Anatomy, Physiology and Neuroscience

Hi everyone, I am reading about parkinson's disease and all, and obviously there is dopamine. So after what I read, dopamine is an inhibitory neurotransmitter, which means that it stops the impulse. So by having a balance between acethylcolin and dopamine, the movement can be controlled (correct me if I said something wrong). Now my question is, dopamine has this role in movement, however, I read that it also has a role in motivation and all that stuff. So what is the diffrence between these two types of dopamine? Are both "types" made in the substantia nigra? Do they both go to the striatum? Thanks in advance.

Can you explain love with science? I think you can I think it is like 90% basic instinct about what to look for in a partner for attraction. But also I think there is some spirituality that cant be explain in science.

could somone please explain in detail what are stem cells are and thier function thank you.

Fish breath by taking in water threw thier mouths and out thier gills. So if fish stop moving do the stop breathing. Or do they sleep in a current. And if fish did sleep in a current wouldn't that current push them along, canselling out thier movment. Or do they just not sleep?

When human suffers big hurt, how human body uses his resources in his body? Are their any rules? At this time temperature maintenance, immune system, repairing, etc, the body is required many resources very short time.

I know that signals are received using dendrites and sent via axons. But how is the original signal created? Every signal has to start somewhere, so how to the neurons originally fire? Does a sensory stimulus automatically create a pattern of signals to represent the incoming information, which subsequently trigger other neurons which allows for reactions? But if somebody were to be totally deprived of all sensory input, would they be unable to function? Being blind, deaf, numb, and olfactory deprived, would they still be conscious and capable of thought? Also, neurons fires using a chain of chemical reactions along the axon to pass a charge down a line. Supposi…

The thalamus is the most wired part of the brain, with input/output going nearly everywhere in the brain.The thalamus has also been shown to be critical to consciousness. Damage to the thalamus can render a person brain dead. Another observation are thalamo-cortico-thalamic circuits which wire/loop the thalamus to the cerebral matter. What I would like to do is pose the theory that these loops allow the integrated perspective of the thalamus (all the brain) to relay data to the cerebral mind which shows up as inspiration; enhanced consciousness. If you look at the conscious and unconscious minds, the unconscious mind contains more data. For example, with hypnosis, on…

Hello All, Below are comments I've posted in other forums regarding the nature of sleep. I welcome your thoughts: "If some of us do not know why we sleep, it is because we haven't examined how sleep may have evolved among sleeping species. Nearly every species enters a state of rest that could be interpreted as sleep. This suggests a common evolutionary advantage to the sleep process among sleeping species; i.e., we would not have sleeping species if sleep did not offer some survival advantage to ancestral species. When we examine the neurological components of sleep in most animals, we find that its various attributes arose at varying stages in neural evolut…

Hello All, Here are other comments I've posted elsewhere that some of you may want to explore. Again, I welcome your thoughts: "This difference between cortical volume and interbrain size supports a distinction suggested by the relative factors effecting cortical evolution among species divergent from humanity. While researching brain evolution for a book I wrote a few years ago, it became clear to me that the cortical development among animals ancestral to humans might have been compelled by a disparity in their sensory acuity. In a nutshell, ancestral animals, akin to contemporary primates, may not have had the sensory acuity of the predators they likely encoun…

Hello, I'm brand new so I hope I get this right. I am concerned about my Grand daughter - aged Four and just about to start school. Last week I took her to the park and she wanted to go on the swings. I pushed her and took her to the height where she was very giggly, then stopped so she could slow down. She went quiet and then all of a sudden, threw herself backwards and I had to grab her to stop her falling out of the chair. I was a bit concerned but didn't tell her Mum. Yesterday while at another park, she wanted to go on a roundabout. Same thing; after she became very excited I stopped spinning it but after five seconds or so she threw herself backwards…

Down Syndrome babies suffer from Trisomy 21. We know "Down-generated" substances enter the mother's blood through the utero-placental barrier. The mother's body obviously matured many years earlier, so its development is not affected. However, if the Down baby is a twin, it's possible that Down-generated material can pass into the blood of the normal twin and produced Down-related phenomena in the otherwise normal baby.

