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Hilbert transform analysis of the mouse scotopic electroretinogram reveals two distinct bursts of oscillatory potentials with progressively dimmer flashes.
Doc Ophthalmol
January 2025
Department of Ophthalmology and Visual Sciences, Research Institute of the McGill University Health Centre/Montreal Children's Hospital, 1001 Décarie Boulevard, Glen Site, Block E, Office #EM03238, Montréal, QC, H4A 3J1, Canada.
Purpose: Study the scotopic oscillatory potentials (OPs) in mice over a wide range of flash luminance levels using the Hilbert transform (HT) to extract new features of the high frequency components of the electroretinogram (ERG).
Methods: Scotopic ERGs [Intensity: - 6.3 to 0.
A first morphological and electrophysiological characterization of Fañanas cells of the mouse cerebellum.
J Physiol
January 2025
Université Paris Cité, CNRS, Saints-Pères Paris Institute for the Neurosciences, Paris, France.
Fañanas cells (FCs) are cerebellar glia of unknown function. First described more than a century ago, they have been almost absent from the scientific literature ever since. Here, we combined whole-cell, patch clamp recordings, near-UV laser photolysis, dye-loading and confocal imaging for a first characterization of FCs in terms of their morphology, electrophysiology and glutamate-evoked currents.
View Article and Find Full Text PDFDifferential effects of isoflurane on auditory and visually evoked potentials in the cat.
Front Syst Neurosci
December 2024
Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada.
Evoked potentials can be used as an intraoperative monitoring measure in neurological surgery. Auditory evoked potentials (AEPs), or specifically brainstem auditory evoked responses (BAERs), are known for being minimally affected by anesthetics, while visually evoked potentials (VEPs) are presumed to be unreliable and easily affected by anesthetics. While many anesthesia trials or intraoperative recordings have provided evidence in support of these hypotheses, the comparisons were always made between AEPs and VEPs recorded sequentially, rather than recorded at the same time.
View Article and Find Full Text PDFModeling monocular form deprivation in rabbits using a simulated-cataract intraocular lens.
Int J Ophthalmol
December 2024
Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou 325003, Zhejiang Province, China.
Aim: To establish an animal model of form deprivation amblyopia based on a simulated cataract intraocular lens (IOLs).
Methods: Poly(dimethyl siloxane)-SiO thin films (PSF) with different degrees of opacity as IOL materials were prepared. The light transmission of the PSF-IOL was measured, and its biosafety was determined by cell counting kit (CCK)-8 assay using the HLEC-B3 cell line and ARPE-19 cell line.
Refining Flash Visual Evoked Potential Analysis in Rats: A Novel Approach Using Bilateral Epidural Electrodes.
Transl Vis Sci Technol
December 2024
Department of Ophthalmology and Visual Sciences, University of Maryland School of Medicine, Baltimore, MD, USA.
Purpose: Visual evoked potentials (VEPs) are electrical signals generated at the visual cortex following visual stimulation. Flash VEPs (fVEPs) are produced by global retinal stimulation and are considered an objective measure of the integrity of the entire visual pathway. However, fVEP measurements are highly sensitive to external variables, making relative comparisons of the fVEP waveforms between the two eyes in the same individual challenging.
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