Results 21 to 30 of about 5,698 (205)

Pupillometry Reveals the Role of Arousal in a Postexercise Benefit to Executive Function

open access: yesBrain Sciences, 2021
A single bout of aerobic exercise improves executive function; however, the mechanism(s) underlying this improvement remains unclear. Here, we employed a 20-min bout of aerobic exercise, and at pre- and immediate post-exercise sessions examined executive
Naila Ayala, Matthew Heath
doaj   +1 more source

Cognitive and Ocular Factors Jointly Determine Pupil Responses under Equiluminance.

open access: yesPLoS ONE, 2016
Changes in pupil diameter can reflect high-level cognitive signals that depend on central neuromodulatory mechanisms. However, brain mechanisms that adjust pupil size are also exquisitely sensitive to changes in luminance and other events that would be ...
Tomas Knapen   +5 more
doaj   +1 more source

Tonic and phasic transcutaneous auricular vagus nerve stimulation (taVNS) both evoke rapid and transient pupil dilation

open access: yesBrain Stimulation
Background: Transcutaneous auricular vagus nerve stimulation (tVNS or taVNS) is a non-invasive method of electrical stimulation of the afferent pathway of the vagus nerve, suggested to drive changes in putative physiological markers of noradrenergic ...
Lina Skora   +2 more
doaj   +1 more source

Tonic Pupil Following Traumatic Hyphema: Case Report

open access: yesTürk Oftalmoloji Dergisi, 2013
A 7-year-old girl was admitted to our clinic after crash injury with air gun pellet in her right eye. There was an intense anterior chamber reaction and hyphema on the biomicroscopic examination. During the control examination after treatment of hyphema
Şaban Gönül   +4 more
doaj   +1 more source

Morphometric study of the ciliary ganglion and its pertinent intraorbital procedure

open access: yesFolia Morphologica, 2020
BACKGROUND: Ciliary ganglion (CG) can be easily injured without notice in many intraorbital procedures. Surgical procedures approaching the lateral side of the orbit are at risk of CG injury which results in transient mydriasis and tonic pupil.
L. Tesapirat   +2 more
doaj   +1 more source

A Rare Case in the Emergency Department: Holmes-Adie Syndrome

open access: yesTurkish Journal of Emergency Medicine, 2015
SUMMARY: Holmes-Adie syndrome (HAS) is a rare syndrome characterized by tonic pupil and the absence of deep tendon reflexes. HAS was first described in 1931 and is usually idiopathic, with incidences reported to be 4-7 per 100,000.
Sahin COLAK   +6 more
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

open access: yesFEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Microbiome‐blood–brain barrier interactions in aging — mechanisms and therapeutic potential

open access: yesFEBS Letters, EarlyView.
Aging reshapes the gut microbiome (↓SCFA‐producing commensals; ↑pro‐inflammatory outputs), shifting circulating metabolites (↓SCFAs; ↑LPS, ↑TMAO, ↑PAA) that act at the BBB to increase nonspecific transcytosis, alter transport, and promote astrocyte reactivity, heightening brain vulnerability.
Daniel Cuervo‐Zanatta   +3 more
wiley   +1 more source

Tonic Pupil and Corneal Anesthesia after Vitrectomy and Encircling Band for Retinal Detachment in an Ex-Premature Child

open access: yesCase Reports in Ophthalmology, 2010
An 11-year-old boy presented with a total retinal detachment in his right eye. He had a bilateral 360° argon laser treatment for an active retinopathy of prematurity performed after his birth.
Xavier Valldeperas   +3 more
doaj   +1 more source

Dissociable mappings of tonic and phasic pupillary features onto cognitive processes involved in mental arithmetic.

open access: yesPLoS ONE, 2020
Pupil size modulations have been used for decades as a window into the mind, and several pupillary features have been implicated in a variety of cognitive processes.
Russell A Cohen Hoffing   +5 more
doaj   +1 more source

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