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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...
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...
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...
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: 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...
Disorders of the Autonomic Nervous System01:18

Disorders of the Autonomic Nervous System

The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
Raynaud's disease, also known as Raynaud's phenomenon, is a...

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Related Experiment Video

Updated: Jun 8, 2026

Rating L-DOPA-Induced Dyskinesias in the Unilaterally 6-OHDA-Lesioned Rat Model of Parkinson's Disease
06:45

Rating L-DOPA-Induced Dyskinesias in the Unilaterally 6-OHDA-Lesioned Rat Model of Parkinson's Disease

Published on: October 4, 2021

Multi-organ autonomic dysfunction in Parkinson disease.

Samay Jain1

  • 1Clinical Director, Movement Disorders Division, Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, PA 15213-3232, USA. jains@upmc.edu

Parkinsonism & Related Disorders
|September 21, 2010
PubMed
Summary

Parkinson disease (PD) is a widespread neurodegenerative disorder affecting multiple organ systems, not just movement. Autonomic physiology offers insights into non-motor PD progression and potential treatments.

Related Experiment Videos

Last Updated: Jun 8, 2026

Rating L-DOPA-Induced Dyskinesias in the Unilaterally 6-OHDA-Lesioned Rat Model of Parkinson's Disease
06:45

Rating L-DOPA-Induced Dyskinesias in the Unilaterally 6-OHDA-Lesioned Rat Model of Parkinson's Disease

Published on: October 4, 2021

Area of Science:

  • Neurology
  • Autonomic Neuroscience

Background:

  • Parkinson disease (PD) is increasingly recognized beyond its motor symptoms.
  • Non-motor features involve widespread neurodegeneration affecting multiple organ systems.

Purpose of the Study:

  • To integrate neuropathologic findings and autonomic physiology in Parkinson disease.
  • To explore the role of autonomic dysfunction in PD progression and treatment.

Main Methods:

  • Review of neuropathologic studies and autonomic physiology research.
  • In vivo assessment of autonomic anatomy and function using non-invasive techniques.
  • Examination of end-organ systems including cardiovascular, skin, urinary, gastrointestinal, pupillary, and neuroendocrine.

Main Results:

  • Evidence suggests PD affects a chain of neurons within autonomic pathways.
  • Autonomic dysfunction is a significant component of PD's multi-systemic impact.
  • End-organ physiologic markers reflect PD pathophysiology and non-motor progression.

Conclusions:

  • Autonomic physiology provides a window into non-motor Parkinson disease progression.
  • Understanding autonomic pathways is crucial for developing mechanistically based treatments for PD's non-motor features.
  • End-organ markers can inform models of PD pathophysiology.