Results 91 to 100 of about 7,378 (211)

Seasonal Variations in Adults with and without Cataracts [PDF]

open access: yes, 2017
Seasonal adaptation is a ubiquitous behavior seen in many species on both global hemispheres and is conveyed by changing photoperiods. In humans this seasonal adaptation is less apparent, in part because changes in daylength are masked by the use of ...
Hashemi, Kattayoon   +4 more
core   +1 more source

Abnormal Sleep in Chronic Inflammatory Demyelinating Polyneuropathy

open access: yesEuropean Journal of Neurology, Volume 32, Issue 11, November 2025.
Beyond subjectively reduced sleep quality, actigraphic data show that persons with chronic inflammatory demyelinating polyneuropathy (CIDP) have a lowered sleep efficacy and experience increased nocturnal arousals. This suggests that sleep disturbance is a genuine aspect of CIDP adding to the underrecognized problem of non‐sensorimotor symptoms in this
Oliver L. Steiner   +2 more
wiley   +1 more source

Rod photoreceptors drive circadian photoentrainment across a wide range of light intensities. [PDF]

open access: yes, 2010
In mammals, synchronization of the circadian pacemaker in the hypothalamus is achieved through direct input from the eyes conveyed by intrinsically photosensitive retinal ganglion cells (ipRGCs).
Alam, Nazia M   +6 more
core  

Short-wavelength enrichment of polychromatic light enhances human melatonin suppression potency. [PDF]

open access: yes, 2015
The basic goal of this research is to determine the best combination of light wavelengths for use as a lighting countermeasure for circadian and sleep disruption during space exploration, as well as for individuals living on Earth.
Ayers, Melissa   +8 more
core   +2 more sources

The effects of a HEV‐filtering contact lens on the brightness of natural images

open access: yesOphthalmic and Physiological Optics, Volume 45, Issue 7, Page 1801-1810, November 2025.
Abstract Purpose Yellow filters, including high‐energy‐visible (HEV) filtering lenses, have been thought to increase the subjective brightness of real‐world scenes, but laboratory results are mixed. This study used a brightness matching technique modified to present natural images using a broad spectrum of wavelengths: a visibly clear control contact ...
Billy R. Hammond   +6 more
wiley   +1 more source

The Effects of Food on Circadian Rhythm: A Comprehensive Review

open access: yeseFood, Volume 6, Issue 5, October 2025.
(a) Light signals are received by the retina and transmitted to the suprachiasmatic nucleus (SCN), the master circadian clock, which synchronizes peripheral clocks in metabolic tissues via neural and humoral pathways (e.g., cortisol). (b) The molecular clock is governed by a transcriptional‐translational feedback loop.
Jiazheng Hu   +7 more
wiley   +1 more source

Morphology and mosaics of melanopsin‐expressing retinal ganglion cell types in mice [PDF]

open access: yesJournal of Comparative Neurology, 2010
AbstractMelanopsin is the photopigment of intrinsically photosensitive retinal ganglion cells (ipRGCs). Melanopsin immunoreactivity reveals two dendritic plexuses within the inner plexiform layer (IPL) and morphologically heterogeneous retinal ganglion cells.
David M, Berson   +2 more
openaire   +3 more sources

Rhodopsin and Melanopsin Contributions to the Early Redilation Phase of the Post-Illumination Pupil Response (PIPR). [PDF]

open access: yesPLoS ONE, 2016
Melanopsin expressing intrinsically photosensitive Retinal Ganglion Cells (ipRGCs) entirely control the post-illumination pupil response (PIPR) from 6 s post-stimulus to the plateau during redilation after light offset.
Prakash Adhikari   +2 more
doaj   +1 more source

Stepwise Differentiation of Retinal Ganglion Cells from Human Pluripotent Stem Cells Enables Analysis of Glaucomatous Neurodegeneration [PDF]

open access: yes, 2016
Human pluripotent stem cells (hPSCs), including both embryonic and induced pluripotent stem cells, possess the unique ability to readily differentiate into any cell type of the body, including cells of the retina.
Cummins, Theodore R.   +6 more
core   +1 more source

Dreamy Dwellings: How the Sleep Environment Affects Sleep Health in Adults—A Narrative Review

open access: yesLifestyle Medicine, Volume 6, Issue 4, October 2025.
ABSTRACT Sufficient high‐quality, well‐timed sleep is essential to health and physical, cognitive and emotional functions. Historically, environmental factors such as threats from other beings have likely constrained sleep. Newer sources of sleep disruption include modern work schedules, climate change, light pollution and noise pollution.
Gregory David Maxwell Potter   +5 more
wiley   +1 more source

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