Yoga is the ultimate science. Not only can you do all those things that people are wondering about in some of the forum topics, like control your heart beat, regulate appetite, and control body temperature it can do so much more. Rest assured it IS a science. You really need to look into it to find out about it, and I mean get some traditional information on it. It is also the ultimate science of the mind and brain and the physical body combined with a truly yogic diet, as well as of life. You may not want to hear about Me but I have done extensive study into the science of the mind and have reached its ultimate conclusion - Enlightenment - yet there is …

How do you tell the difference between evolved traits and 'programmed' ones? I'm thinking specifically of differences between the sexes here. For example I've read various things in 'science' books like The Female Brain (Louann Brizendine) like how women evolved to cry more easily, or that they find it much harder to keep their emotions to themselves. How does anyone know these things are due to evolution? As a society we give females the right to cry but not males. We give females the right to be vulnerable, but not males. Girls and boys are treated differently while still wearing their amniotic membrane. Girls are mostly treated as just potential nurturers/encou…

Drinking seawater is known to be very unhealthy. There is 3.4 grams of ClNa in a litre; but on a 200 ml. soup would not be too unusual if has 0.68 grams of salt as seasoning (the same proportion) , and would not be detrimental to health. Is it because other harmful salts in the seawater or there is something else am missing ?

Hi. I need to critique a research paper and present it for a course I am taking. I need help critiquing the paper? How should I start? Any help would be appreciated.

Research presented at the Annual Meeting of the Society for the Study of Ingestive Behavior suggests that the key to losing weight could lie in manipulating our beliefs about how filling we think food will be before we eat it, suggesting that portion control is all a matter of perception. est subjects were more satisfied for longer periods of time after consuming varying quantities of food for which they were led to believe that portion sizes were larger than they actually were. Memories about how satisfying previous meals were also played a causal role in determining how long those meals staved off hunger. Together, these results suggest that expectations before eating…

Guess I'll try the poll..... and by environment I don't mean a tree smashing into your head and making you slow or something

Hi. I like to start posting on the forum by this simple collection of photos taken as screen shots from the popular Acland's medical video Atlas of human Anatomy. I have taken these pictures out of the video myself, so they are my own work. I intended to make the pictures for common use of medical students everywhere in the world with no copyright. so, you can publish them anywhere you like, my only hope is that this variety of selected, clean pictures help you studying anatomy. Some pictures are taken from Netter only when they are not clear enough in Acland. here are a sample of them: [[Link removed]] also: [[Link removed]] Now, the download…

Does excessive sexual desire at an early age lead to early puberty ?

I watch a show on TV of a person who swallowed toothbrush and the person was not choking (how can this be )but the ER doctor did not treat it has a emergency. Other show a person swallowed plastic pen cap other kid a plastic toy very small the size of a pen cap ( not choking strange ) .The doctor said it come out going through the bathroom and if not than come back. I thought plastic is bad ? And is a emergency? Why did these people not choke ? Other show on TV a person cannot go poo and the doctor was saying drink lots of water!! How does water help? One last question a friend I know was saying if food goes down the wrong way you can get fluid on the …

as we all know the masseter is the mussle that pulls on the jaw and we all know that the sternocleidomastoid is in the neck and i dont really know what it does ♥

as we all know the masseter is the mussle that pulls on the jaw and we all know that the sternocleidomastoid is in the neck and i dont really know what it does

A lot of people are arguing about weather we use 10% or 90% of our brain How much of the average human brain do we use? Dose most people have a different percentage use? What could that extra percentage be used for? and what would It be like if we all used 100% of our brain?

I just signed up for a symposium I thought I might share with everyone. Case Western Reserve University will be hosting Neurocritical Care 2010, a Global Conference of Neurocritical Care and Music in Cleveland, Ohio on October 7-9, 2010. The conference will feature world class experts in the field presenting information on stroke management, bioinformatics, TCD Ultrasound and a fascinating symposium on music and the brain. The website for the event is clevelandneurocriticalcare.com for more info.

Just wondering, but if you were to put some sort of containment vessel around the head of an human, then extract the skull/skin leaving just the brain. would it continue to live. If the vessel was filled with a sort of nontoxic substance similar to blood, the brain would still have an adequate supply of oxygen. But is there any other compounds that are required for the brain to live? Simply put, if you were to extract a brain and put it into a jar full of "blood", would it live?