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Fixation-related potentials during a virtual navigation task: The influence of image statistics on early cortical processing.
Atten Percept Psychophys
January 2025
U.S. DEVCOM Army Research Laboratory, Humans in Complex Systems, Aberdeen Proving Ground, MD, USA.
Historically, electrophysiological correlates of scene processing have been studied with experiments using static stimuli presented for discrete timescales where participants maintain a fixed eye position. Gaps remain in generalizing these findings to real-world conditions where eye movements are made to select new visual information and where the environment remains stable but changes with our position and orientation in space, driving dynamic visual stimulation. Co-recording of eye movements and electroencephalography (EEG) is an approach to leverage fixations as time-locking events in the EEG recording under free-viewing conditions to create fixation-related potentials (FRPs), providing a neural snapshot in which to study visual processing under naturalistic conditions.
View Article and Find Full Text PDFQuantification of the Anterior-Centripetal Movement of the Ciliary Muscle During Accommodation Using Dynamic OCT Imaging.
Transl Vis Sci Technol
January 2025
Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA.
Purpose: Although the lens undoubtedly plays a major role in presbyopia, altered lens function could be in part secondary to age-related changes of the ciliary muscle. Ciliary muscle changes with accommodation have been quantified using optical coherence tomography, but so far these studies have been limited to quantifying changes in ciliary muscle thickness, mostly at static accommodative states. Quantifying ciliary muscle thickness changes does not effectively capture the dynamic anterior-centripetal movement of the ciliary muscle during accommodation.
View Article and Find Full Text PDFLong-Term Impact of Recurrent Acute Otitis Media on Balance and Vestibular Function in Children.
Brain Sci
December 2024
Department of Pathophysiology and Transplantation, University of Milan, 20122 Milan, Italy.
Background/objectives: Recurrent acute otitis media (rAOM) is a common disease in childhood, but its impact on the vestibular system remains poorly understood. The present study aimed to evaluate the long-term effects of rAOM on balance and vestibular function in pediatric patients.
Methods: A total of 55 children, aged 8 years (25 males and 30 females), with a documented history of rAOM, no AOM episodes in the past year, and no previous ear surgery were assessed.
Modulation of the peak velocities and gains of abduction and adduction saccades according to head position.
Jpn J Ophthalmol
January 2025
Department of Neurology, Yokohama Brain and Spine Center, Yokohama, Japan.
Purpose: To assess the effects of modifying head position and of static ocular counter-rolling (OCR) on abduction and adduction in saccadic eye movements using a head-mounted video-oculographic device.
Study Design: A clinical observational study.
Methods: The peak velocities and amplitude gains of visually guided 12° saccades were binocularly measured in 21 healthy volunteers with their heads in the upright vertical (0°) and horizontal (± 90°, bilateral side-lying) postures, and in 6 participants with their head positions bilaterally tilted by 30°.
The Surgical Management of the Eye in Facial Palsy.
Facial Plast Surg
December 2024
Department of ENT and Facial Plastic Surgery, The Royal National ENT & Eastman Dental Hospital, University College London NHS Foundation Trust, London, United Kingdom.
The surgical management of the periocular region in facial palsy is a critical aspect of addressing the ocular morbidity associated with facial paralysis. The reconstruction around the eye in facial palsy should take into account the duration of the facial palsy and underlying ocular pathologies. Exposure keratopathy can develop secondary to lagophthalmos, ectropion, and brow ptosis.
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