Anatomy, Physiology and Neuroscience

Why do magnetic feilds like say from a magnet on top of your head not affect the brain? It would alter the current up there, but obviously doesnt. Or any part of the nervous system in fact, why dont magnetic feilds affect? The only thing that I can suggest is an outer layer of insulation to stop, but wouldnt just stronger magnets affect it eventually? thanks.

Hi: How does extreme nerve excitation cause shock? Quote from the below site: http://books.google.com/books?id=AB4fbXqlUJwC&pg=PA373&lpg=PA373&dq=%22extensive+superficial+burn%22+shock&source=bl&ots=wkO_EbLn9m&sig=ywnhw2l0NlXhfCE9DtVBPjbE8Ag&hl=en&ei=SBFVStunMpP6sQPMvJ3NDg&sa=X&oi=book_result&ct=result&resnum=6#v=onepage&q=%22extensive%20superficial%20burn%22%20shock&f=false "An extensive superficial burn produces great immediate shock, due to involvement of so many sensory nerve endings in the skin". What is the mechanism by which this shock occurs? Is this shock fatal? Thanks, Gre…

Three stages to consciousness Suppose something happens that frightens me. My blood pressure goes up, my heart starts beating very fast, the release of adrenalin creates a great burst of energy, I may even jump or start to run. All of the feelings that are a result of these biological happenings reach my consciousness and I now know that I am afraid. Many non human creatures have emotions—“human emotions however have evolved to making connections to complex ideas, values, principles, and judgments”—thus human emotion is special—the impact of feelings on humans is the result of consciousness—a distinct difference between feeling and knowing a feeling—“neither the…

This may not be the appropriate forum, but.. When someone's thinking, you often see their eyes darting around, but not really registering the external environment. Has anyone ever discovered a correlation between the directions the eyes look and what's being seen internally? As a gross example, if someone were remembering a horse race, might her eyes track from left to right (or vice versa) matching the visual memory being experienced?

Why is the duration of an electrical stimulus not always independent of the frequency?

Hi, I have been interested in lucid dreaming for some time. I found this forum and thought that someone can give me some answers to some questions. Here is my whole thought process on how the brain works while lucid dreaming:http://forums.philosophyforums.com/threads/lucid-dreams-33391-2.html I also sent some e-mails to Professor Allan Hobson on this topic, I got in reply a document attached in this topic. I wouldn't be suprised if someone gives or doesn't have much time or will to answer this topic. Any ways thanks a lot for any replies. ========== "Willowz: This will be a shot, maybe a long shot at a pragmatic way of looking into the the way the brain …

Hey im new to the forum but i have a question that was parcially answered here so I want to ask it differently. I was wondering if there was a way to transmit audio and visual impulses from the imagination part(s) of the brain and make them visable on a computer or other monitor. Its just something ive been thinking about for a while. Anyone have any input?

how can chickengunia be cured at the earliest ???

I have long been fascinated by sight. From the simple detection of light in a neurologically meaningful but simple way, to the complex perception of objects and space including objects and shapes never before experienced, to the fascinating and fun tricks of vision. I recently heard of a fascinating syndrome, common among the visually impared and blind, called Charles Bonnett syndrome. People experiencing Charles Bonnett syndrome hallucinate. It's not the psychotic dysphoric hallucinations that most people think of when they hear the word "hallucination", rather what they experience is a sort of "movie in the mind" where images of things, people, faces, etc. engage in…

Some recent findings suggest that the: ISULA or Insular Cortex , a prune sized region of the brain located under the frontal lobes on each side of the brain present some sound reasoning that the insula plays a crucial role in addiction of all types and especilly cigarette addiction. People who have sustained injury to the insula have reported an instant and permanent break in a smoking habit. Some article regarding all this in Science ? about 10 years ago. Recent advances in MRI imaging and such providing new tools for research. Significant implications for alcohol and drug addictions. Found a better article with detailed diagrams and such at: http://en.wikipedia.org/wik…

All sensory input to the brain,except the sense of smell connects to the thalamus for preliminary processing. See http://www.changingstates.co.uk/brain_function.html for further information regarding that. The sense of smell alone has it`s own special organ called the olfactory bulb. This organ is further divided and has two seperate pathways on to other portions of the brain. One of these pathways,the accessory olfactory bulb, leads to the hypothalamus and the amygdala where the axons are thought to influence aggressive and mating behavior. For more on this go to http://www.absoluteastronomy.com/topics/Olfactory_bulb#encyclopedia. I find it very intriguing that this on…

I know our brain Is the one that processese all info that we take in, so in that sense it is, but, surely, the brain does not have a whole bunch of transistor like devices making up processer unites do they? Im not really sure how the brain takes in info and decides what to do with it, has nueroscience found out yet? What has it found out about the brain? If I understand right, CPU's work on algorithms and logic gates{ wich I really dont understand, I just read about on a website}[like to though], And that is how we make things like robots and computers{right}? but, our brains do not work the same way, do they? instead of doing every calculation to find som…

I was thinking about it, and I cant really remember ever learning this, and I can not seem to find anything on the internet, it is bugging me. How do we remember something physically? Surely nuerons cant connect for something like short term memory? and, How does long term memory work? Thanks.

