Brain Definition and 740 Threads

"Electromagnetic" brain? Hello there! It's a fact that our brain emits an (weak) electromagnetic field. But do you know its precise intensity and its frequency (in Hertz)?

Hello everyone, Ok in the cerebralcortex I saw a pic where there is upside down HAL, the brain controls head,arm, leg upside down. Now I don't know much about this area. I know there is only motor cortex, so are these areas referring to axons that are coming out of motor cortex and supplying...

Ok, let's say we have "Mr. Big's Jupiter mining corporation." These guys mine stuff from Jupiter's moons and ship them back to Earth(and yes I know this is currently economically infeasible). Just how much delta-v can they save by using gravitational assists from Jupiter and its moons? How...

Hello everyone, Ok I read the definitions. I think it is how the brain learns from mistakes, and remembers stuff and rewires itself. But I would still like to get someone's else's opinion on this. Thanks :smile:

im trying to understand how photons allow the brain to create an image. I understand that light is made up of photons. These photons are emitted from an energy source and reflect off an object and hit the retina which produces electrical signals that the brain creates an image from. What i don't...

So, this is my first post in the medical science section of the forum. So I was just in the shower and a question occurred to me. When I hear about how the brain controlling the body it's always "the brain tells this group of muscles to do something"...or 'the brains tells this organ system what...

This is a pretty easy problem, there is a room that is enclosed and all of the walls are opaque, there is no way to know what is going on inside from the outside (you are on the outside). There are three switches outside in which one of them has a circuit that flows to the light bulb. You can...

Hi guys. I'm new here and pretty much a layman when it comes to physics and astronomy. I came across this hypothesis a few months ago, but have been looking at it the last few days. Anyway, I'm hoping you guys know about this so you can help me. Search wikipedia for it if not. I'm not...

Very amusing. Left wingers have thicker anterior cingulate while right wingers have more pronounced right amygdalas. The mischievous could argue this is about brains tuned for handling task complexity and brains sensitised to fearful threat. http://www.bbc.co.uk/blogs/today/tomfielden/

Hello all, this is my first post here. I know these things have been discussed before in this forum, but that was several years ago, and I have some questions that weren't asked. Basically, I need to know how information is stored in the brain, presumably as memories. What I already know is...

Just to let you know, this is for something I am writing. Well, its not the main topic, just a little something I wanted to expand on. Is there any known drugs/vitamins/supplements that people take to increase their "Brain power" ? By brain power, I just mean anything from increasing...

An article in http://www.scientificamerican.com/article.cfm?id=brain-electric-field" states: The original paper can be found http://www.med.yale.edu/neurobio/mccormick/pubs/fields.pdf" . In http://www.scientificamerican.com/article.cfm?id=neural-feedback", they describe a bit about the...

Hello everyone, I know nerve fibres inside brain are not covered by perineurium etc like Peripheral nervous system. Are they still covered with connective tissue, support cells, myelin etc. I mean inside the brain , a collection of nerve fibres, how are they held together with no connective...

Hey there, So I'm a bit of a newbie on this, and I'm just kind of wondering on this subject... But could someone give a brief description of how conservation laws apply to electric charge? And more specifically, I'm thinking in terms of how it applies to synapses and such in the brain...

Would you consider it feasible that the structure and function of the human brain can be better described by using more than space-time dimensions?

I've been interested recently in using binaural tones to induce brain states conducive to studying. I went and bought a 30 minute binaural beat off of Amazon for a dollar which is supposed to help the brain enter a gamma state. I've got a friend who is a musician in the realm of electronic...

We know that color is a sensation in the brain from interpreting different wavelengths of light. Therefore, color does not actually exist in the real external universe. Why not take it a step further and say that the sensation of brightness is a human concept. Not that actual magnitude of...

http://www.nytimes.com/2009/04/06/health/research/06brain.html" The article is a little dated, but interesting, I had never read it till now. A friend sent me info on Andre Fenton's work...

Hello readers, I have been thinking and if you bear with me hopefully I don’t sound too mad!. I have read an interesting article and in it a leading scientist has claimed that A detailed, functional artificial human brain can be built within the next 10 years. Henry Markram, director of the...

A person in his early 20s becomes mentally very passive, his brains doesn't really work, when he is in a public place such as a university lecture hall. The topic which is an easy task when he is alone becomes a mammoth task when surrounded by others. Could you please help me to identify this...

1. your rope being (7 words) 2. KCIUQ (2 words) 3. HURRICANE (5 words) 4. ha ir ha ir ha ir ha ir (2 words) 5. rcatcherye (4 words)

Stimulating the brain with a nonpainful electrical current can jump-start peoples' math skills, scientists say. The finding could lead to new, long-lasting treatments for people with moderate to severe math impairments such as dyscalculia, or "math dyslexia." This learning disability prevents a...

I am a "physics guru", at least at my high school's level (which isn't really anything at all). I know several advanced integration techniques, linear algebra, and fairly advanced methods for solving differential equations. Even with all of this mathematics background, I still have not taken...

Alright people...come up with a fix in algebraic form, using $ for money, I for intelligence and whatever other variable. Make it interesting :) haha

[b]1. The human brain consumes about 22 W of power under normal conditions, though more power may be required during exams. How long can one Snickers bar (280 cal per bar) power the normally functioning brain? [Note: The nutritional calorie, 1 cal, is equivalent to 1000 calories (1000 cal) as...

