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11 votes

Is there any health risk in cellular phones?

Exposure to ionizing radiation, such as from x-rays, is known to increase the risk of cancer. However, although many studies have examined the potential health effects of non-ionizing radiation from ...
Refractor's user avatar
  • 139
10 votes
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Can the blood accumulated after stroke be cured?

First of all, I am going to stay quite “general” as I understand you are not from the field. The aim of my post is really to provide some clarifications to your question. There are two types of ...
M. Arrowsmith's user avatar
10 votes

What factors influence the memorization in a young adult?

Memory is a complex cognitive function which relies on several neuronal pathways. Without wanting to go into too much details, the process of memorization is dependent on three different steps: ...
M. Arrowsmith's user avatar
9 votes
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Can thinking too much lead to brain damage?

No A cerebral hemorrhage (also spelled haemorrhage) is a type of intracranial hemorrhage that occurs within the brain tissue. It can be caused by brain trauma, or it can occur spontaneously in ...
John's user avatar
  • 1,104
9 votes
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breathing in versus injecting mercury (the gas)

The problem here is the over-simplified (and inaccurate) idea that Thiomersal = mercury, it's not, rather it is a compound (chemical formula: C9H9HgNaO2S) that has mercury atoms in it's molecules, the ...
motosubatsu's user avatar
  • 1,272
9 votes
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Doesn't Intraventricular Catheter placement damage the brain parenchyma? Is this damage significant? How is it avoided/minimised?

Insertion will cause local damage. The more carefully you look, the more there can be to find - small volume bleeding is more common than larger bleeds, and symptomatic injuries are even more unusual. ...
Michael's user avatar
  • 689
7 votes
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what does this abnormality (arachnoid cyst) mean in a brain MRI?

First of all, your "main question" contains a lot of small other questions, which I think are difficult to answer as we are not your sister's neurologist (we haven't seen the MRI, we haven't examined ...
M. Arrowsmith's user avatar
6 votes
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Looking for studies about how blood pressure changes are perceived by our brain

This study published in 2014 provides an excellent review of the physiological mechanisms of cerebral blood flow regulation (open access): Willie CK et al. Integrative regulation of human brain blood ...
M. Arrowsmith's user avatar
6 votes
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Skin receptors on finger tip

I'll assume you're only asking about mechanoreceptors, else it gets too murky. Humans have four types of mechanoreceptors. Meissner corpuscle, innervated by RA1 (rapidly adapting type 1) nerve ...
rumtscho's user avatar
  • 2,792
5 votes

Which chemicals or drugs cause retrograde amnesia?

First, let's define retrograde amnesia carefully. You'll find many sources listing drugs that cause retrograde amnesia but they're using the term incorrectly. From http://www.human-memory.net/...
Carey Gregory's user avatar
  • 9,813
5 votes
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Does carbon monoxide poisoning make you tired before it kills you?

Does carbon monoxide poisoning make you tired before it kills you? The symptoms of carbon monoxide poisoning can vary per person it affects, and it can also depend on the the levels of exposure to ...
Facebook's user avatar
  • 449
5 votes
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How to keep the brain in an excited state?

What worked for me (and many others!) was exercise. After trying many antidepressants, I tried running. What got me motivated was an old article that I read about a clinical trial done by the ...
Mike Waters's user avatar
5 votes

How do you tell a brain-dead patient from a living one?

Once the decision to proceed with the brain death determination has been made, three conditions must be present: coma, the absence of brainstem reflexes, and apnea. Coma should be evaluated by ...
Narusan's user avatar
  • 6,772
5 votes
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Why do neurostimulators for DBS need to be implanted?

TL;DR: Placing it in the chest or abdomen actually makes perfect sense. There are several reasons why your ideas won't work, at least with current technologies. why not either a) have the pulses be ...
Carey Gregory's user avatar
  • 9,813
5 votes
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Topical local anesthesia affecting the brain

Local anesthetics like lidocaine work by blocking voltage-gated sodium channels; these channels are the biological basis of action potentials and therefore neurotransmission. Exposure to any typical ...
Bryan Krause's user avatar
  • 13.9k
4 votes
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If meditating lowers brain activity and low brain activity is good then how come when you see low brain activities in (brain) PET scans its bad?

