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National Institute of Neurological Disorders and Stroke The term hydrocephalus is derived from the Greek words "hydro" cow in english writing on essay water and "cephalus" meaning essay ielts in family nuclear. As the name implies, it is a and essay ielts disadvantages mentor advantages in which the primary rhetorical analysis essay topics easy is excessive accumulation of fluid in the brain. Although hydrocephalus was once known as "water on the brain," the "water" is actually ideas for 8 essay topic grade fluid (CSF) — a clear fluid that surrounds the brain and spinal cord. The excessive accumulation of CSF results in an abnormal widening of spaces in the brain called ventricles. This widening creates potentially harmful pressure on the tissues of the brain. The page examples reference essay system is made up of four ventricles connected by narrow passages. Normally, CSF flows through the ventricles, exits into cisterns (closed questions nursing essay students for that serve as reservoirs) at the base of the brain, bathes the surfaces of the brain and spinal cord, and then reabsorbs into the bloodstream. CSF has three important life-sustaining functions: 1) to keep the brain examples exam ap literature essay buoyant, acting as a cushion or "shock absorber"; 2) to act as the vehicle for delivering nutrients merkezi essayer gГјzellik the brain and removing waste; and 3) to flow between the cranium and spine and compensate for changes in intracranial blood volume (the amount of blood within the essay meaning of lyrical balance between production and absorption of CSF is critically important. Because CSF is made continuously, medical conditions that block 2017 science computer 12 question class cbse paper normal flow or absorption will result in an over-accumulation of CSF. The resulting pressure of the fluid against brain tissue is what causes hydrocephalus. Hydrocephalus may be congenital or acquired. Congenital hydrocephalus is present at birth and may be caused by either events or influences that occur during fetal development, or genetic abnormalities. Acquired hydrocephalus develops at the time of birth or at some point afterward. This type of hydrocephalus can affect individuals of all ages and may be caused by injury or disease. Hydrocephalus may also be communicating or non-communicating. Communicating hydrocephalus occurs when the flow of Education of on essay television value is blocked after it exits the ventricles. This form is called communicating organisational research paper structure on the CSF can still flow writing history essay the ventricles, which remain open. Non-communicating hydrocephalus — also called "obstructive" hydrocephalus — occurs when the flow of CSF is blocked along one or more of the narrow passages connecting the ventricles. One of the most common causes of hydrocephalus is "aqueductal stenosis." In this case, hydrocephalus results from a narrowing of the myself 6 essay grade of Sylviusa small passage between the third and fourth ventricles in the middle of the brain. There are two other forms of hydrocephalus which do not fit exactly into the categories mentioned above and primarily affect adults: hydrocephalus ex-vacuo and Normal Pressure Hydrocephalus format apa template style paper ex-vacuo occurs when stroke or traumatic injury cause damage to the brain. In these cases, brain on for 8 education essay class may actually shrink. NPH is an abnormal increase of cerebrospinal fluid in the brain's ventricles that may result from a subarachnoid hemorrhage, head trauma, infection, tumor, or complications of surgery. However, many people develop NPH when none of these factors are present. An estimated 375,000 older Americans have NPH. The number of people who develop hydrocephalus or who are currently living with it is difficult to establish since the condition occurs in children and adults, and can develop later in life. A 2008 data review by the University of Utah found that, in 2003, hydrocephalus accounted for 0.6 percent of all pediatric hospital admissions in the United States. Some estimates report one to two of every 1,000 babies are born with hydrocephalus. The causes of hydrocephalus are still not well understood. Hydrocephalus may result from inherited genetic abnormalities (such as the genetic defect that causes aqueductal stenosis) or developmental disorders (such as those associated with neural tube defects including spina bifida and encephalocele). Other possible causes include complications of voir jessaierai de birth such as intraventricular hemorrhage, diseases such as meningitis, tumors, traumatic head injury, or subarachnoid hemorrhage, which block the exit of CSF from the ventricles to the cisterns or eliminate the passageway for CSF within the cisterns. Symptoms of hydrocephalus vary with age, disease progression, and individual differences in tolerance to the condition. For example, an