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Related Concept Videos

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...
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 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...

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Related Experiment Video

Updated: Jun 10, 2026

MRI-guided Focused Ultrasound Thalamotomy for Patients with Medically-refractory Essential Tremor
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Advances in primary writing tremor.

Chen Hai1, Wang Yu-ping, Wei Hua

  • 1Department of Neurology, Xuanwu Hospital, Capital Medical University, No 45 Changchun Street, Xuanwu, Beijing 100053, China. chenhai194@sina.com

Parkinsonism & Related Disorders
|July 16, 2010
PubMed
Summary

Primary writing tremor (PWT) is a handwriting-specific condition with unclear causes. Potential treatments include botulinum toxin and deep brain stimulation.

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Last Updated: Jun 10, 2026

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05:54

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Handwriting Analysis Indicates Spontaneous Dyskinesias in Neuroleptic Na&#239;ve Adolescents at High Risk for Psychosis
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Area of Science:

  • Neurology
  • Movement Disorders

Background:

  • Primary writing tremor (PWT) is a task-specific tremor affecting handwriting.
  • The exact pathophysiology and classification of PWT remain unclear.
  • It may represent a variant of essential tremor, focal dystonia, or a distinct neurological entity.

Purpose of the Study:

  • To elucidate the pathophysiology of primary writing tremor.
  • To explore potential therapeutic interventions for PWT.

Main Methods:

  • This abstract does not detail specific methods.
  • Information is based on current understanding and proposed treatments.

Main Results:

  • The pathophysiology of PWT is not clearly defined.
  • Treatment options under consideration include botulinum toxin injections and deep brain stimulation.

Conclusions:

  • Primary writing tremor is a distinct condition impacting handwriting.
  • Further research is needed to clarify its pathophysiology.
  • Botulinum toxin and deep brain stimulation are potential treatment avenues.