[b]1. Ok, hi everyone, I'm new to the forum. I'm hoping you can help me a bit because I'm in trouble now, and a few concepts need clearing up. Ok, so there are two questions #1 A ball is rolled off a table 1 meter high, and lands 4 meters away. what is the velocity for the x vector? What is...

Mild cognitive impairment (MCI) may be slowed with B vitamin supplements according to a recent UK study. Other studies have shown that elevated blood homocysteine levels are associated with MCI and more severe cognitive dysfunction including Alzheimer's disease. B12, B6 and folic acid are known...

Hi I have suffered from poor sleep due to anxiety and have had bad dreams. I began to research on sleeping problems and i came across a thread in a forum where someone wrote that altered mind states can occur as a result of anxiety stress and this let's the brain do things such as see or have...

In my attempt to obliterate my ignorance I'd like to discuss something related to the recent news story about a young man who attached two clamps to his nipples and then had a friend plug it into a wall socket. http://news.gather.com/viewArticle.action?articleId=281474978486647" <-- News Story...

how many types of brain signals are there? or if a person thinks of writing a word the signals that perform this action what are those called..? (brain signals is not my subject but i want this knowledge to further use it in a signals and systems project relating to human brain) thnx

Hi. You may only understand what I am going on about here if you play an instrument. I have often noticed that there are songs that I really love and know inside out, which, in my mind, I can play almost perfectly in my head; most of the parts and certainly all of the melodies etc. But...

Homework Statement Let X=10000000099 represent an eleven digit no. and let Y be a four digit no. which divides X.Find the sum of the digits of the four digit no. Y. Homework Equations None The Attempt at a Solution I guess I have to factorize X. But it is really difficult to...

Another possibly unusual question from me, may also enter in the realms of philosophy or math, but I do not think that physics is a wrong place for it. It is possible to find information about size of the universe and number of atoms in it and such. We as humans can imagine numbers of...

It's a pretty simple question but it's been racking my brain. Say I wanted to build a shock-proof computer case, would I want it to be heavy or light? My though is that it should be heavy. If I kicked a 1Kg case with 1000 Newtons of force the case and components would accelerate are...

Hi everyone, I am actually very new to biology and unable to understand some of the things. My question is that, if our heart is working because of the blood it pumps, I mean that our heart needs blood for pumping all the time and if it don't get the blood then it may stop working ! So...

This study presents evidence that the complex endogenous (internal) electric field generated by the activity of individual cortical neurons exerts a feedback which has a global modulating effect. The linked summary links to the full article (PDF). (The second link is a bit slow as this is a long...

There's really no such thing as "upside down" in an absolute sense, only relative to what we're used to. Why then does our brain invert the image? What's wrong with leaving it the way it is?

Homework Statement I'm trying to solve for x in a chemical equilibrium problem (college chem). Once x is found I have no problem finding equilibrium concentrations. What's important is below. Homework Equations 5.10 = [(1+x)/(1-x)]^2 --------> x=.387 (right answer) The Attempt at a...

Triune Brain Not rigorous enough for pure neuroscience. But rigorous enough for people to grasp the brain? The actual reality is complex and gritty. Yet we don't explain the reality of quantum physics- we present simple, understandble analogies for people to grasp. My question to...

Hello all, experts and otherwise. I'm looking for some links to software and documentation for selecting Regions of Interest (ROI) in MRI data of the human brain. Saving ROIs is a must. Any tips also appreciated. Thank you!

Connecting the blood supply and other organs are already completely possible. It is also possible to keep the brain alive for hours outside the body. Remaining concern is the spine and the 12(x2) nerves which connect to either side of the brain. http://en.wikipedia.org/wiki/Cranial_nerves The...

I am interested in building replacements for every single body part and bodily function, (with a sort of non biological replacement, more electrical and mechanical.) in order to support the brain. I know that the brain is the least understood body part, but my wonder is just how understood is...

Here's my background: Completing an engineering M.S. this year. I've done a lot of programming and building systems of ode/pde, neural networks, finite & discrete element models, hydraulic networks. I like coding and computer models very much. My problem is the research topics are...

I'm currently reviewing the last chapter of griffiths e&m (relativity) in preparation for griffiths elementary particles. I've chosen to do particle physics for my master's thesis. I've got total brain fog. I had never studied particle physics before, so reading the first 2 chapters was...

I was reading about how the brain is formed early on in life, but I have a few questions left. You are born with all yor brain cells (if this is not correct let me know) and when we first start to observe the world these cells start to wire themselves to other brain cells. So if a 1 year old...

First I'd like to thank some frequent contributors to brain topics in the Physics Forums: (in unbiased alphabetic order) atyy Moonbear neurocomp2003 somasimple zoobyshoe Some great discussions on brain topics here! Based on frequency of the word "brain" in subject headings I would...

http://www.readnrock.com/?p=38 It's probably been posted before, but I still find it interesting. I can easily switch between the two, but I saw it going clockwise first. I don't believe that this proves my iq is over 160 (I don't believe in iq tests anyway...) I'm going into...

I can't seem to remember anything new. But I can remember lots of crap from my fresher university year. I think a Chopin Nocturne and Cauchy's theorem (the one about the existence of a subgroup/element of order p, if p is a prime and p divides |G|) got the last few kilobytes. Need to...

it comes together as it goes on ask any questions you'd like So the last couple weeks iv been kinda in a little engineering stage thinking about different ways to produce power and what not in this transition from school to life iv came up with a lot of good ideas and I mean it lol I...

"New evidence caffeine may slow Alzheimer's disease and other dementias, restore cognitive function" http://www.physorg.com/news193317154.html