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Related Concept Videos

Parkinson's Disease: Overview01:15

Parkinson's Disease: Overview

1.5K
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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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: 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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Biological Causes of Schizophrenia01:29

Biological Causes of Schizophrenia

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Schizophrenia, a severe psychiatric disorder, arises from a complex interplay of biological factors, including genetic predisposition, structural brain abnormalities, neurotransmitter dysregulation, and developmental irregularities. These factors collectively contribute to the onset and progression of the disorder, which typically manifests in late adolescence or early adulthood.
Genetic Factors in Schizophrenia
The genetic basis of schizophrenia is strongly supported by family and twin...
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Amyloid Fibrils03:03

Amyloid Fibrils

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Amyloid fibrils are aggregates of misfolded proteins.  Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils. 
Amyloid deposits were observed as early as 1639 in the liver and the spleen.   In 1854, Rudolph Virchow performed iodine staining,...
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Neural Regulation01:37

Neural Regulation

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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Related Experiment Video

Updated: Dec 13, 2025

Analyzing the Parkinson's Disease Mouse Model Induced by Adeno-associated Viral Vectors Encoding Human α-Synuclein
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Analyzing the Parkinson's Disease Mouse Model Induced by Adeno-associated Viral Vectors Encoding Human α-Synuclein

Published on: July 29, 2022

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What causes neurodegenerative disease?

Richard Armstrong1

  • 1Vision Sciences, Aston University, Birmingham, United Kingdom.

Folia Neuropathologica
|July 31, 2020
PubMed
Summary

Neurodegenerative diseases arise from multiple cumulative risk factors over a lifetime, leading to protein misfolding and spread along neural pathways. Lifestyle choices can influence disease risk and progression.

Area of Science:

  • Neuroscience
  • Pathology
  • Gerontology

Background:

  • Neurodegenerative diseases present diverse phenotypes and complex pathologies.
  • Current understanding struggles to fully explain the heterogeneity of these conditions.

Purpose of the Study:

  • To propose a unifying hypothesis for the pathogenesis and phenotypic diversity of neurodegenerative diseases.
  • To integrate the roles of aging, risk factors, and protein propagation in disease development.

Main Methods:

  • The study proposes a hypothesis based on seven key propositions.
  • It integrates concepts of allostatic load, neural aging, and prion-like protein spread.
  • The hypothesis considers interactions between genetic and environmental risk factors.
Keywords:
agingallostatic loadcell to cell transfer.hypothesisneurodegenerative disease

More Related Videos

Modeling Age-Associated Neurodegenerative Diseases in Caenorhabditis elegans
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Modeling Age-Associated Neurodegenerative Diseases in Caenorhabditis elegans

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Human Neural Organoids for Studying Brain Cancer and Neurodegenerative Diseases
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Human Neural Organoids for Studying Brain Cancer and Neurodegenerative Diseases

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Related Experiment Videos

Last Updated: Dec 13, 2025

Analyzing the Parkinson's Disease Mouse Model Induced by Adeno-associated Viral Vectors Encoding Human α-Synuclein
14:45

Analyzing the Parkinson's Disease Mouse Model Induced by Adeno-associated Viral Vectors Encoding Human α-Synuclein

Published on: July 29, 2022

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Modeling Age-Associated Neurodegenerative Diseases in Caenorhabditis elegans
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Modeling Age-Associated Neurodegenerative Diseases in Caenorhabditis elegans

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Human Neural Organoids for Studying Brain Cancer and Neurodegenerative Diseases
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Main Results:

  • Neurodegenerative disease pathogenesis is multifactorial, influenced by cumulative lifetime risk factors and allostatic load.
  • Aging differentially impacts neuro-anatomical pathways, leading to pathogenic protein formation.
  • Pathogenic proteins spread along neural pathways, contributing to varied disease phenotypes and pathology.

Conclusions:

  • The proposed hypothesis explains the heterogeneity, overlapping phenotypes, and multiple pathologies observed in neurodegenerative diseases.
  • Reducing allostatic load and promoting cognitive and physical activity may mitigate disease incidence.