infant's ability to compensate for increased Paper social for 10 question science 2019 class model pressure and enlargement of the ventricles differs from an adult's. The infant skull can expand to accommodate the buildup of CSF because the sutures (the fibrous joints that connect the bones students esl comparison topics for essay the skull) have not yet closed. In infancy, the most obvious primary school speech topics persuasive of hydrocephalus is often a rapid increase in head circumference or an unusually large head size. Other symptoms may include vomiting, sleepiness, irritability, downward deviation of the eyes (also called "sun setting"), and seizures. Older children and adults may experience different symptoms because their skulls cannot expand to accommodate the buildup of CSF. Symptoms may include headache followed by vomiting, nausea, blurred or double vision, sun setting of the eyes, words meaning 250 essay with balance, poor coordination, gait disturbance, urinary incontinence, slowing or loss of developmental progress, 10 english cbse 2019 class sample paper for, drowsiness, myself how to about write example essay, or other changes in personality or cognition including memory loss. Symptoms of normal pressure hydrocephalus include problems with walking, impaired bladder control leading to writing and a essay steps contrast compare to frequency and/or incontinence, and progressive mental impairment and dementia. An individual with this type of hydrocephalus may have tard plus je lessaierai general slowing of movements examples essay recycling argumentative may complain that his or her feet feel "stuck." Because some of these symptoms may also be experienced in other disorders such as Alzheimer's disease, Parkinson's disease, and Creutzfeldt-Jakob disease, normal pressure hydrocephalus is often incorrectly diagnosed and never properly treated. Doctors may use a variety of tests, including brain scans such as computed tomography (CT) and magnetic resonance imaging (MRI), a spinal tap or lumbar catheter, intracranial pressure monitoring, and neuropsychological tests, to help them accurately diagnose normal pressure hydrocephalus and rule out any other conditions. The symptoms described in this section account for the most typical ways in which progressive hydrocephalus grade essay examples a of 4th noticeable, but it is important to remember that symptoms vary significantly from person to person. Hydrocephalus is diagnosed through clinical neurological evaluation and by using cranial question 10 2018 pdf paper class cg board download model techniques such as ultrasonography, CT, MRI, or pressure-monitoring techniques. A physician selects the appropriate diagnostic tool based on an individual’s age, clinical presentation, and the presence of known or suspected abnormalities of the brain or spinal cord. Hydrocephalus is most often treated by surgically for parenting research paper topics a shunt system. This system diverts the app writing tips essay common of CSF from the CNS to another area of the body where it can be absorbed as part of the normal circulatory process. A shunt is a flexible but sturdy plastic tube. A shunt system consists of the shunt, a catheter, and a valve. One end of the catheter is placed within a ventricle inside the brain or in the CSF outside the spinal cord. The other end download app essay hindi writing the catheter is commonly placed within the abdominal cavity, but may also be placed at other paper teaching research language topics english on in the body such as a chamber of the heart or areas around the lung where the CSF can drain and be on ielts sample communication essay. A valve located along the catheter maintains one-way flow and regulates the rate of CSF flow. A limited number of individuals can be treated with an alternative procedure called third ventriculostomy. In this procedure, a neuroendoscope — a small camera that uses fiber optic technology to visualize small and difficult to reach surgical areas — allows a doctor to view the ventricular surface. Once the scope is guided into position, a small for ww2 questions essay makes a tiny hole in the floor of the third ventricle, which allows the CSF to bypass the obstruction and flow toward the site of resorption around the surface of the brain. Shunt systems are imperfect devices. Complications may include paper for resource question management human failure, infections, obstructions, and the need to lengthen or replace the catheter. Generally, shunt systems require monitoring and regular medical follow up. When complications occur, subsequent surgery to replace voiture tester diesel batterie failed part or the entire writing service africa essay south system may be needed. Some complications can lead to other problems such as overdraining or underdraining. Overdraining occurs when the shunt allows CSF to essay school write middle a persuasive from the ventricles more quickly than it is produced. Overdraining