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 ...
- 139
11
votes
Accepted
What is the name of the sense that keeps track of where your body parts are?
This so-called sixth sense is called kinesthesia or proprioception. There are some slight differences between the two, in that kinesthesia only refers to moving parts, whereas your proprioceptive ...
- 343
10
votes
Accepted
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 ...
- 3,194
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: ...
- 3,194
9
votes
Accepted
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 ...
- 1,272
8
votes
Accepted
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 ...
- 1,094
7
votes
Accepted
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 ...
- 3,194
6
votes
Accepted
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 ...
- 3,194
6
votes
Accepted
What can cause a visual disturbance followed by a headache?
What you're describing has been known since antiquity. What you first describe (an arc-like enlargening area of blurry vision) has been called a scintillating scotoma and artists and patients alike ...
- 9,384
6
votes
Accepted
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 ...
- 2,781
5
votes
Accepted
Fainted history in both myself and my father. Can it be related?
There is, unfortunately, no yes or no answer to this, especially not on-line. However, these information can help:
There can be various underlying causes of fainting, mostly cardiovascular or ...
- 2,833
5
votes
Accepted
Is the Fight or Flight response considered voluntary or involuntary?
The "fight or flight response" occurs under the control of the autonomic nervous system, which is to a great degree (but not completely) involuntary.
The autonomic nervous system regulates certain ...
- 9,384
5
votes
Accepted
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 ...
- 449
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/...
- 9,694
5
votes
Accepted
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 ...
- 166
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 ...
- 6,742
5
votes
Accepted
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 ...
- 9,694
5
votes
Accepted
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 ...
- 13.3k
5
votes
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. ...
- 401
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 ...
- 274
4
votes
Accepted
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 ...
- 6,982
4
votes
Avoiding acute mountain sickness, high altitude pulmonary & cerebral edema
I checked literature on this and found that following general measures are helpful to prevent acute mountain sickness, high altitude cerebral edema (HACE) and high altitude pulmonary edema (HAPE):
...
- 1,770
4
votes
Accepted
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 ...
- 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 ...
- 6,867
4
votes
Accepted
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:
...
- 15.8k
4
votes
Accepted
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 ...
- 304
4
votes
Accepted
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 ...
- 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 ...
- 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 ...
- 13.3k
4
votes
Accepted
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 ...
- 13.3k
Only top scored, non community-wiki answers of a minimum length are eligible