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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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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.
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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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Glaucoma: Overview

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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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Related Experiment Video

Updated: Aug 20, 2025

Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
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Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking

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[Visual disturbances in Parkinson's disease].

A Yu Nikitina1, N V Melnikova1, L K Moshetova1

  • 1Russian Medical Academy for Continuous Professional Education, Moscow, Russia.

Zhurnal Nevrologii I Psikhiatrii Imeni S.S. Korsakova
|November 22, 2022
PubMed
Summary

Parkinson's disease (PD) often includes non-motor symptoms like visual disturbances. This article explores their causes and treatments in PD patients.

Keywords:
Parkinson’s diseasedry eye diseaseneurodegenerative diseaseretinavisual disturbances

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Area of Science:

  • Neurology
  • Ophthalmology

Context:

  • Parkinson's disease (PD) is characterized by motor deficits.
  • Non-motor manifestations, including visual disturbances, are increasingly recognized in PD.

Purpose:

  • To discuss the visual disturbances experienced by Parkinson's disease patients.
  • To explore the pathogenetic mechanisms underlying these visual symptoms.
  • To outline current and potential treatment methods for visual disturbances in PD.

Summary:

  • Parkinson's disease (PD) presents with motor impairments like bradykinesia and tremor.
  • Beyond motor symptoms, PD involves various non-motor manifestations, notably visual disturbances.
  • This review details the visual disturbances in PD, their origins, and therapeutic strategies.

Impact:

  • Enhances understanding of the full spectrum of Parkinson's disease symptoms.
  • Provides insights into the neurological and ocular pathways affected by PD.
  • Informs clinical practice regarding the diagnosis and management of visual issues in PD patients.