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https://www.readbyqxmd.com/read/29786008/an-unexpected-complication-in-bilateral-acute-iris-transillumination-cystoid-macular-edema
#1
Cigdem Altan, Berna Basarir, Cem Kesim
A 47-year-old male presented with bilateral 4 + circulating pigment in the anterior chamber, diffuse iris transillumination, dilated pupils unresponsive to light, and high intraocular pressure (IOP) levels in both eyes. Visual acuity and IOP improved bilaterally with topical steroid and antiglaucomatous therapy. In the 10th month, bilateral cystoid macular edema (CME) was developed and resolved after subtenon triamcinolone injections. CME recurred after cataract surgery in the right eye which was treated with intravitreal dexamethasone implant injection...
June 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29780925/ocular-involvement-in-neurolymphomatosis
#2
Katy C Liu, Meridith A Hennessey, Chad M McCall, Alan D Proia
Purpose: To describe the ophthalmic symptoms and histopathological findings in a case of primary neurolymphomatosis (NL). Observations: A man in his 60s with a prior diagnosis of chronic inflammatory demyelinating polyneuropathy developed facial numbness, diplopia, drooling, and difficulty swallowing. Over a 3-month period, he developed total ptosis and ophthalmoplegia of the right eye with a dilated, non-reactive pupil considered secondary to cranial nerve III and VI palsies...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29779607/impact-of-snr-masker-type-and-noise-reduction-processing-on-sentence-recognition-performance-and-listening-effort-as-indicated-by-the-pupil-dilation-response
#3
Barbara Ohlenforst, Dorothea Wendt, Sophia E Kramer, Graham Naylor, Adriana A Zekveld, Thomas Lunner
Recent studies have shown that activating the noise reduction scheme in hearing aids results in a smaller peak pupil dilation (PPD), indicating reduced listening effort, at 50% and 95% correct sentence recognition with a 4-talker masker. The objective of this study was to measure the effect of the noise reduction scheme (on or off) on PPD and sentence recognition across a wide range of signal-to-noise ratios (SNRs) from +16 dB to -12 dB and two masker types (4-talker and stationary noise). Relatively low PPDs were observed at very low (-12 dB) and very high (+16 dB to +8 dB) SNRs presumably due to 'giving up' and 'easy listening', respectively...
May 6, 2018: Hearing Research
https://www.readbyqxmd.com/read/29769452/acute-glaucoma-attack-following-microvascular-decompression-surgery-for-trigeminal-neuralgia
#4
Kenichi Amagasaki, Masami Nagayama, Saiko Watanabe, Naoyuki Shono, Hiroshi Nakaguchi
Microvascular decompression (MVD) is widely accepted as an effective surgical method to treat trigeminal neuralgia (TN), but the risks of morbidity and mortality must be considered. We experienced a case of acute angle-closure glaucoma attack following MVD for TN in an elderly patient, considered to be caused by lateral positioning during and after the surgery. A 79-year-old female underwent MVD for right TN in the left lateral decubitus position, and TN disappeared after the surgery. Postoperatively, the patient tended to maintain the left lateral decubitus position to prevent wound contact with the pillow, even after ambulation...
May 17, 2018: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/29756058/pupillary-dilation-reflex-and-pupillary-pain-index-evaluation-during-general-anaesthesia-a-pilot-study
#5
Davina Wildemeersch, Michiel Baeten, Natasja Peeters, Vera Saldien, Marcel Vercauteren, Guy Hans
Background: Pupillary response by pupillary dilatation reflex (PDR) is a robust reflex, even measurable during general anaesthesia. However, the ability of infrared pupillometry to detect PDR differences obtained by intraoperative opioid administration in anaesthesized patients remains largely unknown. We analyzed the performance of automated infrared pupillometry in detecting differences in pupillary dilatation reflex response by a inbuilt standardized nociceptive stimulation program in patients under general anesthesia with a standardized propofol/fentanyl scheme...
April 2018: Romanian Journal of Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/29738357/assessment-of-pupillary-autonomic-functions-by-dynamic-pupillometry-in-different-circadian-arterial-blood-pressure-patterns
#6
Sercan Okutucu, Mustafa Civelekler, Hakan Aksoy, Begum Yetis Sayin, Ali Oto
OBJECTIVE: The aim of the present cross-sectional study was to evaluate the autonomic nervous system by dynamic pupillometry (DP) in normotensive and hypertensive individuals with either a non-dipper-type or a dipper-type circadian rhythm of blood pressure (BP). PATIENTS AND METHODS: A total of 80 patients were allocated into four groups: normotensive/dipper (n=23), normotensive/nondipper (n=19), hypertensive/dipper (n=18), and hypertensive/nondipper (n=20). Pupil diameters (R0, R1, R2, and R%): latency (Lc), amplitude (Ac), velocity (Vc), and duration (Tc) of pupil contraction: latency (Ld), velocity (Vd), and duration (Td) of pupil dilatation were measured by DP...
