What parts of the brain do not have a blood brain barrier?
141909
That woman is right. It's a hypothetical barrier. The cells surrounding the brain are very good at exporting substances from the within. This makes them very critical and as such few substances pass with the exception of many illegal and legal opioids. Lipohpilic drugs pass readily into the blood brain barrier. Alcohol also passes but just because you drink alcohol with a drug does not mean it will pass. It matters where and how the drug is metabolised. And thats beside the point alcohol and drugs are strictly prohibited. To do so would be to set your set up for a lacquered wooden box.
1081697
Parts of our brain are used for senses. Touch, smell, taste, etc. They map which parts of the brain relate to which, and it makes psychologists and brain surgeons very excited. It's also how foreplay/non-conventional sex can be explained. See, our lips have one of the greatest surface areas on the physical sense brain map, meaning our lips are really sensitive. So are our, well, erogenous zones, genitals and such. So, we put the two sensitive organs together, and it makes everyone happy. Same explination for kissing.
837887
forebrain\nmidbrain\nhindbrain
221546
Gray matter refers to the portion of the brain that contains a high proportion of neuronal cell bodies, and is thus darker (because of a higher concentration of mitochondria and cellular nuclei), while white matter has a high proportion of axons and dendrites covered with myelin, and is lighter because of the high fat content.  In a living brain, though, gray matter is darkish pink, and white matter is light pink.  It only turns gray and white after being fixed, as in formaldehyde.
713546
Great question but a hard one! Humans differ from animals by having a large brain, yes, but there are other parts that are alonst unknown. One of them is located under the brain and is the center of memory and emotions*. Sensations are rather treated by the bulb ending the spinal chord. \n*I forgot the englisn name.\naddition:\nAnimals kills to feed themselves and survive. This also helps the sustaining of Evolution.... Cows eat herbs, nobody says that cows kill herbs but all plants are part of living kingdom.\n\nWe kill because we have incorrect emotional reactions to situations, because we are influence by publicity, news, movies, books,ect. We take bad solutions because we feel unable to react without the use of violence. THIS IS WHAT PARENTS SHOULD TEACH! But they often behave stupidly. Sorry that's a fact and children are emotional hostages of their parents.\nWe are hostage of marketing. And we all forgot a very ugly word: Responsability!!!   we are responsible of protecting our rights! \nI would highly suggest to read the american constitution. This is what America brought to the world. Read it! \nend of addition.\n\nDuring the years 1970, neurologist tried experiment to cure some deseases and noticed that the brain was divided in two segments but these were attached by sort of nerves so that the left hemisphere took benefit of the work of the right hemisphere. So it is wrong that the left hemisohere was logical and ''Manlish" and the right "hemisphere treated language matters. In fact, if we see a cat, this is first treated by the vision center that is a complex part located at the back of the left hemisphere. But recognizing a cat needs the action of the right hemisphere. Since these two hemispheres form our brain, as they are linked by sort of nerves, we don't make the difference. \n\nEmotions and memory are treated in a different organ. This organ can be injured, under-performing ect. \n\nWhat we can explain is that sensations can cause emotional reactions. But neurologists discovered that all the brain was involved in each element whatever it is logical, sensation, emotions, ect. \n\nThis can cause confusions! For example, we tend to Consider love as a better "trigger" to have a child then the need to insure reproduction. This is supposed to insure a better life to the child. All animals take care of their new born childs without educating them for a long period of time. Others give a real formation to their childs (mostly carnivors).\n\nOur animal part is not important. We are among animals who live in society which means that individuals need to communicate with others and have a job that improves the status of comminity.\n\nBut so many things traumatize childs and teens (as well as adults!) that the emtional answer is not always appropriate). \n\nThis was in depht studied by Neurolinguistic Programation or N.L.P. created by Bandler and Grinder.\n\nVery shortly, they say that if you are feeling jealous, whatever the reason is, it is better to switch this emotion to another one that can help you get out of this sad situation. \n\nbut first, there are axioms:\n1- We cannot not communicate (someone who refuses to speak gives a pretty good answer about what he feels! \n2- The one who communicates is responsible of the clearness of the message. \nect. \nBooks are found in libraries and are not meant to cure psychological problems only but to improve our capability to be understood.
