scholarly journals The pupillary light response reflects exogenous attention and inhibition of return

2014 ◽  
Vol 14 (14) ◽  
pp. 7-7 ◽  
Author(s):  
S. Mathot ◽  
E. Dalmaijer ◽  
J. Grainger ◽  
S. Van der Stigchel
Keyword(s):  
Inhibition Of Return ◽  
Light Response ◽  
Exogenous Attention ◽  
Pupillary Light

scholarly journals The pupillary light response reflects exogenous attention and inhibition of return

2014 ◽  
Author(s):  
Sebastiaan Mathôt ◽  
Edwin S. Dalmaijer ◽  
Jonathan Grainger ◽  
Stefan Van der Stigchel
Keyword(s):  
Eye Movement ◽  
Behavioral Inhibition ◽  
Inhibition Of Return ◽  
Light Response ◽  
Dark Side ◽  
Exogenous Attention ◽  
Pupillary Light ◽  
Bright Side ◽  
Exogenous Cue ◽  
Behavioral Phenomenon

Here we show that the pupillary light response reflects exogenous (involuntary) shifts of attention and inhibition of return. Participants fixated in the center of a display that was divided into a bright and a dark half. An exogenous cue attracted attention to the bright or dark side of the display. Initially, the pupil constricted when the bright, as compared to the dark side of the display was cued, reflecting a shift of attention towards the exogenous cue. Crucially, this pattern reversed about one second after cue presentation. This later-occurring, relative dilation (when the bright side was cued) reflected disengagement from the previously attended location, analogous to the behavioral phenomenon of inhibition of return. Indeed, we observed a strong correlation between 'pupillary inhibition' and behavioral inhibition of return. We conclude that the pupillary light response is a complex eye movement that reflects how we selectively parse and interpret visual input.

scholarly journals The pupillary light response reflects exogenous attention and inhibition of return

2014 ◽  
Author(s):  
Sebastiaan Mathôt ◽  
Edwin S. Dalmaijer ◽  
Jonathan Grainger ◽  
Stefan Van der Stigchel
Keyword(s):  
Eye Movement ◽  
Behavioral Inhibition ◽  
Inhibition Of Return ◽  
Light Response ◽  
Dark Side ◽  
Exogenous Attention ◽  
Pupillary Light ◽  
Bright Side ◽  
Exogenous Cue ◽  
Behavioral Phenomenon

Here we show that the pupillary light response reflects exogenous (involuntary) shifts of attention and inhibition of return. Participants fixated in the center of a display that was divided into a bright and a dark half. An exogenous cue attracted attention to the bright or dark side of the display. Initially, the pupil constricted when the bright, as compared to the dark side of the display was cued, reflecting a shift of attention towards the exogenous cue. Crucially, this pattern reversed about one second after cue presentation. This later-occurring, relative dilation (when the bright side was cued) reflected disengagement from the previously attended location, analogous to the behavioral phenomenon of inhibition of return. Indeed, we observed a strong correlation between 'pupillary inhibition' and behavioral inhibition of return. We conclude that the pupillary light response is a complex eye movement that reflects how we selectively parse and interpret visual input.

The pupillary light response reflects encoding, but not maintenance, in visual working memory.

2016 ◽  
Vol 42 (11) ◽  
pp. 1716-1723 ◽  
Author(s):  
Tessel Blom ◽  
Sebastiaan Mathôt ◽  
Christian N. L. Olivers ◽  
Stefan Van der Stigchel
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Light Response ◽  
Pupillary Light

scholarly journals Quantitative Pupillometry in the Intensive Care Unit

2019 ◽  
pp. 088506661988112
Author(s):  
Matthew M. Bower ◽  
Alexander J. Sweidan ◽  
Jordan C. Xu ◽  
Sara Stern-Nezer ◽  
Wengui Yu ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Objective Assessment ◽  
Light Response ◽  
Pressure Monitoring ◽  
Neurological Intensive Care Unit ◽  
Neurological Intensive Care ◽  
Pupillary Light ◽  
Pupillary Reactivity ◽  
Neurological Pupil Index

Quantitative pupillometry provides a noninvasive and objective assessment within the neurological examination. This review details the physiology of the pupillary light response, the clinical significance of changes in pupillary reactivity, and the variables that compose the Neurological Pupil index or NPi are discussed. This article reviews the most recent applications and advances in quantitative pupillometry for noninvasive intracranial pressure monitoring, postcardiac arrest prognostication, and subarachnoid hemorrhage. Also discussed are the limitations and confounders of quantitative pupillometry in the modern neurological intensive care unit.

scholarly journals The Melanopsin-Mediated Pupillary Light Response Is Not Changed in Patients with Newly Diagnosed Idiopathic Intracranial Hypertension

2017 ◽  
Vol 42 (2) ◽  
pp. 65-72 ◽  
Author(s):  
Shakoor Ba-Ali ◽  
Rigmor Højland Jensen ◽  
Line Sofie Larsen ◽  
Henrik Lund-Andersen ◽  
Steffen Hamann
Keyword(s):  
Intracranial Hypertension ◽  
Idiopathic Intracranial Hypertension ◽  
Light Response ◽  
Newly Diagnosed ◽  
Pupillary Light

scholarly journals Evaluation of Disk Halo Size after Implantation of a Collamer Lens with a Central Hole (ICL V4c)

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Xun Chen ◽  
Tian Han ◽  
Feng Zhao ◽  
Huamao Miao ◽  
Xiaoying Wang ◽  
...  
Keyword(s):  
Light Response ◽  
Pupillary Response ◽  
Central Hole ◽  
Implantable Collamer Lens ◽  
Contraction Amplitude ◽  
Pupillary Light ◽  
Significant Difference ◽  
Icl V4c ◽  
Latency Duration ◽  
Average Pupil

Purpose. To investigate disk halo size changes produced by a glare source after surgical insertion of an implantable collamer lens with a central hole (ICL V4c) for myopia correction. Methods. In this prospective study, disk halo size and pupillary light response with a vision monitor were measured preoperatively and at 1 week, 1 month, and 3 months postoperatively. Pupillary light response parameters included contraction amplitude, latency, duration, and velocity; dilation latency, duration, and velocity; and initial, maximum, minimum, and average pupil diameters. Results. Forty-two right eyes of 42 patients were enrolled. Postoperative uncorrected distance visual acuity was better than or equal to 20/20 in all eyes. Compared to preoperative values, disk halo size showed no significant difference at 1 week postoperatively (P>0.05) and then decreased significantly at 1 and 3 months postoperatively (both P<0.001). Contraction amplitude and velocity, as well as dilation velocity, decreased significantly at all postoperative time points (all P<0.001). Disk halo size at 3 months postoperatively was significantly correlated with initial (r = 0.446, P=0.003), maximum (r = 0.483, P=0.001), minimum (r = 0.425, P=0.005), and average pupil diameters (r = 0.474, P=0.002). Conclusions. After ICL V4c implantation, disk halo size was reduced in the short term. Patients with smaller pupil sizes during pupillary response to light experienced smaller halos after ICL V4c implantation.

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