May 5, 2018: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/29737476/differential-effects-of-brain-death-on-rat-microcirculation-and-intestinal-inflammation-female-versus-male
#7
Sueli Gomes Ferreira, Roberto Armstrong-Jr, Guilherme Konishi Kudo, Cristiano de Jesus Correia, Sabrina Thalita Dos Reis, Paulina Sannomiya, Ana Cristina Breithaupt-Faloppa, Luiz Felipe Pinho Moreira
Brain death (BD) affects organs by multiple mechanisms related to hemodynamic effects, hormonal changes, and the systemic inflammatory response, which reduce organ function and viability. BD reduces microcirculatory perfusion in rat mesentery; this disturbance is also observed in the pancreas and lungs. Sex hormones can affect microcirculatory function, altering tissue perfusion and influencing the inflammatory process. Here, we present differences between sexes in the microcirculatory alterations generated by BD and in inflammatory infiltrate...
May 8, 2018: Inflammation
https://www.readbyqxmd.com/read/29733957/disentangling-reward-anticipation-with-simultaneous-pupillometry-fmri
#8
Max Schneider, Laura Leuchs, Michael Czisch, Philipp G Sämann, Victor I Spoormaker
The reward system may provide an interesting intermediate phenotype for anhedonia in affective disorders. Reward anticipation is characterized by an increase in arousal, and previous studies have linked the anterior cingulate cortex (ACC) to arousal responses such as dilation of the pupil. Here, we examined pupil dynamics during a reward anticipation task in forty-six healthy human subjects and evaluated its neural correlates using functional magnetic resonance imaging (fMRI). Pupil size showed a strong increase during monetary reward anticipation, a moderate increase during verbal reward anticipation and a decrease during control trials...
May 4, 2018: NeuroImage
https://www.readbyqxmd.com/read/29732214/ten-years-of-intraoperative-floppy-iris-syndrome-in-the-era-of-%C3%AE-blockers
#9
REVIEW
Andreas Lunacek, Badereddin Mohamad Al-Ali, Christian Radmayr, Maria Weber, Wolfgang Horninger, Oliver Findl, Eugen Plas
Introduction: The use of alpha-1 receptor antagonists in the treatment of benign prostatic hyperplasia (BPH) has created a problem in ophthalmic surgery, the so-called intraoperative floppy iris syndrome (IFIS). This consists of a billowing iris, insufficient pupillary dilation with progressive intraoperative miosis, and protrusion of iris tissue through the tunnel and side port incision that are made for access to the anterior chamber during surgery. IFIS presents particular difficulties in cataract surgery which is carried out through the pupil with manipulations in the immediate vicinity of the iris...
2018: Central European Journal of Urology
https://www.readbyqxmd.com/read/29720610/association-between-pupil-dilation-and-implicit-processing-prior-to-object-recognition-via-insight
#10
Yuta Suzuki, Tetsuto Minami, Shigeki Nakauchi
Insight refers to the sudden conscious shift in the perception of a situation following a period of unconscious processing. The present study aimed to investigate the implicit neural mechanisms underlying insight-based recognition, and to determine the association between these mechanisms and the extent of pupil dilation. Participants were presented with ambiguous, transforming images comprised of dots, following which they were asked to state whether they recognized the object and their level of confidence in this statement...
May 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29719642/oct-based-macular-thickness-in-a-normal-indian-pediatric-population
#11
Bharti Nigam, Pragati Garg, Lubna Ahmad, Ritika Mullick
Purpose: Cirrus optical coherence tomography (OCT) provides high resolution cross-sectional images of the retina, vitreous humor, and optic nerve head with an axial resolution of 5 μm and a reproducibility of 1.6 μm. An integrated normative database is available only for adult subjects ≥18 years of age; the normal reference ranges of the macular thicknesses of pediatric subjects are not available. The purpose of this study was to determine the normal reference range of macular thickness of pediatric...
April 2018: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/29703287/pupil-dilation-dynamics-with-an-intracameral-fixed-combination-of-mydriatics-and-anesthetic-during-cataract-surgery
#12
Frederic Chiambaretta, Uwe Pleyer, Anders Behndig, Pierre-Jean Pisella, Erik Mertens, Antonio Limao, Francesco Fasce, Joaquin Fernandez, Salah-Eddine Benmoussa, Marc Labetoulle, Beatrice Cochener
PURPOSE: To compare the pupil dynamics of an intracameral combination of 2 mydriatics and 1 anesthetic (Mydrane) to a standard topical regimen for cataract surgery. SETTING: Sixty-two centers in Europe and 6 centers in Algeria. DESIGN: Prospective case series. METHODS: Pupil size measurements were performed in 2 randomized studies (phase 2 and phase 3) under masked conditions (recorded videography, masked reading center)...
March 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29693475/transcranial-doppler-ultrasonography-cerebral-blood-flow-dynamics-study-of-neurosurgical-patients-in-peri-agonal-period-with-fixed-dilated-or-non-reacting-pupils
#13
Pratyush Shrestha, Safiur Rahman Ansari, Ram Kumar Ghimire, Dinesh Nath Gongal, Upendra Psd Devkota
INTRODUCTION: Fixed dilated and unreactive pupils are a harbinger of imminent death in neurosurgical patients, signifying that the brainstem is not functioning. Transcranial Doppler (TCD) ultrasonography is a noninvasive, bedside method of determining the flow velocities in the basal cerebral arteries, used extensively in various neurosurgical conditions. AIMS AND OBJECTIVES: To study the cerebral blood flow dynamics of neurosurgical patients in peri-agonal period with fixed dilated or non reacting pupils using TCD...
