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Related Concept Videos

Parkinson's Disease: Overview01:15

Parkinson's Disease: Overview

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 to...
Alzheimer's Disease: Overview01:26

Alzheimer's Disease: Overview

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 and tau...
Alzheimer Disease l: Introduction01:29

Alzheimer Disease l: Introduction

Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
Alzheimer Disease ll: Pathophysiology01:23

Alzheimer Disease ll: Pathophysiology

Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...
Parkinson Disease ll: Pathophysiology01:24

Parkinson Disease ll: Pathophysiology

Parkinson disease (PD) is a progressive neurodegenerative disorder primarily affecting movement, with additional non-motor features. Its pathophysiology involves complex interactions among genetic susceptibility, environmental exposures, and cellular dysfunction, including dopaminergic neuron loss, protein aggregation, and mitochondrial impairment.Selective NeurodegenerationA key feature is the degeneration of dopaminergic neurons in the substantia nigra pars compacta, leading to reduced...
Dementia l: Introduction01:22

Dementia l: Introduction

Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...

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Related Experiment Video

Updated: Jul 16, 2026

Sensitive Detection of Proteopathic Seeding Activity with FRET Flow Cytometry
12:31

Sensitive Detection of Proteopathic Seeding Activity with FRET Flow Cytometry

Published on: December 8, 2015

Pathways to primary neurodegenerative disease.

J Hardy1

  • 1Laboratory of Neurogenetics. National Institute on Aging, Bethesda, MD 20892, USA. hardyj@mail.nih.gov

Neurologia (Barcelona, Spain)
|October 25, 2002
PubMed
Summary

Neurodegenerative diseases, though distinct in origin, share common pathogenic pathways leading to cell death. Understanding these shared mechanisms is crucial for developing effective treatments for these debilitating conditions.

Area of Science:

  • Neurology
  • Pathology
  • Genetics

Background:

  • Neurodegenerative diseases represent a growing medical and social challenge.
  • Historically, these conditions were viewed as distinct clinicopathologic entities.
  • Recent advances challenge this view, suggesting shared underlying mechanisms.

Purpose of the Study:

  • To explore the common pathogenic mechanisms in neurodegenerative diseases.
  • To reconcile distinct etiologies with shared pathways of cell death.

Main Methods:

  • Review of genetic investigations.
  • Analysis of molecular pathologic tools.
  • Synthesis of current research on neurodegenerative disease pathogenesis.

Main Results:

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An Alternative Approach to Study Primary Events in Neurodegeneration Using Ex Vivo Rat Brain Slices
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Studying Pre-formed Fibril Induced α-Synuclein Accumulation in Primary Embryonic Mouse Midbrain Dopamine Neurons
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Studying Pre-formed Fibril Induced α-Synuclein Accumulation in Primary Embryonic Mouse Midbrain Dopamine Neurons

Published on: August 16, 2020

Related Experiment Videos

Last Updated: Jul 16, 2026

Sensitive Detection of Proteopathic Seeding Activity with FRET Flow Cytometry
12:31

Sensitive Detection of Proteopathic Seeding Activity with FRET Flow Cytometry

Published on: December 8, 2015

An Alternative Approach to Study Primary Events in Neurodegeneration Using Ex Vivo Rat Brain Slices
07:57

An Alternative Approach to Study Primary Events in Neurodegeneration Using Ex Vivo Rat Brain Slices

Published on: April 11, 2018

Studying Pre-formed Fibril Induced α-Synuclein Accumulation in Primary Embryonic Mouse Midbrain Dopamine Neurons
10:03

Studying Pre-formed Fibril Induced α-Synuclein Accumulation in Primary Embryonic Mouse Midbrain Dopamine Neurons

Published on: August 16, 2020

  • Evidence suggests shared molecular pathways in neurodegenerative diseases.
  • Despite diverse causes, common cellular damage processes are initiated.
  • Pathogenesis often converges on a limited number of cell death mechanisms.

Conclusions:

  • Neurodegenerative diseases, while etiologically diverse, converge on common pathogenic processes.
  • Shared mechanisms offer potential therapeutic targets.
  • Further research into these common pathways is warranted.