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Nystagmus. Nystagmus is a condition of involuntary (or voluntary, in some cases) [1] eye movement. [2] People can be born with it but more commonly acquire it in infancy or later in life. In many cases it may result in reduced or limited vision. [3] In normal eyesight, while the head rotates about an axis, distant visual images are sustained by ...
It is located above the brain stem, posterior to the brain. Cerebellar degeneration is a condition in which cerebellar cells, otherwise known as neurons, become damaged and progressively weaken in the cerebellum. [1] There are two types of cerebellar degeneration; paraneoplastic cerebellar degeneration, and alcoholic or nutritional cerebellar ...
Show comments. Some 4% of U.S. adults aged 65 and older say they have been diagnosed with dementia, a rate that reached 13% for those at least 85-years old, according to a report of a national ...
Gerstmann–Sträussler–Scheinker syndrome. A person with inherited prion disease has cerebellar atrophy. This is quite typical of GSS. difficulty speaking, developing dementia, memory loss, vision loss. Gerstmann–Sträussler–Scheinker syndrome ( GSS) is an extremely rare, always fatal (due to it being caused by prions) neurodegenerative ...
A neurodegenerative diseaseis caused by the progressive loss of neurons, in the process known as neurodegeneration. [2][3]Neuronal damage may also ultimately result in their death. Neurodegenerative diseases include amyotrophic lateral sclerosis, multiple sclerosis, Parkinson's disease, Alzheimer's disease, Huntington's disease, multiple system ...
Dementia affects 5% of the population older than 65 and 20–40% of those older than 85. [266] Rates are slightly higher in women than men at ages 65 and greater. [ 266 ] The disease trajectory is varied and the median time from diagnosis to death depends strongly on age at diagnosis, from 6.7 years for people diagnosed aged 60–69 to 1.9 ...
A concussion is a mild form of traumatic brain injury, or TBI. It occurs when the skull and brain are rapidly jolted back and forth. This is usually the result of a bump, bang, or blow to the head ...
Mild cognitive impairment ( MCI) is a neurocognitive disorder which involves cognitive impairments beyond those expected based on an individual's age and education but which are not significant enough to interfere with instrumental activities of daily living. [ 1] MCI may occur as a transitional stage between normal aging and dementia ...