T events. Severe deficiency of vitamin b3 can cause a neurological illness called pellagra that may include dementia. Deficiencies of vitamin b12 also have been linked to dementia in some cases. Dehydration can also cause mental impairment that can resemble dementia. Infections. Many infections can cause neurological symptoms, including confusion or delirium, due to fever or other side effects of the body's fight to overcome the infection. Meningitis and encephalitis, which are infections of the brain or the membrane that covers it, can cause confusion, sudden severe dementia, withdrawal from social interaction, impaired judgment, or memory loss. Untreated syphilis also can damage the nervous system and cause dementia. In rare cases, lyme disease can cause memory or thinking difficulties. People in the advanced stages of aids also may develop a form of dementia (see hiv-associated dementia, page 14). People with compromised immune systems, such as those with leukemia and aids, may also develop an infection called progressive multifocal leukoencephalopathy (pml). Pml is caused by a common human polyomavirus, jc virus, and leads to damage or destruction of the myelin sheath that covers nerve cells. Pml can lead to confusion, difficulty with thinking or speaking, and other mental problems. Subdural hematomas. Subdural hematomas, or bleeding between the brain's surface and its outer covering (the dura), can cause dementia-like symptoms and changes in mental function. Poisoning. Exposure to lead, other heavy metals, or other poisonous substances can lead to symptoms of dementia. These symptoms may or may not resolve after treatment, depending on how badly the brain is damaged. People who have abused substances such as alcohol and recreational drugs sometimes display signs of dementia even after the substance abuse has ended. This condition is known as substance-induced persisting dementia. Brain tumors. In rare cases, people with brain tumors may develop dementia because of damage to their brains. Symptoms may include changes in personality, psychotic episodes, or problems with speech, language, thinking, and memory. Anoxia. Anoxia and a related term, hypoxia, are often used interchangeably to describe a state in which there is a diminished supply of oxygen to an organ's tissues. Anoxia may be caused by many different problems, including heart attack, heart surgery, severe asthma, smoke or carbon monoxide inhalation, high-altitude exposure, strangulation, or an overdose of anesthesia. In severe cases of anoxia the patient may be in a stupor or a coma for periods ranging from hours to days, weeks, or months. Recovery depends on the severity of the oxygen deprivation. As recovery proceeds, a variety of psychological and neurological abnormalities, such as dementia or psychosis, m. buy generic viagra cheap viagra floridalighttacklecharters.com/thq-buy-viagra-canada-uk/ cheap viagra buy cheap viagra cheap viagra online cheap generic viagra buy generic viagra viagra without a doctor prescription buy cheap viagra brain viagra pillFine Art Oil Paintings

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