1001417
The choroid plexus is the area on the ventricles of the brain where cerebrospinal fluid (CSF) is produced.\n\nChoroid plexus is present in the superior part of the inferior horn of the lateral ventricles. It follows up along this boundary, continuous with the inferior of the body of the lateral ventricles. It passes into the interventricular foramen, and is present at the top of the third ventricle.\n\nThere is also choroid plexus on the fourth ventricle, on the section closest to the bottom half of the cerebellum.\n\nStructure of the choroid plexus\nThe choroid plexus consists of many capillaries, separated from the subarachnoid space by pia mater and choroid ependymal cells. Liquid filters through these cells from blood to become CSF. There is also much active transport of substances into, and out of, of the CSF as it's made.\n\n---OR--- (if you want another definition)--\n\nA rich capillary plexus develops in the connective tissue around the neural tube of the 6-8 mm embryo. The roofs of the prosencephalon and rhombencephalon are thin, composed of ependyma that becomes invaded by the capillaries. Ependyma plus pia mater is called tela choroidea; vascularized tela choroidea is choroid plexus (red).\n\nIn the adult, cerebrospinal fluid (CSF) is formed by choroid plexus in the 1) body and inferior horns of the lateral ventricles, 2) roof of the 3rd ventricle of the diencephalon, and 3) roof of the 4th ventricle in the medulla. Apertures in the 4th ventricle (foramina of Magendi and Luschka), which develop during the 3rd month, permit the flow of CSF from within the ventricles to subarachnoid spaces surrounding the brain and spinal cord.\nThe ventricle follows the cerebral hemisphere as it makes its “C”-shaped curve. The choroid fissure and its associated choroid plexus is at first on the thinned medial wall on the dorsal aspect of the developing hemisphere. Later, it continues into the roof of the medial aspect of the inferior horn of the lateral ventricle.\n\nhope that helps you!~
34835
blood pressure.  blood sugar.  nerve damage as a side effect of medication.  brain hemmorages.  stroke.  brain tumor.  viruses.  infection.  hunger.\n\ngo to the doctor!!!!
391783
Sure, you can forget anything that you don't practice, e.g., mathematics, language.  The brain (and its various parts) are like muscles; if you don't exercise them, they will atrophy.  Tony\n\nP.S.  You have some pretty good questions.
956593
A major problem with air travel and blood vessels is sitting down and not moving the lower extremeties. Blood tends to coagulate and create thrombosis which can travel throughout the body. The thrombosis can end up in blood vessels in the brain and block arteries.
155736
The cerebrum, the cerebellum, and the brain stem.  Check out these websites for more detailed information.\n\nI hope this helps.
1106956
here is my best possible explanation, the brain is made up of 3 parts, concuss, sub-concuss, and super ego. between wake and sleep our concuss mind and sub-concuss mind actually link together. and in rem or deep sleep its or super ego and sub-concuss linking together, dammit Kirk i am not a doctor.
306881
All that is really known for sure is that there appears to be more electical and chemical activity in each side of the brain when performing certain tasks, but where there is a misconseption is that one side and one side only is responsible for the activity in a given subject area. Most things require many parts of your brain, some more than others.
592954
Spinal cord\nPeripheral nerves\n\nThere are many peripheral nerves, and many subdivisions in the brain, too. Too many to list, since they cover every inch of your body and every organ system as well.
688238
I have known a few people who have had head injuries. It basically depends on what part of the brain is injured. I would suggest finding a book or website that shows you the different areas of the brain to see what functions could be impaired. You can also ask his doctor or his family to try to get the answer. Good luck, and I hope he's ok.
867849
The brain is not part of the circulatory system........it's infact part of the nervous system. \n\nThe nervous system of an animal coordinates the activity of the muscles, monitors the organs, constructs and also stops input from the senses, and initiates actions as well. \n\nThe circulatory system consists of the heart, blood vessels, arteries, veins, capillaries, platelets and the plasma.  It's basically is an organ system that moves substances to and from cells.
428962
Can stress cause brain hemorrhaging?\n\nSmall amounts of stress do not cause brain hemorrhaging in healthy individuals.\n\nProlonged stress in ill people may cause hemorrhaging. Small hemorrhages may go unnoticed by the patient. Large hemorrhages cause paralysis and death.
771344
Yes cats do have brains - and yes that brain is located in the cat's head.  Most animals do, there are some exceptions like single celled protozoans and the hydra - and even the hydra has a primative nerve network. For the most part if it's not a plant and it's as big or bigger than a dust mite - it probably  has a brain - almost without exception the brain is in the 'head' part of the anatomy even in an earthworm - there is one end that has the "head" and mouth parts...\n\nWhat made you ask this question?