Results 21 to 30 of about 3,447,725 (137)

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, Lotje van der Linden, Jonathan Grainger, Françoise Vitu   +3 more
doaj   +1 more source

Increased pupillary constriction velocity in benign essential blepharospasm associated with photophobia.

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, Sung-Eun Kim, Ji-Sun Paik, Suk-Woo Yang   +3 more
doaj   +1 more source

Pivotal roles of melanopsin containing retinal ganglion cells in pupillary light reflex in photopic conditions [PDF]

Front Cell Neurosci
Tomomi Ichinose
europepmc   +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, Gitte M. Knudsen, Rita Moretti, Daniel Kondziella   +3 more
doaj   +2 more sources

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 ...
G. Gredebäck (23458372), T. Falck-Ytter (11842612), P. Nyström (23458369), Sven Bölte (431462)   +3 more
core   +2 more sources

Optical Sensor to Monitor Pupillary Light Reflex [PDF]

, 2013
The aim of the paper is to describe design of an optical sensor intended to analyze pupillary light reflex. It also presents the results of physiological adaptation mechanisms in human eye, i.e.
Różanowski, K., Murawski, K.
core   +1 more source

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, Michał Bernat, Agnieszka Kamińska   +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, Thilo Gronow, Ulrich Grzyska   +2 more
doaj   +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, Shaobo Lei, Alan Blakeman, Daune MacGregor, Herbert C Goltz, Agnes M F Wong   +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