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Free research papers and essays on topics related to: tomography

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  • Alzheimers Disease - 1,694 words
    Alzheimer's Disease Alzheimer's Disease With all of the advanced technology that the medical field possesses today, there is still suffering that occurs from incurable diseases. Alzheimer's Disease is one of those incurable diseases that take the lives of many today. This paper will examine this disease thoroughly by looking at its definition, and discussing general information, facts, and figures. The cause of Alzheimer's Disease, and the much thought about question of if it is genetic or not will disputed. Also the symptoms, diagnosis, and treatment of Alzheimer's Disease will be addressed. Included will also be tips on how to make the life of an Alzheimer's patient easier. What is Alzheim ...
    Related: alois alzheimer, alzheimer's disease, alzheimers disease, heart disease, nursing home
  • Brain Scans Show Pattern In Violent Behavior - 485 words
    Brain Scans Show Pattern In Violent Behavior Murderers and other people prone to violence have distinct brain patterns that can be scanned and that might be changed with drugs and other therapies, researchers said. Most people's brain can rein in overreaction to emotions such as fear or anger. But in pathologically violent people, this control system gets short-circuited. Several studies have shown this rewiring can be seen in images such as PET(positron emission tomography) scans. Impulsive,affective aggression may be the product of a failure of emotion regulation, University of Wisconsin-Madison psychologist Richard Davidson and colleagues wrote in their report, published in journal scienc ...
    Related: brain, violent behavior, research center, positron emission tomography, adaptive
  • Dementiaa - 3,961 words
    ... re senile plaques (SP) and Neurofibrillary tangles (NFT). There are two types of SP, neuritic and diffuse, both plaques share antigenic determinants with the Beta amyloid 4 protein. Neuritic plaques can be distinguished by their abnormally thickened neurites ( i.e., axons or dendrites) arranged around a central core of amyloid (Mirra & Gearing, 1994). By contrast the diffuse plaques lack the thickened neurites and the amyloid core seen in the neuritic plaques (Mirra & Gearing, 1994). Plaques of both types are found in varying degrees in the neocortex, entorhinal cortex, hippocampus, and in the amygdala. SP also occur in the brains of healthy people. It is only when they exceed a certain ...
    Related: cerebral cortex, nervous system, carbon dioxide, 1984, diagnosis
  • Lumbar Disc Problems - 1,664 words
    ... ion of the origin of the pain. The goal is to reduce inflammation in the foramen through direct application of strong anti inflammatory medications. This option is not very popular for the obvious reason that the prospect of injection is intimidating to most people. The overall success of the injections is generally short lived with most symptoms returning within three to four days. Long term relief from epidural injections, for more than three months, is only gained in under five percent of the recipients(Traynellis, 1997). The persistent nature of lumbar disc injury is such that it affects every aspect of a persons life from tying one's sneakers to getting in and out of a car, to stand ...
    Related: disc, lumbar, problems associated, magnetic resonance, resonance imaging
  • Lung Cancer - 1,649 words
    Lung Cancer Lung cancer is not just one disease but rather a group of diseases. All forms of cancer cause cells in the body to change and grow out of control. Most types of cancer cells form a lump or mass called a tumor. Cells from the tumor can break away and travel to other parts of the body where they can continue to grow. This spreading process is called metastasis. When cancer spreads, it is still named after the part of the body where it started. For example, if breast cancer spreads to the lungs, it is still breast cancer, not lung cancer. Another word for cancerous is malignant, so a cancerous tumor is referred to as malignant. But not all tumors are cancer. A tumor that is not canc ...
    Related: american cancer, breast cancer, cancer, cancer society, lung, lung cancer
  • Medical Devices Fda - 1,140 words
    Medical Devices FDA Magnetic Resonance division designs, manufactures, and installs MRI systems and associated equipment for the worldwide medical diagnostic imaging market. In addition, Marconi MR imports MRI systems from Nordstar (located in Helsinki, Finland) and installs them in the United States. Associated equipment includes surface coils and physician viewing stations. Surface coils are specialized transducers, which, when used with an MRI machine, produce high-quality images of specific portions of the anatomy. MR designs, manufactures, and installs surface coils as well. Marconi Medical Systems as a whole, is a transnational corporation. While retaining its strength in the United St ...
    Related: medical device, federal regulations, product information, drug administration, spectroscopy
  • Medical Ethics - 1,445 words
    ... conditions or not, but that is the problem with written guidelines, they work on paper, but not necessarily in life (Levine 173). Must we experiment on human beings? If so, what human experiment categories are ethically correct? Human experimentation falls into three divisions, the first of which is, ? Experiments that the researcher carries out on him or herself ? (Weiss 34). A traditionally excepted example of this was conducted over one-hundred years ago by a scientist set on disproving the fact germs cause disease, The way he decided to prove his idea was to swallow a beakerful of cholera germs. However, he had a natural immunity to cholera; he did not become ill. It was concluded t ...