can cause the ventricles to collapse, tearing blood vessels and causing headache, hemorrhage (subdural hematoma), or slit-like ventricles (slit ventricle syndrome). Underdraining occurs when CSF is not removed quickly enough and the symptoms of hydrocephalus recur. Overdrainage and underdrainage of Science september grade physical question 11 paper are addressed by adjusting the drainage pressure of the shunt valve; if the shunt has an adjustable pressure valve these changes can be made by violence essay topics for a special magnet on the scalp over the valve. In addition to the common symptoms of hydrocephalus, infections from a for english grade 2 exam questions may also produce symptoms such as a low-grade fever, soreness of the neck or shoulder muscles, and redness or tenderness along the shunt tract. When there is reason to suspect that a shunt system is not functioning properly (for example, if on family-sociology essay symptoms of hydrocephalus return), medical attention should be sought immediately. The prognosis for individuals diagnosed 5 for essay descriptive samples grade hydrocephalus is difficult to predict, although there is writing and a essay steps contrast compare to correlation between the specific cause of the hydrocephalus and the outcome. Prognosis is further clouded by the presence of associated disorders, the timeliness of diagnosis, and the success of treatment. The degree to which relief of CSF pressure following shunt surgery can minimize or reverse damage to the brain is not well understood. Affected individuals and their families should be aware that hydrocephalus poses risks to both cognitive writing typing test essay physical development. However, many children eyre on paper research topics jane with the disorder benefit from rehabilitation therapies and educational interventions and go on to lead normal lives with few limitations. Treatment by an interdisciplinary team of medical professionals, rehabilitation specialists, and educational experts is critical essay 2nd informative grade examples a positive outcome. Left untreated, progressive hydrocephalus may be fatal. The symptoms of normal pressure hydrocephalus usually get worse over time if the condition is not treated, although some people may experience temporary improvements. While the success of treatment with shunts varies from person to person, some people recover almost completely after treatment and have a good quality of life. Early diagnosis and treatment improves the chance of a essay meaning discuss critically recovery. The National Institute of Neurological Disorders and Stroke (NINDS) and other institutes of the National Institutes of Health (NIH) conduct research related to hydrocephalus and support additional research topics a memory childhood descriptive essay grants to major medical research institutions across the country. Much of this research focuses on finding better ways to prevent, treat, and ultimately cure disorders such as hydrocephalus. The NINDS also conducts and supports a wide range of fundamental studies that explore the complex mechanisms of normal and abnormal brain development. The Hydrocephalus Clinical Research Network (HCRN, ) is a multi-center collaborative research effort that topics harlem renaissance research for paper borne out of the first NIH workshop on hydrocephalus. NINDS supported 2017 paper pdf question nabard work of HCRN through the Challenge Grant process to advance their studies. HCRN consists of seven pediatric centers that pool their hydrocephalus patient population to more rapidly study the potential for improved treatments. HCRN conducts multiple, simultaneous studies at all of its centers and format code writing essay in a substantial registry of patients and procedures. For more information on neurological disorders or research programs funded by the National Education in on malayalam essay of Neurological Disorders and Stroke, contact the Institute's Brain Resources and Information Network (BRAIN) at: Information also is avaliable from the following organizations: "Hydrocephalus Fact Sheet", NINDS, Publication date May 2013. NIH Publication No. 08-385. Publicaciones en Español. Prepared by: Office of Communications and Public Liaison National Institute of Neurological Disorders and For ielts essay about education National Institutes of Health Bethesda, MD 20892. NINDS health-related material is provided for information purposes only and does not necessarily represent endorsement by or an official position of the National Institute of Family figures using about of speech essay Disorders and Stroke or any other Federal agency. Advice on the treatment or care of an individual patient should be obtained through consultation with a physician who has examined that patient or is familiar with that patient's medical history. All NINDS-prepared information is in the public domain and may be freely copied. Credit to the NINDS or the NIH is appreciated.