Dementia is any decline in cognition this is full-size enough to interfere with unbiased, day by day functioning. Dementia is pleasant characterised as a syndrome as opposed to as one precise disorder. The causes of dementia are myriad and include primary neurologic, neuropsychiatric, and scientific situations. It is commonplace for more than one diseases to make contributions to anyone affected person's dementia syndrome. Neurodegenerative dementias, like Alzheimer sickness and dementia with Lewy our bodies, are maximum common within the elderly, even as worrying brain harm and brain tumors are not unusual reasons in more youthful adults. While the current decade has seen sizable advancements in molecular neuroimaging, in knowledge clinico-pathologic correlation, and in the development of novel biomarkers, clinicians nevertheless anticipate ailment-modifying healing procedures for neurodegenerative dementias.