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Early-onset Alzheimer's disease strikes earlier in life, defined as before the age of 65 (usually between 30 and 60 years of age). [medical citation needed] Early signs of AD include unusual memory loss, particularly in remembering recent events and the names of people and things (logopenic primary progressive aphasia).
Cerebral atrophy is a common feature of many of the diseases that affect the brain. [1] Atrophy of any tissue means a decrement in the size of the cell, which can be due to progressive loss of cytoplasmic proteins. In brain tissue, atrophy describes a loss of neurons and the connections between them.
Episodic memory (remembering specific events) declines gradually from middle age, while semantic memory (general knowledge and facts) increases into early old age and then declines thereafter. [9] Older adults can exhibit reduced activity in specific brain regions during cognitive tasks, particularly in medial temporal areas related to memory ...
Neurodegenerative diseases include amyotrophic lateral sclerosis, multiple sclerosis, Parkinson's disease, Alzheimer's disease, Huntington's disease, multiple system atrophy, tauopathies, and prion diseases. Neurodegeneration can be found in the brain at many different levels of neuronal circuitry, ranging from molecular to systemic. [4]
In this Special Feature, we explore the most recent research on how exercise can protect brain health as we age. Recent studies examine the ways in which exercise helps prolong the health span ...
One study found that in the United States, the prevalence of vascular dementia in all people over the age of 71 is 2.43%, and another found that the prevalence of the dementias doubles with every 5.1 years of age. [citation needed] The incidence peaks between the fourth and the seventh decades of life and 80% of people have a history of ...
In 2010, experiments that have tested for the significance of under-performance of memory for an older adult group as compared to a young adult group, hypothesized that the deficit in associate memory due to age can be linked with a physical deficit. This deficit can be explained by the inefficient processing in the medial-temporal regions.
Subdural hygromas require two conditions in order to occur. First, there must be a separation in the layers of the Meninges of the brain. Second, the resulting subdural space that occurs from the separation of layers must remain uncompressed in order for CSF to accumulate in the subdural space, resulting in the hygroma. [1]