    Related: ethics, medical ethics, medical profession, medical science, medical technology
  • Obsessive Compulsive Disorder - 1,780 words
    Obsessive Compulsive Disorder Are you the type of person who has a phobia of germs, dirt, or contaminated bodily fluids? Is the only way to feel safe and pure is for you to cleanse yourself countless times a day? Or maybe you`re the type of person who has to check things twice, three times or more. Perhaps you`re the type of person who has to do everything twice, or by a fixed number. Maybe you are the type of person who must have everything neatly placed, and if misplaced at all you throw a tantrum. If you are a person who happens to do any of these things then maybe you have OCD, the acronym for Obsessive-Compulsive Disorder. Obsessive-Compulsive Disorder (formerly known as obsessive neuro ...
    Related: anxiety disorder, compulsive, compulsive behavior, compulsive disorder, disorder, obsessive, obsessive compulsive disorder
  • Radiology - 1,878 words
    Radiology Radiology Humanity, constantly learning, growing, and facing more challenges each second of the day. Whether the challenges are mental or purely physical. We have found more efficient, safer, and easier ways of doing the tasks we may face. From moving cargo, to sending information via the Internet. Probably the greatest accomplishments we have made, are in the studies of medicine/treatment. And to be specific, the study of radiology. Radiology, the process of working and viewing inside the human body without breaking the skin. By using radiant energy, which may take the form of x rays or other types of radiation, we are able to diagnose and treat many diseases and injuries. Both di ...
    Related: radiology, magnetic resonance, brain tumor, gunshot wounds, generate
  • Review Of Amygdala Activity At Correlated With Longterm, Free Recall Of Emotional Information - 588 words
    Review of Amygdala activity at correlated with long-term, free recall of emotional information This article reviewed an experiment that tested the role of the amygdala in emotional memory. To be specific it hypothesized that if the amygdaloid complex (AC) was primarily involved with the formation of long-term memory during emotionally arousing situations, then the PET analysis would reveal AC activity related to retention of the relative emotional, but not relatively neutral, films. The experiment used eight right-handed male subjects between 20 and 24 years old. While at first it was not clearly stated why the subjects used were all the same, but women, left-handed people, and subjects of d ...
    Related: amygdala, recall, long term memory, good idea, omitted
  • Spiral Ct Lung Screening - 1,671 words
    SPIRAL CT LUNG SCREENING AT DESERT RADIOLOGISTS By Linda Robert Marilyn Raquel Mike MKT 438 Instructor: Kelly Wood July 19, 2000 HISTORY OF DETECTING LUNG CANCER Lung cancer affects more than 170,000 men and women each year. Currently, there isnt a practical or definitive screening method for detecting this disease. Historically, chest x-rays were used to detect cancer when patients presented symptoms. Though chest x-rays can pick up cancerous lesions, it has not been recommended as a routine annual screening tool because it often detects the disease too late when cure is difficult. By the time lung cancer is large enough to be visible on chest x-rays, it is often advanced and may have alrea ...
    Related: lung, lung cancer, screening, spiral, health care
  • Superconductivity - 1,479 words
    ... rical current better in one direction. Some high-temperature superconductors can carry current 30 times faster in one direction than in another direction (Simon and Smith 1988, p 102). The Josephson effect. Another interesting property of superconductors is the Josephson effect. The Josephson effect is based on an occurrence called tunneling. Tunneling occurs when a thin oxide barrier is squeezed between 2 superconductors (Simon and Smith 1988, p 129). The 2 superconductors are coupled together and the current through them is measured. When the superconductors are exposed to different magnetic fields and radiation, the current flow sometimes changes because electrons jump through the oxi ...
    Related: albert einstein, manufacturing process, recent studies, underground, travel
  • The Human Brain - 1,797 words
    The Human Brain The human being is considered to be the ultimate form of life on the earth. This is not because the human body is strong and agile. Many other animals posses skills much superior to humans and are able to perform feats humans can only dream of. The one thing that distinguishes humans from all of the other organisms on this planet is the brain. The brain is the site that controls the human body. However, unlike in animals, in man, the brain is also the site of the mind. The mind gives humans superiority over other creatures. It provides humans with the ability to reason, to feel and to adapt. Because of this, man has achieved so much, and has also realized that much more is st ...
    Related: brain, human behavior, human beings, human body, human brain
  • Volcano Mount Vesuvius - 1,492 words
    Volcano Mount Vesuvius Mount Vesuvius is a volcano located in southern Italy, near the bay of Naples and the city of Naples. It is the only active volcano on the European mainland. Vesuvius rises to a height of 1277 m (4190 ft). Vesuvio (Vesuvius) is probably the most famous volcano on earth, and is one of the most dangerous. Mount Vesuvius is a strato-volcano consisting of a volcanic cone (Gran Cono) that was built within a summit caldera (Mount Somma). The Somma-Vesuvius complex has formed over the last 25,000 years by means of a sequence of eruptions of variable explosiveness, ranging from the quiet lava outpourings that characterized much of the latest activity (for example from 1881 to ...
    Related: active volcano, mount, mount vesuvius, volcano, most dangerous
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