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Related Concept Videos

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...
Parkinson Disease l: Introduction01:24

Parkinson Disease l: Introduction

Parkinson’s disease is a chronic, progressive neurodegenerative disorder that primarily affects movement. It is characterized by motor symptoms such as resting tremors, muscle rigidity, bradykinesia (slowness of movement), and postural instability. Patients may notice hand tremors at rest, stiffness during movement, or a shuffling gait. In addition to motor features, non-motor symptoms include sleep disturbances, mood and behavioral changes, constipation, and cognitive impairment, all of which...
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...
Parkinson's Disease: Treatment01:24

Parkinson's Disease: Treatment

Neurodegenerative disorders, such as Parkinson's Disease (PD), involve the gradual and irreversible destruction of neurons in particular brain areas. These disorders exhibit standard features like proteinopathies, selective vulnerability of some neurons, and an interaction of intrinsic properties, genetics, and environmental influences in neural injury.
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of its...
Alterations in Muscle Tone lll01:11

Alterations in Muscle Tone lll

Rigidity and myotonia are distinct abnormalities of muscle tone that affect resistance and relaxation during movement. Although both involve altered muscle contraction, they arise from different neurological and muscular mechanisms.CharacteristicsRigidity is characterized by uniform resistance to passive movement across the entire range, independent of speed, affecting flexors and extensors equally. It may appear as lead-pipe rigidity (smooth, constant resistance) or cogwheel rigidity...
Mitochondria01:37

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...

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Updated: May 30, 2026

Histological Examination of Mitochondrial Morphology in a Parkinson's Disease Model
06:07

Histological Examination of Mitochondrial Morphology in a Parkinson's Disease Model

Published on: June 23, 2023

[Mitochondrial disfunction in Parkinson's disease].

O A Buneeva, A E Medvedev

    Biomeditsinskaia Khimiia
    |August 26, 2011
    PubMed
    Summary

    Mitochondrial dysfunction is a key factor in Parkinson's disease (PD). Research highlights enzyme inactivation, DNA mutations, and protein changes in PD and animal models, offering insights into disease mechanisms.

    Area of Science:

    • Biochemistry
    • Neuroscience
    • Genetics

    Context:

    • Parkinson's disease (PD) is a neurodegenerative disorder.
    • Mitochondrial dysfunction is increasingly recognized as a central pathological feature in PD.

    Purpose:

    • To review and synthesize current knowledge on mitochondrial structural and functional abnormalities in Parkinson's disease.
    • To examine evidence from both human patients and experimental animal models of parkinsonism.

    Summary:

    • Abnormalities in mitochondrial structure and function are evident in Parkinson's disease.
    • Key findings include the inactivation of critical mitochondrial enzymes.
    • Mutations in both mitochondrial DNA (mtDNA) and nuclear DNA contribute to mitochondrial defects.
    • Genomic and proteomic studies reveal alterations in mitochondrial proteins associated with PD.

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    The Use of Primary Human Fibroblasts for Monitoring Mitochondrial Phenotypes in the Field of Parkinson's Disease
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    The Use of Primary Human Fibroblasts for Monitoring Mitochondrial Phenotypes in the Field of Parkinson's Disease

    Published on: October 3, 2012

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    Last Updated: May 30, 2026

    Histological Examination of Mitochondrial Morphology in a Parkinson's Disease Model
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    Published on: June 23, 2023

    The Use of Primary Human Fibroblasts for Monitoring Mitochondrial Phenotypes in the Field of Parkinson's Disease
    15:09

    The Use of Primary Human Fibroblasts for Monitoring Mitochondrial Phenotypes in the Field of Parkinson's Disease

    Published on: October 3, 2012

    Impact:

    • Understanding these mitochondrial defects provides crucial insights into Parkinson's disease pathogenesis.
    • This knowledge can guide the development of novel therapeutic strategies targeting mitochondrial dysfunction in PD.