photoreceptors are neurons?

i mean the photoreceptors have axon and dendrite and body cell or it is not neuron any more . can we say outer segment of photoreceptor cell is dendrite ? of course these have body cells but i am ...
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1answer
70 views

Are there humans which the brain sends signals to the limbs faster than the average?

I have done some researches on the time taken by the brain to send signals, but I didn't find whether that time is the same amongst all humans or there are some differences, and I have based my ...
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1answer
41 views

Flow diversion for cerebral aneurysms or stabilizing the hemodynamics?

I'm doing research of flow diverter for cerebral aneurysms applications and I'm wondering the reason behind stent placement underneath of cerebral aneurysms is to divert the flow or stabilize the ...
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What is the signal that indicates which neurons Schwann cells should myelinate versus which should remain unmyelinated?

Schwann cells are neuroglial cells that produce myelin in the peripheral nervous system. However, not all axons are myelinated - some will remain unmyelinated. There must be some signal that ...
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1answer
72 views

Why there is no neurovascular drug-eluting stent?

I'm researching on neurovascular stents and I'm wondering why there is not much about drug-eluting neurovascular flow diverters in the literature? I read in an article that it's because of complex ...
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77 views

Why Cerebrospinal fluid is not heated for VDRL?

For performing VDRL of serum , we heat serum to inactivate complement proteins which may otherwise interfere , but why don't we do same for CSF even though it too has complement proteins in it? Is it ...
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620 views

Neuron connectivity- how are they connected physically

If Neurons are only connected through synapse and there is no physical connection, how are they just suspended in brain layers?
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41 views

Is it possible to directly uploaded controlled imagery into a person's conscience?

I was wondering, is it possible to use electrical charges and/or EM waves to induce imagery directly into a person's mind? I got this idea because since almost everybody dreams, and dreams are ...
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is it possible to use electroshock to temporary stop gross motor functions directly on the neural pathway?

Is it possible to modify that procedure and use it to send a small electroshock on the specific neural pathway and temporarily stop that gross motor function? When the microphone detects unwanted ...
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3answers
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How do we know the brain flips images projected on the retina back around?

Why do we turn images upside down again rather than dealing with them directly, still vertically rotated after passing through our lens? I don't see how that would cause any problems, and how we'd ...
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1answer
74 views

How do our eyes see an inverted image? [duplicate]

How exactly do our eyes see an inverted image of what we are looking at? Does it have something to do with the shape of our lens (i.e. convex)?
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1answer
107 views

What parts of the visual system could be responsible for a fixed, monocular scotoma?

Light enters the cornea, crosses the lens, hits the retina. Electric sinal travels from retina through the optic nerve, reaches the chiasma, crosses and makes its way to the visual cortex. My ...
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1answer
32 views

Can we send signals to nerve?

I want to know two things. Can we send a signal to a nerve using external source like electricity? Can we differentiate signals sent from receptors like pain receptors, pressure receptors etc.
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1answer
64 views

What are ECT parameters?

ECT or shock treatment is used to treat psychological disorders. How much voltage, current and duration is used for this? Wikipedia mentions a treatment of 0.8 Ampere for 5 seconds.
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234 views

Why some neurons are tetraploid

Why are some neurons tetraploid, and how does this result from it's ancestor cell ?
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Is brain transplantation possible?

Many organs can be transplanted nowadays, including the liver, lungs and kidneys. Can the brain be transplanted?
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92 views

Is there a type of amnesia that separately affects long-term memory?

Is there a medical condition that affects the long term memory, but leaves the short-term and working memories totally or fairly intact?
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233 views

Would methamphetamine heal wounds, infections, and diseases?

Alright, so this sounds crazy but based on these research findings it is safe to assume that meth would allow wounds and diseases to heal faster by interleukin 6 . On the otherhand, using meth during ...
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1answer
85 views

Are there any known rules that neurons always follow while transmitting/receiving signals?

I'm new to neurobiology so I don't know much about it. However, I have worked on artificial neural networks. Man-made AI networks all follow a handful of simple rules. I was wondering if biological ...
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2answers
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difference between neurotransmitters and hormones

I have been reading a lot about neurotransmitters and hormones but what's the difference between them both or are they the same? It's been confusing for a while now. Also, why do some ...
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259 views

Why do neurons loose the potential to regenerate and reproduce in adult animals?

I have read in several books that neurons in the central nervous system loose the power to regenerate after some developmental stage but why do they? Can we artificially induce regeneration?
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What happens to the brain during meditation?

I've read several experiments on the internet according to which it is possible to reach a psychedelic state without taking any psychedelic drugs like DMT, LSD and other tryptamine derivatives. It ...
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1answer
74 views

Confusion about the construction of the rat's mental map

I'm reading the article "A Topological Paradigm for Hippocampal Spatial Map Formation Using Persistent Homology" by Y. Dabaghian, F. Mémoli, L. Frank, G. Carlsson I try to understand the following ...
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451 views

Hebbian theory “fire together” clarification

Donald Hebb states it as follows: "Let us assume that the persistence or repetition of a reverberatory activity (or "trace") tends to induce lasting cellular changes that add to its stability.… ...
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45 views

Question About the Physiology of Seizures

Absence seizures usually occur in children between ages 4 to 14 (Hopkins Hospital). Spontaneous remission occurs in 65–70% of patients during adolescence (Medicine Central). My question is what ...
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2answers
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Calcium levels and nerve hyperexcitation

Why does lower blood calcium levels (or lower calcium levels in ECF) cause nervous hyperexcitaton? Why does it cause over stimulation of nerves and muscles and spasmic contractions of muscles? This is ...
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1answer
70 views

Why aren't the brains of most advanced life forms in the middle of their bodies? [closed]

This question is designed to be the successor to Why don't most animals have "heads" in the middle of their bodies? The previous question was flawed as it fails to accurately define ...
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1answer
38 views

Implanted neural recording system vs Electroencephalography

Can someone help me to understand why in nowadays the scientists develop implanted neural recording system to measure and collect neural signals? Why the use of the electroencephalogram is not ...
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1answer
49 views

Neurons competing for survival

I was reading in a book that in the process of neurogenesis - when new neurons are born - neurons compete for survival. Or in other words they have to make themselves useful to the brain otherwise ...
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263 views

How long can one go with necrosis?

In general, when a limb dies, how long does it take before it falls off? Can you go years with a black and useless limb, or does it just.. fall off right away?