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Related Concept Videos

Parkinson's Disease: Overview01:15

Parkinson's Disease: Overview

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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...
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Seizures: Classification01:13

Seizures: Classification

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Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
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Restless Leg Syndrome and Night Terrors01:27

Restless Leg Syndrome and Night Terrors

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Restless Leg Syndrome (RLS), also known as Willis-Ekbom disease, is a neurological disorder characterized by an uncontrollable urge to move the legs due to uncomfortable sensations. These sensations typically occur during periods of rest or inactivity, particularly when lying down or sitting, and can severely disrupt sleep.
The exact cause of RLS is not fully understood, but it is believed to involve dopamine, a neurotransmitter that helps regulate muscle movement. Imbalances in dopamine levels...
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Generalized Anxiety Disorder01:30

Generalized Anxiety Disorder

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Generalized Anxiety Disorder (GAD) is a chronic condition characterized by excessive and uncontrollable worry that persists for at least six months, significantly interfering with daily functioning. Unlike situational anxiety, which arises in response to specific stressors, GAD often occurs without a clear cause. Individuals may experience disproportionate worry about work, health, or relationships. For instance, a person might continuously fear poor health despite normal medical evaluations or...
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Parkinson's Disease: Treatment01:24

Parkinson's Disease: Treatment

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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...
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Physical Pendulum01:06

Physical Pendulum

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When a rigid body is hanging freely from a fixed pivot point and is displaced, it oscillates similar to a simple pendulum and is known as a physical pendulum. The period and angular frequency of a physical pendulum are obtained by using the small-angle approximation and drawing parallels with a spring-mass system. The small-angle approximation (sinθ=θ) is valid up to about 14°.
When dealing with complicated systems, the mass moment of inertia is an important parameter, as it...
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Related Experiment Video

Updated: Sep 13, 2025

MRI-guided Focused Ultrasound Thalamotomy for Patients with Medically-refractory Essential Tremor
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Essential Tremor.

Ludy C Shih

    Continuum (Minneapolis, Minn.)
    |August 1, 2025
    PubMed
    Summary
    This summary is machine-generated.

    Essential tremor diagnosis and management are reviewed. Current treatments include medications like propranolol, deep brain stimulation (DBS), and focused ultrasound, with new therapies under investigation.

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    Area of Science:

    • Neurology
    • Movement Disorders

    Background:

    • Tremor is a common symptom with diverse causes.
    • Essential tremor, characterized by bilateral upper limb action tremor, is frequently misdiagnosed.
    • Distinguishing tremor from other movement disorders is crucial.

    Purpose of the Study:

    • To review the clinical evaluation approach for tremor.
    • To discuss the diagnosis of essential tremor and its differential diagnoses.
    • To outline current and emerging management options for tremor.

    Main Methods:

    • Review of clinical evaluation strategies for tremor.
    • Analysis of diagnostic criteria for essential tremor.
    • Survey of established and investigational treatment modalities.

    Main Results:

    • Accurate diagnosis requires careful history, clinical examination, and consideration of alternative etiologies (e.g., drug-induced, metabolic).
    • Established treatments include oral pharmacotherapies (propranolol, primidone), deep brain stimulation (DBS), and focused ultrasound thalamotomy for refractory cases.
    • Emerging therapies include novel oral agents, noninvasive nerve stimulation, and botulinum toxin injections.

    Conclusions:

    • Effective management of tremor relies on accurate diagnosis and tailored treatment strategies.
    • While traditional therapies remain vital, ongoing research promises expanded therapeutic options for essential tremor.
    • Further studies are needed for novel treatments like noninvasive stimulation and botulinum toxin.