Download PDF by The Society for Neuroscience: Brain facts, a primer on the brain and nervous system

By The Society for Neuroscience

ISBN-10: 0607082348

ISBN-13: 9780607082340

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Indeed, 9 percent of Americans, more than 22 million people, abuse drugs on a regular basis. Recent estimates show that the abuse Deficit Hyperactivity Disorder of drugs, including alcohol and nicotine, costs the nation more than $276 billion each year. If continued long enough, drug abuse — often defined as harmful drug use — can eventually alter the very structure and chemical makeup of the brain, producing a true brain disorder. This disorder is called drug addiction or drug dependence. Drug addiction is characterized by a pathological desire for drugs, such that drugseeking and drug-taking behaviors occupy an inordinate amount of n Autism n Bipolar Disorder n Brain Tumors and terminating use, despite a stated desire to do so.

Recently, scientists have identified AD-associated mutations. The gene encoding the amyloid precursor protein (APP) is on chromosome 21. In other families with early-onset AD, mutations have been identified in the presenilin 1 and 2 genes. Genes that cause management of these cardiovascular risks can delay the onset or slow the progression of dementia. Amyotrophic lateral sclerosis This progressive disorder strikes more than 5,000 Americans dominant Alzheimer’s appear to do so by causing beta amyloid annually, with an average survival time of just three to five years plaques to accumulate.

Among the most powerful stressors are the same time, blood flow to the skin, kidneys, and digestive tract is psychological and psychosocial stressors that exist between mem- reduced, and supply to the muscles increases. In contrast, the para- bers of the same species. Lack or loss of control is a particu- sympathetic branch helps to regulate bodily functions and soothe larly important feature of severe psychological stress that can the body once the stressor has passed, preventing the body from have physiological consequences.

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Brain facts, a primer on the brain and nervous system by The Society for Neuroscience

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