Water makes up about 80% of the brain and is an essential element in neurological transmissions. Poor hydration adversely affects a child's mental performance and learning ability. Symptoms of mild dehydration may include tiredness, headaches and a feeling not unlike jet lag, as well as reduced alertness and ability to concentrate. Mental performance including memory, attention and concentration can decrease by about 10 per cent, once thirst is felt.

The use of crack alters the processes of the brain by causing a change in the way neurons in the brain communicate. Nerve cells, called neurons, communicate with each other by supplying the brain with chemicals called neurotransmitters. These neurotransmitters allow information in the form of electrical impulses to be passed through the body. This process works by neurotransmitters attaching themselves to certain areas in the brain. See similar questions...

Through the use of sophisticated technology, scientists can actually see the dynamic changes that occur in the brain as an individual takes cocaine. They can observe the different brain changes that occur as a person experiences the "rush," the "high," and finally the craving of cocaine. They can also identify parts of the brain that become active when a cocaine addict sees or hears environmental stimuli that trigger the craving for cocaine. See similar questions...

The lack of adequate body fluids needed for the body to carry on normal functions at an optimal level. Dehydration can be caused by fluid loss (through vomiting, diarrhea or excessive urination), inadequate intake, or a combination of both. The most common cause of dehydration in infants and children is acute gastroenteritis with its associated vomiting and diarrhea. Dehydration is classified as mild, moderate, or severe based on the percentage of body weight lost during the acute illness. See similar questions...

With "functional Magnetic Resonance Imaging" (fMRI), it is shown that, when dyslexics are taught to read fluently using synthetic phonics, they develop the use of the same pathways in the brain as normal fluent readers. See similar questions...

If you suspect that you or your child is dehydrated, call the doctor immediately. Severe dehydration may require hospitalization. See similar questions...

People with serious forms of anxiety demonstrate chronic over-activity in the areas of the brain associated with fear or nervousness. An inhibitory neurotransmitter, gamma aminobutyricacid (GABA) works in these areas to diminish this excessive nerve cell activity. There is evidence that benzodiazepines cause an increase in the activity of GABA, thereby returning the system to a normal level and reducing the associated symptoms of anxiety. See similar questions...

The model will not replace experiments, but it will allow experiments to be much more focused and better optimized. In a sense the model can be used to design the ideal experiment and then test the experiment before moving to a final version animal experiments. So it will definitely save the slow road of trial and error and exploration in animal experiments. See similar questions...

In Washington, initiatives take effect 30 days after they are voted on unless otherwise specified by the initiative. This means I-692 went into effect on December 3, 1998. See similar questions...

Some women have reported that their RP has progressed more rapidly during pregnancy than it ever had previously. However, because RP is rare, this issue is difficult to study in a systematic way. If you are pregnant, or thinking of becoming pregnant, you should make sure that your obstetrician/gynecologist is aware of your eye problems, and that your eye care professional knows of your pregnancy. See similar questions...

Your free trial registration will take place immediately. Should you decide to become a full-fledged subscriber to the iPOLL system, you will need to contact iPOLL Customer Services at 860-486-4440 to upgrade your subscription status. See similar questions...

Very gradually, the inside of the tipi, above the fire, will get dark as the fabric absorbs the pigments from the smoke. However, the tannic acid and oils in the smoke has a tendency to "tan" and "season" the cover and make it more waterproof and more resistant to deterioration. The Indians would usually build a fire with green wood in a new "skin" tipi to saturate the tipi surface with smoke. See similar questions...

I see some patients wearing rings around their legs. Does it hurt and how long do they have to be kept. See similar questions...

If you mail or fax your application to us, your coverage will be effective on the day after postmark if mailed, or the day after you fax it to us. See similar questions...

Causes of dehydration include excessive fluid losses due to excessive sweating, inadequate fluid intake, or a combination of these factors. See similar questions...