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Related Concept Videos

Alterations in Muscle Tone ll01:12

Alterations in Muscle Tone ll

Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...
Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin01:26

Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin

Directly acting muscle relaxants like dantrolene and botulinum toxin (BoNT) have distinct mechanisms and applications. Dantrolene, a hydantoin derivative, acts on the ryanodine receptor (RYR1) in skeletal muscle cells. RYR1 are calcium channels present at the sarcoplasmic reticulum membrane. In response to excitation, they release calcium ions from the sarcoplasmic reticulum to the cytosol. Calcium promotes actin-myosin-mediated contraction of muscles.
The binding of dantrolene to the RYR1...
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'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...
Myasthenia Gravis ll: Pathophysiology01:22

Myasthenia Gravis ll: Pathophysiology

The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...

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Related Experiment Video

Updated: May 9, 2026

Implantation of Osmotic Pumps and Induction of Stress to Establish a Symptomatic, Pharmacological Mouse Model for DYT/PARK-ATP1A3 Dystonia
10:41

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Published on: September 12, 2020

Emerging common molecular pathways for primary dystonia.

Mark S Ledoux1, William T Dauer, Thomas T Warner

  • 1Department of Neurology, University of Tennessee Health Science Center Memphis, Tennessee 38163, USA.

Movement Disorders : Official Journal of the Movement Disorder Society
|July 30, 2013
PubMed
Summary
This summary is machine-generated.

Familial dystonia arises from neuron dysfunction, impacting motor pathways. Research into DYT genes reveals cellular pathways like nuclear regulation and synaptic function are key to understanding this movement disorder.

Keywords:
DYT genescell cycleendoplasmic reticulumnuclear envelopesynaptic function

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Last Updated: May 9, 2026

Implantation of Osmotic Pumps and Induction of Stress to Establish a Symptomatic, Pharmacological Mouse Model for DYT/PARK-ATP1A3 Dystonia
10:41

Implantation of Osmotic Pumps and Induction of Stress to Establish a Symptomatic, Pharmacological Mouse Model for DYT/PARK-ATP1A3 Dystonia

Published on: September 12, 2020

Rapid Genotyping of Animals Followed by Establishing Primary Cultures of Brain Neurons
09:51

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Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia
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Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia

Published on: January 27, 2018

Area of Science:

  • Neuroscience
  • Genetics
  • Cell Biology

Background:

  • Dystonias are hyperkinetic movement disorders caused by neuron dysfunction in motor system nodes.
  • Understanding familial dystonia genetics offers insights into cellular dysfunction and motor pathway disruption.

Purpose of the Study:

  • To review literature on the genetics and cellular pathology of dystonia.
  • To identify and categorize emerging pathogenetic mechanisms involved in dystonia.

Main Methods:

  • Literature review of English-language publications on PubMed.
  • Focus on genetics and cellular pathology of dystonia.
  • Identification of thematic groups of pathogenetic mechanisms.

Main Results:

  • Numerous potential pathogenetic mechanisms for dystonia identified.
  • Mechanisms fall into three emerging thematic groups: nuclear regulation, endoplasmic reticulum/nuclear envelope function, and synaptic function control.
  • DYT genes implicate various cell functions in dystonia pathogenesis.

Conclusions:

  • Cellular dysfunction in specific pathways contributes to dystonia.
  • Further research into these pathways can elucidate dystonia pathogenesis.
  • Genetics of familial dystonia provides critical cellular insights.