Lowered brain activity in a PET scan isn't necessarily bad. It depends on what part of the brain is less active than usually and whether this is a permanent or transient state. Our brains are less ...
YviDe's user avatar
  • 6,982
4 votes

Does sleep irregularity affect my brain and health?

Sleep irregularity In children, values for lower sleep duration were found to be strongly associated with increased metabolic risk. Although obese children did not display radically different ...
pericles316's user avatar
4 votes
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What is the difference between Axon terminal and Synapses

If you have a look at one of the most famous reference book in neuroscience "Principles of neural science" by Kandel (Fifth Edition), on page 22: There is this figure: And here is the description of ...
S.Victor's user avatar
  • 905
4 votes

How good, and for how long, can endorphins really make you feel?

There seems to be a misconception at the driving part of the question. Exercise has more effects (on the brain) than just stimulating a few synapses. That is indeed a vague and vastly incomplete ...
LаngLаngС's user avatar
  • 6,887
4 votes
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What are the functions of these parts of the brain (MRI)?

Three spots in the brain do not automatically mean three different symptoms. Even if those spots are abnormal, they do not necessary cause any damage. A doctor in the "2. MRI report" says there are: ...
Jan's user avatar
  • 15.9k
4 votes
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Is forgetting certain spellings a sign of Alzheimer's?

There are four cognitive symptom categories for Alzheimer's disease: aphasia, amnesia, apraxia, agnosia. These are broad categories that our brains handle somewhat separately. People frequently do ...
KCasper's user avatar
  • 304
4 votes
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Any research on brain's processes involved in evil actions?

When you put it that way... "...a cerebral circuit of evil..." ...no, that is absolutely ridiculous (no offense). In the human body (and generally in nature) there are only physical and ...
Antony's user avatar
  • 424
4 votes

Ringing in ears

Most people describe ringing in ears as tinnitus. From a medical perspective, the definition of tinnitus is a real mess. It is typically described as a symptom and not a disease and diagnosis is often ...
StrongBad's user avatar
  • 1,462
4 votes

Does diffusion MRI (DWI & DTI) measure diffusion or osmosis?

Diffusion of water. Osmosis is movement of water across a membrane due to solute changes. In the case of diffusion tensor MRI, the whole point is that there is more diffusion along the same axis as ...
Bryan Krause's user avatar
  • 13.9k
4 votes
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How often does the organic material of the brain change?

This claim probably derives from back-of-the-envelope calculations for cellular turnover rather than "organic material," and is quite inaccurate since some cells turn over very quickly and others last ...
Bryan Krause's user avatar
  • 13.9k
3 votes
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Healthy way to become numb

These could be symptoms of different medical problems, depression, anxiety, or other issues. In lieu of personal advice or a discussion of treatments, I advise seeing your primary care provider as a ...
DoctorWhom's user avatar
  • 5,804
3 votes

If your brain tells you that you hear ringing in you ears, tininitus, why is it so difficult to tell it to stop?

Interesting research offers a possible explanation as to why, even when exposed to the same external harmful noise stimulus, some individuals will develop tinnitus and other individuals will not. ...
Prince's user avatar
  • 1,888
3 votes

how does alcohol damage the brain?

When drinking alcohol, the small water-soluble ethanol enters the bloodstream and moves around till it reaches the brain. Since it is a small molecule, it enters the blood-brain barrier and passes ...
Lamia Kouba's user avatar
3 votes
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Are there any examples that gave a person new mental abililities after a head injury?

An accident left Derek Amato with a severe concussion and a surprising ability to play the piano. One theory is that his brain reorganized, making accessible existing memories of music. Another is ...
Prince's user avatar
  • 1,888
3 votes

How to keep the brain in an excited state?

Definitely, exercise. Any form. Running is often mentioned because of "runner's high," but I have bad knees so... I walk. I walk with earbuds and listen to my favorite music. I change where I walk and ...
M.Mat's user avatar
  • 131

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