Results 41 to 50 of about 3,447,725 (137)
Feature Extraction and Pupil Size Detection of Pupillary Light Reflex in Opiate Addicts [PDF]
, 2011 An effective algorithm for detecting pupil size based on image processing was established. Three features reflecting differences between opiate addicts and normal subjects in pupillary light reflex were extracted by applying this algorithm, including ...
Shi, Yun-Tao +4 more
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BMC AnesthesiologyBackground The pupillary response to tetanic electrical stimulation reflects the balance between nociceptive stimulation and analgesia. Although pupillary pain index (PPI) was utilized to predict postoperative pain, it depended on tetanic stimulation and
Huang Huang +7 more
doaj +1 more source
Human pupillary light reflex during successive irradiation with 1-ms blue- and green-pulsed light
Journal of Physiological Anthropology, 2017 Background In the human retina, the contribution of intrinsically photosensitive retinal ganglion cells (ipRGCs) to the regulation of the pupillary response remains poorly understood.
Soomin Lee +3 more
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The effect of opioids on the light-off pupillary reflex
Journal of Anesthesia, Analgesia and Critical CareObjective We examined the relationship between modeled opioid concentration and quantitative pupillary measures during remifentanil infusion sequences with particular attention to the “light-off” (LO) reflex. Methods Ten volunteer subjects were recruited
Rachel Eshima McKay, Merlín D. Larson
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The Form and Function of Retinal Ganglion Cells in Diabetes
CellsThis review examines how diabetes affects the ganglion cells of the retina, including the axons that make up the optic nerve. Links between established changes in the morphology of retinal ganglion cells (RGCs) and vision loss, as well as other functions,
Alistair J. Barber
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Invisible light inside the natural blind spot alters brightness at a remote location
Scientific Reports, 2018 The natural blind spot in the visual field has been known as a large oval region that cannot receive any optical input because it corresponds to the retinal optic disk containing no rod/cone-photoreceptors. Recently, stimulation inside the blind spot was
Marina Saito +3 more
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Journal of Ophthalmology, 2018 Purpose. To investigate the relationship between transient pupillary light reflex (PLR) and visual function in patients with retinitis pigmentosa (RP). Methods. A retrospective study was performed with 137 eyes of 73 patients with RP. Transient pupillary
Yan He +5 more
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Evaluation of two portable pupillometers to assess clinical utility
Concussion, 2020 Background: Pupillometers have been proposed as clinical assessment tools. We compared two pupillometers to assess measurement agreement. Materials & methods: We enrolled 30 subjects and simultaneously measured the pupil diameter and light reflex ...
Rachel Eshima McKay +3 more
doaj +1 more source
The Role of TASK-3 Two-Pore Domain Potassium Channels in the Entrainment of Mammalian Circadian Rhythms [PDF]
, 2014 In mammals light is the principal timing cue for alignment of physiology to the external environment. Illumination from the unrelenting 24-hour day-night cycle enters the biological system and is communicated to the master pacemaker, the suprachiasmatic
Atkinson, Lynsey A
core
Influence of Strategic Cortical Infarctions on Pupillary Function
Frontiers in Neurology, 2018 Objective: Cortical activity, including cognitive and emotional processes, may influence pupillary function. The exact pathways and the site of cortical pupillary innervation remain elusive, however. We investigated the effects of select cortical strokes,
Costanza Peinkhofer +12 more
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