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Related Concept Videos

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The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
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Glaucoma: Overview01:25

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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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Angle Closure Glaucoma: Treatment01:28

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Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
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Prosopagnosia01:24

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Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
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Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
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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.
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Related Experiment Video

Updated: Jun 28, 2025

Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform
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[COVID-19 presenting with nystagmus].

E García-Romo1, R Blanco2, C Nicholls1

  • 1Departamento de Oftalmología, Hospital Universitario de Guadalajara, Guadalajara, España.

Archivos De La Sociedad Espanola De Oftalmologia
|April 15, 2024
PubMed
Summary

A young adult developed neurological symptoms, including nystagmus, after COVID-19 infection. This case highlights potential long-term neurological complications of SARS-CoV-2, emphasizing the need for further investigation into post-viral syndromes.

Keywords:
NystagmusSARS-CoV-2

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Area of Science:

  • Neurology
  • Infectious Diseases
  • Ophthalmology

Background:

  • The COVID-19 pandemic, caused by SARS-CoV-2, has been associated with a wide range of neurological manifestations.
  • While respiratory symptoms are common, atypical presentations and long-term sequelae are increasingly recognized.

Observation:

  • A 20-year-old female presented with upper respiratory symptoms followed by dizziness and acquired nystagmus.
  • Initial otorhinolaryngology and neurological examinations, including MRI, were unremarkable.
  • SARS-CoV-2 immunoglobulin G (IgG) antibodies were positive, confirming prior infection.

Findings:

  • The patient's neurological symptoms, specifically intermittent horizontal nystagmus, emerged weeks after the initial SARS-CoV-2 infection.
  • The temporal association between COVID-19 infection and the onset of nystagmus suggests a potential causal link.
  • Normal neurological and imaging findings underscore the challenge in diagnosing post-infectious neurological complications.

Implications:

  • This case suggests that SARS-CoV-2 infection may be a probable cause of acquired nystagmus.
  • It highlights the importance of considering COVID-19 in the differential diagnosis of new-onset neurological symptoms, even in young individuals.
  • Further research is warranted to understand the pathophysiology and long-term neurological impact of SARS-CoV-2 infection.