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August 15, 2026Arquivos de Neuro-PsiquiatriaOpen Access

Downbeat nystagmus: a practical approach based on a clinical case

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Authors

RMRebecca Ranzani MartinsCPCristiana Borges Pereira

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Overview

Case-based review details the pathophysiology, etiologies, and multimodality management of downbeat nystagmus, highlighting targeted pharmacotherapy and vestibular rehabilitation strategies.

Key Points

  • Provide a practical, case-based framework detailing the pathophysiology, differential diagnosis, and therapeutic options for downbeat nystagmus.
  • Reviewed the neuroanatomical pathways implicated in downbeat nystagmus, focusing on cerebellar and vestibular structures.
  • Synthesized clinical presentation patterns, diverse underlying etiologies, and evidence for optical, rehabilitative, and pharmacological treatments.
  • Characterized the condition by slow upward ocular drift with corrective downward quick phases driven by decreased inhibition of the superior vestibular nucleus.
  • Identified that roughly 40% of cases are idiopathic, while others stem from Chiari malformations, vascular insults, toxic-metabolic causes, or cerebellar ataxias.
  • Determined that management centers on etiology-targeted interventions, optical prisms, vestibular therapy, and second-line pharmacotherapy such as 4-aminopyridine, clonazepam, or gabapentin.

Cite This Study

Martins et al. (2026) studied this question.

synapsesocial.com/papers/6a8019fe75c2e31742c8654bhttps://doi.org/10.1055/s-0046-1827165
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