Alternating nystagmus is a spontaneous nystagmus which changes in direction without any external influence. In the literature this phenomenon has so far been described in 90 cases; in 12 of these, the nystagmus had a congenital origin. In contradistinction to the congenital type, the acquired type of alternating nystagmus is in most cases caused by a central nervous system disorder. We found the phenomenon of alternating nystagmus in 21 cases, in 15 of which it was congenital. The nystagmus was observed by means of electronystagmography. Differences were found between the two nystagmus types. The characteristics of alternating nystagmus are discussed.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.3109/00016487909126441 | DOI Listing |
J Neurol
February 2025
Neuroradiology Unit, Diagnostic and Functional Neuroradiology and Brain Stimulation Department, 15-20 National Vision Hospital - Paris University Hospital Center, 75012, Paris, France.
MRI has traditionally been employed to rule out alternative diagnoses in unilateral acute vestibular syndrome (UAVS), but delayed 3D-FLAIR sequences offer the potential for imaging to contribute to both diagnosis and management. This study aimed to assess abnormalities on delayed 3D-FLAIR MRI in UAVS patients and correlate these findings with clinical outcomes. A retrospective multicenter study was conducted between January 2018 and May 2024 at a university hospital and a private vestibular clinic, representing a diverse clinical setting.
View Article and Find Full Text PDFInd Psychiatry J
December 2024
Department of Physiology, Maharaja Agrasen Medical College, Agroha, Haryana, India.
Psychotropic medications, particularly antipsychotics, are known to elicit various adverse effects, with ocular complications being underreported yet significant. This case series presents three instances where atypical antipsychotics, namely Risperidone, Cariprazine, and Olanzapine, led to ocular dystonias and nystagmus. These adverse effects occurred at relatively low doses, highlighting the need for vigilant monitoring even with second-generation antipsychotics.
View Article and Find Full Text PDFBMJ Case Rep
January 2025
Neurology, Joondalup Health Campus, Joondalup, Western Australia, Australia.
Anti-dipeptidyl-peptidase-like protein 6 antibody-mediated disease is a rare autoimmune encephalitis typically presenting with diarrhoea and/or weight loss, central nervous system hyperexcitability and cognitive dysfunction. We present a case of a young woman with 10 days of diplopia and unsteadiness in the context of dysthymia and significant weight loss over 2 months. Initial examination demonstrated mixed dysconjugate nystagmus and ataxic gait.
View Article and Find Full Text PDFCureus
December 2024
Internal Medicine, Unidade Local de Saúde da Região de Aveiro, Aveiro, PRT.
Schwannomas (SCs) are benign tumors composed of neoplastic Schwann cells and are relatively uncommon intracranially. Although these tumors are frequently associated with neurofibromatosis type 2 (NF2), they may also arise idiopathically, and their pathogenesis remains poorly understood. A 70-year-old Caucasian man presented with a two-month history of vertigo, gait imbalance, and decreased visual acuity in the left eye accompanied by photophobia, nausea, vomiting, and occasional headaches.
View Article and Find Full Text PDFInt J Emerg Med
December 2024
Mejiro University Ear Institute Clinic, 320 Ukiya, Iwatsuki-ku, Saitama-shi, Saitama, 339-8501, Japan.
Background: Reduction of spontaneous nystagmus by fixation, a characteristic feature of peripheral nystagmus, is important for differentiating between peripheral and central vestibular disorders. In the emergency room, Frenzel goggles are recommended to observe spontaneous nystagmus for the differential diagnosis of acute vestibular syndrome. We developed a portable loupe with a Fresnel lens to observe nystagmus.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!