How does prilosec, a competitive inhibitor , affect pepsin/protein hydrolysis in the stomach?

Hi guys, This appears to be a fundamental concept in exercise science, so is my understanding of this correct? I take it, when hamstrings are tight, excessive pressure is placed on the antagonists which creates a muscular imbalance which excessively flexes the lumbar spine backwards, causing lordosis. This reduces the effectiveness of the lumbo-pelvic rhythm, as the range of pelvic motion in the anterior tilt decreases and the range of forwards lumbar motion increases in order to compensate for this, which also means that lumbar motion occurs earlier during forward bending. In regards to the quadriceps, the opposite happens when they are tight, meaning that anter…

Hi everyone! Great to be here, this being my first post I'll just briefly introduce myself - I'm a final-trimester Health Sciences/Arts student from Australia, and have recently started a unit on anatomy just as an elective to finish things off (my main areas are nutrition and health promotion). Now onto my question, here and there I see references to 'functional' and 'accessory' motions/actions. I have a vague idea that the latter term implies something auxillary to a main feature, but I am not sure exactly how to use the terms in an anatomical context. For example, in regards to articulations, what exactly (if any) would be 'functional' and 'accessory' moti…

Took first exam and totally drew a blank. When in class, I'm on top of my game. Can't get past exam anxiety:eek:

When the brain develops a tolerance to certain drugs, is there a limit to how tolerant it can be? I ask because I develop a serious tolerance to caffein, and when that happens, it doesn't matter how much coffee I drink, I'm just crashing. I have to abstain from it for a week to get back to my normal level (after which point, one cup of coffee will send me buzzing for 18 hours). The crash usually last about 3 days, but that's usually only after several days of drinking coffee. If I have a few cups on just one day of the week, I don't notice much of a crash at all afterwards. For this reason, I'm always perplexed how others can go day after day drinking 3 or 4 cups of c…

? As far as I know this is true for all vertebrates ? What is the evolutionary reasoning that explains this ? ...dr.syntax

I was thinking on how creativity could be implemented into a machine, wich led me to ponder, is creativity just a collective amount of past experiences that can relate to what is wanted to be created? Is there any experiments or discoveries similiar to this? what do you guys think?

Hi. Itching is not a painful sensation, as pinching, or piercing, or a burn... Scratching provides relief, and pleasure. If some of you have had serious/intense skin complications; will understand scratching can get pleasant to extremes. What goes on with the causes of itching ? Not only related to insect bites, but the sporadic skin manifestation, either by a recognizable presence of a microbe or none. How come scratching provides pleasure? An 'evolutionary' thought of scratching providing dissemination of microorganisms under fingernails... is that real ? Let me say it different... Do itching causers provide chemical pleasure to bearers so scratchi…

I was wondering if anyone knew how to test for depakote or prolixin in the blood or depakote in a pill.

Looks like some interesting work came out of NorthWestern http://www.basic.northwestern.edu/g-buehler/nerves.htm http://www.basic.northwestern.edu/g-buehler/contents.htm#cont3 the online reading kind of like a course study on a hypothesis any think this idea has merit? perhaps some of the posters can add a bit and share with us

Hi: I have speculative neuroscience question. Let’s say that the PSTSNs in my body – and the ADFNs supplying them -- don’t have any refractory period or any other protections against hyper-excitability. PSTSN = Peripheral Somatic Tactile Sensory Nerve ADFN = A-Delta-Fiber-Nociceptor Non-ADFN = Sensory-receptor/nerve-ending that is not an ADFN or the portion of a nerve that is attached to such a sensory-receptor/nerve-ending ADFNPSTSN = A-Delta-Fiber-Nociceptor supplying a PSTSN PSTSNNon-ADFN = A non-ADFN supplying a PSTSN Tactile = Pertaining only to sense of touch [including temperature, pressure, pain, tickle, vibrations, movement, posit…

we are currently planning on conducting a research and we have to increase WBC to more than normal in mice as part of preparing the specimens for tests. what method can we employ?