Results 31 to 40 of about 11,380 (262)
The pupillary light response reveals the focus of covert visual attention. [PDF]
PLoS ONE, 2013 The pupillary light response is often assumed to be a reflex that is not susceptible to cognitive influences. In line with recent converging evidence, we show that this reflexive view is incomplete, and that the pupillary light response is modulated by ...
Sebastiaan Mathôt +3 more
doaj +1 more source
PLoS ONE, 2019 We evaluated whether the pupillary light reflex is altered in benign essential blepharospasm patients. Twenty-three patients with benign essential blepharospasm, 47 with reflex blepharospasm, and 29 dry eye disease controls were included. Pupillary light
Yong-Soo Byun +3 more
doaj +1 more source
Cortical modulation of pupillary function: systematic review [PDF]
PeerJ, 2019 Background The pupillary light reflex is the main mechanism that regulates the pupillary diameter; it is controlled by the autonomic system and mediated by subcortical pathways.
Costanza Peinkhofer +3 more
doaj +2 more sources
The Pupillary Light Reflex in Borderline Diabetics
Journal of International Medical Research, 1989 Computerized IR videopupillography, using an open-loop photic stimulator, was used to compare the reflexes of borderline diabetics with overt non-insulin-dependent diabetics and with age- and sex-matched non-diabetic healthy controls. The patients were all male, aged 41–59 years.
N, Kuroda +3 more
openaire +2 more sources
Estimation of operators’ fatigue using optical methods for determination of pupil activity
International Journal of Occupational Medicine and Environmental Health, 2015 Introduction The purpose of this study was to develop and initially validate an objective, yet quick, method for assessment of human fatigue. This aim can be achieved by the use of an optical, non-contact method of analysis of pupil activity.
Krzysztof Różanowski +2 more
doaj +1 more source
Pupillary responses to single and sinusoidal light stimuli in diabetic patients
Neurology International, 2009 We examined effects of diabetes mellitus (DM) on the pupillary light reflex (PLR). Phasic pupillary response to a single light stimulus (200 ms) (pPLR) and to continuous sinusoidal stimuli with four different frequencies (0.1, 0.3, 0.7, 1.3Hz) (cPLR ...
Wolfgang H. Zangemeister +2 more
doaj +1 more source
Hypersensitive pupillary light reflex in infants at risk for autism [PDF]
, 2015 Background: Post mortem brain tissue data and animal modeling work indicate cholinergic disruptions in autism. Moreover, the cholinergic system plays a key role in the early neurodevelopmental processes believed to be derailed early in life in ...
Nyström, P. +18 more
core +1 more source
Investigation of light-induced lacrimation and pupillary responses in episodic migraine.
PLoS ONE, 2020 The purpose of this pilot study was to investigate the light-induced pupillary and lacrimation responses mediated by intrinsically photosensitive retinal ganglion cells (ipRGCs) in migraine.
Marija Zivcevska +5 more
doaj +1 more source
Comparing two captive bolt devices on market age Pekin ducks
Journal of Applied Poultry Research, 2021 Summary: The objective of this study was to determine the efficacy of 2 captive bolt devices in the euthanasia of market age Pekin ducks. One hundred twenty ducks were euthanized using either a commercially available captive bolt device (Zephyr-EXL, n ...
A.M. Stiewert, G.S. Archer
doaj +1 more source
Pupillary Size and Light Reflex in Premature Infants [PDF]
Neuro-Ophthalmology, 2015 The authors examined pupillary light reflexes to both red and blue stimuli using infrared video-pupillography in premature infants. Pupillary light reflexes were obtained in response to 470 nm blue and 635 nm red stimuli with varying intensities of 10 cd/m2 and 100 cd/m2. Red stimuli did not evoke a pupillary response in premature infants.
Tetsuya, Ikeda +4 more
openaire +2 more sources