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Brain
The center of our nervous system and daily thoughts, the brain is a complex, magnificent organ. Ask questions about parts of the brain and their functions here.
2,537 Questions
When your brain cells die will it go back to life again?
No. Your brain can create new synapses, but the cells don't regrow. When a sick brain is viewed on a MIR the areas with dead cells show as holes in the brain, but a healthy brain is shown as a healthy blue and whole.
How is the neurotransmitter removed from a synaptic cleft?
Most neurotransmitters are removed by being taken up by the presynaptic or postsynaptic neurones however acetylcholine is the prime exeption to this as is actually destroyed in the synaptic cleft by the enzyme acetylcholinesterase. The reason this must happen is that otherwise the neurotransmitter would be left in the cleft where it would continue to evoke a response in the postsynaptic cell for longer than it should. For this reason reuptake and catabolic enzymes are often the targets of drugs gieven to treat neurological disorders. Another possible problem is wastage, if the neurotransmitter is left in the cleft it may difuse away and be wasted giving the presynaptic neurone more work to do creating more.
Which section of the brain is concerned with reasoning?
The frontal lobe involves the ability to recognize future consequences resulting from current actions, the choice between good and bad actions, the override and suppression of socially unacceptable responses.
It also is not fully developed until the age of around 25.
Is your tonsils connected to your ear?
i cannot fully answer this question however i feel i can perhaps contribute...
I've had one of my tonsils removed, i was about 7 years old when i was slowly un able to hear. i did not completely go deaf but i was definitely having a lot of trouble hearing.
doctors perfomed a lot of tests on me before finally realizing it was somehow due to my tonsils. they removed my left tonsil and sure enough, i was able to hear again.
i don't really know why they didn't remove both tonsils and i really wish they had because my right one has given me BIG problems ever since.
I've had tonsilitis about 8-9 times, the most severe case was when i was completely un able to open my mouth and had to eat through a very small straw. this lasted about 2 weeks.
the strange thing is when my tonsil acts up, i am again un able to hear... but only from my right side... which is the side with the left over tonsil.
when i get sick, even a common flu will hit my right ear and i will get an ear infection.
i get ear infections maybe 1-2 times a year since i was 8.
i do not really know the relationship between tonsils and hearing, but i definitely know they have to coinside.
good luck.
Next person...
Hey, I'm someone else. Although that story above was pretty true, I would have to say that it did not really provide enough information for people that might be trying to get the answer. As for me, I think it is because of the Eustachian tube that connected your inner ear to your throat, which a tonsil can have an affect on since it's in the throat.
The tonsils are two masses of tissue that lie at the back of the throat. So when it gets infected, the infection also spreads to your ear by the tube and it causes hearing problems. Although people might be wondering why I know about this, just to let you know, I do not have this problem with my ears, but I am studying for a test, and since I did not participate well in class, I have to do a good research tonight :( I am one of those people looking for the right information but have not found what I am truly looking for in here, so I decided to improve the answer, because at least I remember this from my class. Yeah, I won't do the same mistake the next time. You can see to it that I don't :)
Neuroglial cells that helps form the blood brain barrier?
The blood-brain barrier (BBB) is a diffusion barrier, which impedes influx of most compounds from blood to brain. Three cellular elements of the brain microvasculature compose the BBB-endothelial cells, astrocyte end-feet, and pericytes (PCs). Tight junctions (TJs), present between the cerebral endothelial cells, form a diffusion barrier, which selectively excludes most blood-borne substances from entering the brain. Astrocytic end-feet tightly ensheath the vessel wall and appear to be critical for the induction and maintenance of the TJ barrier, but astrocytes are not believed to have a barrier function in the mammalian brain.
Read more: What_is_the_structure_of_blood_brain_barrier
How is the brain informed that a receptor is adapting to a stimulus?
When a receptor adapts to a stimulus, it sends progressively reduced signals to the brain. The brain interprets this decrease in signals as adaptation, resulting in reduced sensitivity to that specific stimulus over time.
Why is the amygdala important?
It is a roughly almond-shaped mass of grey matter inside each cerebral hemisphere, involved with the experiencing of emotions. The amygdala is a section of the brain that is responsible for detecting fear and preparing for emergency events.
What are the differences between human brain and sheep brain?
The human brain is larger.
The positioning of the hind brain is different, due to the erect position of humans.
Convolutions are increased in humans (increases surface area).
The sheep's brain has a smaller cerebellum (lesser motor control/less complex learned motor behaviors).
There is a larger pineal gland in sheep (related to circadian rhythms/seasonal reproduction).
What happens when the brain is starved of oxygen on a regular basis?
Anoxia is damaging to brain cells. Without O2, cellular respiration will not function, which means that brain cells must use up what little reserves they have in the way of cellular energy (called ATP) to maintain their membrane potentials. Without restoration of O2 cells will become necrotic (i.e., their membrane potential will run down, they will lyse and die). Often this will be accompanied by neighbouring cells becomming apoptotic (programmed cell death).
What is the last part of the brain a baby develops?
The frontal lobe is the last part of the brain to develop fully.
What happens with your brain when you think?
It becomes more active. You can see, on an EEG, more "firing" of the neurons.
How much percentage of brain is used?
There is a wide-spread myth that humans only use 10% of their brain. While no hard percentage has been published, studies of the brain and imaging technology reveal that almost all of the human brain is being used at any given time.
You are thinking back to the last time you ate your favorite cheeseburger. You are experiencing a?
mental image
What are three ways that the outside world communicates with us?
The internet, phones, and television are three ways the world communicates. While telephones and the internet accept input from the user, television is usually just a one-way communication.
impulses are sent to the brain and immediately,the answer to what you are asking is given so just generally, chemical impulses are sent to the brain....few people have better memory than other firstly the trait of the person or gene or secondly the nutrition th person was given to and thirdly also the educational background of the person....
Does white beans contain serotonin?
White beans do not contain serotonin itself, but they are a good source of nutrients that can support serotonin production in the body. They are rich in carbohydrates, fiber, and protein, which can help regulate mood and promote overall brain health. Additionally, they provide essential vitamins and minerals, such as folate and magnesium, that contribute to the synthesis of serotonin.
Is iMusic brain enhancer a hoax?
For those that don't know what iMusic is, visit www.getimusic.com
It's some sort of music which is said to be able to greatly enhance your brain performance, increasing your IQ, energize your body, or even increase your physical feats (muscle, endurance, injury reduction, etc) according to its release package.
On their website they say that their technology has been proven. And indeed they give tens of references of studies that have been done during the last few decades. Most of these are about some form of brainwave training and neurofeedback. None of those is specifically about iMusic. They have also done a few (I found three) studies themselves with very small test groups (nine to ten people per group) that showed clear results in favour of their product. But a) the study groups are too small to be significant, and b) significant details are not given in the research briefs. While in all tests one group was asked to listen to "enhanced" music, it is not clear whether the other group listened to the same music only that it was not "enhanced", or whether they listened to completely different music. I even sent an inquiry to Volition about these questions, but got no useful answer. No information beyond the nearly useless research briefs. There is no doubt that music has an effect on the brain. From the evidence provided on the iMusic website (assumed that there are no lies) it cannot be said whether the "enhancement" has an additional positive effect or not. Since they give a lot of references that are not directly related to the product, I assume that there has been no significant research directly related to iMusic. Since it is hardly possible to do any double blind testing, it will be hard to prove or disprove the effectiveness of iMusic as compared to a good choice of "normal" music. I'm convinced of one thing, though: it will work - to some extent - if you really believe in it.
