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1And as Jesus passed by, he saw a man which was blind from his birth.
2And his disciples asked him, saying, Master, who did sin, this man, or his parents, that he was born blind?
3Jesus answered, Neither hath this man sinned, nor his parents: but that the works of God should be made manifest in him.
Fixed cognitive impairment
Various types of brain injury, occurring as a single event, may cause irreversible but fixed cognitive impairment. Traumatic brain injury may cause generalized damage to the white matter of the brain (diffuse axonal injury), or more localized damage (as also may neurosurgery). A temporary reduction in the brain's supply of blood or oxygen may lead to hypoxic-ischemic injury. Strokes (ischemic stroke, or intracerebral, subarachnoid, subdural or extradural hemorrhage) or infections (meningitis and/or encephalitis) affecting the brain, prolonged epileptic seizures and acute hydrocephalus may also have long-term effects on cognition. Excessive alcohol use may cause alcohol dementia, Wernicke's encephalopathy and/or Korsakoff's psychosis, and certain other recreational drugs may cause substance-induced persisting dementia; once overuse ceases, the cognitive impairment is persistent but not progressive.
 Slowly progressive dementia
Dementia which begins gradually and worsens progressively over several years is usually caused by neurodegenerative disease; that is, by conditions affecting only or primarily the neurons of the brain and causing gradual but irreversible loss of function of these cells. Less commonly, a non-degenerative condition may have secondary effects on brain cells, which may or may not be reversible if the condition is treated.
The causes of dementia depend on the age at which symptoms begin. In the elderly population (usually defined in this context as over 65 years of age), a large majority of cases of dementia are caused by Alzheimer's disease, vascular dementia or both. Dementia with Lewy bodies is another fairly common cause, which again may occur alongside either or both of the other causes. Hypothyroidism sometimes causes slowly progressive cognitive impairment as the main symptom, and this may be fully reversible with treatment. Normal pressure hydrocephalus, though relatively rare, is important to recognize since treatment may prevent progression and improve other symptoms of the condition. However, significant cognitive improvement is unusual.
At this time, we do not yet know what causes Alzheimer's disease or how to stop its progression.
Researchers have discovered that Alzheimer's disease:
- is not a part of normal aging
-affects both men and women
-is more common in people as they age -- most people with the disease are over 65
-is not caused by hardening of the arteries
-is not caused by stress
-Scientists are looking at three areas:
For a few families, there is a definite connection between family history and Alzheimer's disease. While for others, a family history of Alzheimer's disease puts them at greater risk than someone with no family history. Though knowledge in this area is growing, the connection to heredity is not fully understood.
The external environment
The cause of Alzheimer's disease may be in our environment -- perhaps something in the water, soil or air.
The internal environment
Alzheimer's disease may be caused by something within the body. It could be a slow virus, an imbalance of chemicals or a problem with the immune system.
Researchers today believe there is no single cause of Alzheimer's disease. Instead, they believe it is caused by a combination of factors. There is still much that we don't know about the disease, but researchers continue to look for causes.
According to Pistis Sophia, some souls do experience hell as a shadowy place of torture where they go after death. But after passing through this hell, the souls return for further experiences on earth. Only a few extremely wicked souls are not allowed to reincarnate. These are cast into "outer darkness" until the time when they are destined to be "destroyed and dissolved".