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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...
Direct Motor Pathways01:11

Direct Motor Pathways

The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and the...
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 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...
Indirect Motor Pathways01:22

Indirect Motor Pathways

The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...

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Related Experiment Video

Updated: Jun 6, 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

Molecular pathways in dystonia.

D Cristopher Bragg1, Ioanna A Armata, Flavia C Nery

  • 1Department of Neurology, Massachusetts General Hospital, Charlestown, MA, USA. bragg@helix.mgh.harvard.edu

Neurobiology of Disease
|December 8, 2010
PubMed
Summary
This summary is machine-generated.

Hereditary dystonias like DYT1, DYT6, and DYT16 share motor deficits. Recent research reveals potential links between DYT6 and DYT16 proteins in signaling and stress pathways.

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Related Experiment Videos

Last Updated: Jun 6, 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

Rapid Genotyping of Animals Followed by Establishing Primary Cultures of Brain Neurons

Published on: January 29, 2015

Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia
10:05

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

Published on: January 27, 2018

Area of Science:

  • Neuroscience
  • Genetics
  • Molecular Biology

Background:

  • Hereditary dystonias are a group of neurological disorders characterized by motor deficits.
  • While DYT1 has a known genetic basis, the molecular etiologies for DYT6 and DYT16 are recently identified.

Purpose of the Study:

  • To review recent advances in understanding three forms of hereditary dystonia: DYT1, DYT6, and DYT16.
  • To explore potential common molecular pathways underlying these distinct dystonia types.

Main Methods:

  • Literature review of recent research on DYT1, DYT6, and DYT16.
  • Analysis of genetic and functional data for the proteins encoded by DYT6 and DYT16 genes.

Main Results:

  • DYT1, DYT6, and DYT16 present with similar clinical features, including childhood onset and progressive, generalized motor deficits.
  • Emerging evidence suggests DYT6 and DYT16 proteins may interact within pathways involving dopaminergic signaling, transcriptional regulation, and cellular stress responses.

Conclusions:

  • Despite different molecular origins, DYT6 and DYT16 may share functional pathways relevant to disease mechanisms.
  • Further research into these interconnected pathways could reveal novel therapeutic targets for hereditary dystonias.