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Related Concept Videos

Dementia01:30

Dementia

139
Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
The progression of dementia is generally gradual....
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Alzheimer's Disease: Overview01:26

Alzheimer's Disease: Overview

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Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
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Parkinson's Disease: Overview01:15

Parkinson's Disease: Overview

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Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
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Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders

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Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within...
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Disorders of the Nervous Tissue01:28

Disorders of the Nervous Tissue

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Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
Homeostatic Imbalances:
Alzheimer's disease manifests as a gradual decline in memory and cognitive abilities, attributed to the buildup of amyloid plaques and neurofibrillary tangles in the brain.
Parkinson's disease arises from the...
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Alzheimer's Disease: Treatment01:22

Alzheimer's Disease: Treatment

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Alzheimer's Disease (AD), a neurodegenerative disorder, is pathologically identified by amyloid plaques and neurofibrillary tangles composed of tau protein. AD pharmacotherapy aims to manage cognitive symptoms, delay disease progression, and treat behavioral symptoms. The treatment is primarily symptomatic and palliative, with no definitive disease-modifying therapy available. Cholinesterase inhibitors, including donepezil (Aricept), rivastigmine (Exelon), and galantamine (Razadyne), are...
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Related Experiment Video

Updated: Jul 20, 2025

Symmetric Bihemispheric Postmortem Brain Cutting to Study Healthy and Pathological Brain Conditions in Humans
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Pathophysiology of dementia.

Kai Sin Chin1

  • 1MBBS, Consultant Geriatrician, Department of Aged Care, The Royal Melbourne Hospital, Melbourne, Vic; Clinical Research Fellow, Population Health and Immunity Division, the Walter and Eliza Hall Institute of Medical Research, Melbourne, Vic.

Australian Journal of General Practice
|August 2, 2023
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Summary

Dementia, a major public health concern, involves complex neurobiology. Understanding the pathophysiology of common dementia types like Alzheimer's disease is crucial for developing effective treatments and biomarkers.

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Last Updated: Jul 20, 2025

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Area of Science:

  • Neurology
  • Neuroscience
  • Pathophysiology

Background:

  • Dementia is a significant global health issue affecting millions.
  • Understanding dementia's neurobiology and pathophysiology is key to treatment development.

Purpose of the Study:

  • To review the pathophysiology of common late-onset dementias.
  • To highlight advances in dementia biomarker research.

Main Methods:

  • Literature review of pathophysiological processes in dementia.
  • Overview of common dementia types: Alzheimer's disease, dementia with Lewy bodies, vascular dementia, and frontotemporal dementia.

Main Results:

  • Dementia pathophysiology involves protein misfolding (e.g., amyloid-β plaques, neurofibrillary tangles) and cerebrovascular disease.
  • Mixed neuropathologies are common in older adults with dementia and have clinical significance.

Conclusions:

  • Continued research into dementia pathophysiology and biomarkers is essential.
  • Understanding mixed neuropathologies may improve clinical management and treatment strategies.