April 25, 2018: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/29692720/pupillary-response-to-cognitive-demand-in-parkinson-s-disease-a-pilot-study
#14
Melike Kahya, Sanghee Moon, Kelly E Lyons, Rajesh Pahwa, Abiodun E Akinwuntan, Hannes Devos
Previous studies have shown that pupillary response, a physiological measure of cognitive workload, reflects cognitive demand in healthy younger and older adults. However, the relationship between cognitive workload and cognitive demand in Parkinson's disease (PD) remains unclear. The aim of this pilot study was to examine the pupillary response to cognitive demand in a letter-number sequencing (LNS) task between 16 non-demented individuals with PD (age, median (Q1-Q3): 68 (62-72); 10 males) and 10 control participants (age: 63 (59-67); 2 males), matched for age, education, and Montreal Cognitive Assessment (MOCA) scores...
2018: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29685775/long-term-capsule-clarity-with-a-disk-shaped-intraocular-lens
#15
Joah Aliancy, Liliana Werner, Jason Ludlow, Jason Nguyen, Bryan Masino, Larry Ha, Nick Mamalis
PURPOSE: To evaluate long-term capsular clarity with a modified disk-shaped 1-piece hydrophilic acrylic monofocal intraocular lens (IOL) (Zephyr) suspended between 2 complete haptic rings connected by a pillar of the haptic material. SETTING: John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. DESIGN: Experimental study. METHODS: Study and control (1-piece hydrophobic acrylic) IOLs were implanted into the right and left eyes, respectively, of 8 New Zealand rabbits...
April 20, 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29685737/low-power-versus-medium-power-toric-intraocular-lenses-in-cataract-surgery-about-110-eyes
#16
A Mairot, H El Chehab, E Agard, A Rezkallah, V Bouteleux, C Dot
PURPOSE: To analyze the refractive predictability of low-power and medium-power toric intraocular lenses (IOL) during cataract surgery. METHODS: A retrospective case series. Patients with low and moderate degrees of astigmatism were treated with either an Alcon AcrySof IQ toric monofocal lens (SN6AT2 or SN6AT3) or a Zeiss toric monofocal lens (709 MP + 1 D or 709 MP + 1.5 D). They were divided into two groups: group 1 with low-power toric IOL (n = 40, SN6AT2 and 709 MP + 1), group 2 with medium-power toric IOL (n = 70, SN6AT3 and 709 MP + 1...
April 20, 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29682753/coupling-of-respiration-and-attention-via-the-locus-coeruleus-effects-of-meditation-and-pranayama
#17
Michael Christopher Melnychuk, Paul M Dockree, Redmond G O'Connell, Peter R Murphy, Joshua H Balsters, Ian H Robertson
The locus coeruleus (LC) has established functions in both attention and respiration. Good attentional performance requires optimal levels of tonic LC activity, and must be matched to task consistently. LC neurons are chemosensitive, causing respiratory phrenic nerve firing to increase frequency with higher CO2 levels, and as CO2 level varies with the phase of respiration, tonic LC activity should exhibit fluctuations at respiratory frequency. Top-down modulation of tonic LC activity from brain areas involved in attentional regulation, intended to optimize LC firing to suit task requirements, may have respiratory consequences as well, as increases in LC activity influence phrenic nerve firing...
April 22, 2018: Psychophysiology
https://www.readbyqxmd.com/read/29678713/posterior-fossa-epidural-hematomas-a-rare-but-serious-complication-of-occipito-cervical-fusion-surgery
#18
Chang Rong Zhu, Jianhua Wang, Dai Jianqiang, Kun Chen, Xia Hong
BACKGROUND: Posterior occipito-cervical fusion surgery is a commonly used surgical method to treat various craniovertebral junction pathologies. Though it is an effective method, there also have been some reports about complications of occipito-cervical fusion. However, there have been no reports about posterior fossa epidural hematomas after occipito-cervical fusion. CASE DESCRIPTION: A 44-year-old female was referred to our Hospital with a 6-month history of neck pain and numbness limbs for 2 months...
April 17, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29677335/the-eye-tracks-the-aesthetic-appeal-of-sentences
#19
Hideyuki Hoshi, Winfried Menninghaus
Eye-tracking parameters (fixation and pupillary responses) have been shown to be modulated by the aesthetic perception and evaluation of visual and auditory artworks (e.g., paintings, music). The present study investigated whether similar effects can be found in visual text processing. Participants read four groups of short sentences in which a key predictor of aesthetic liking, i.e., familiarity, was systematically modified to four degrees. Across all four groups, the sentences moreover varied with regard to featuring or not featuring meter...
March 1, 2018: Journal of Vision
https://www.readbyqxmd.com/read/29675071/pediatric-head-injury-a-study-of-403-cases-in-a-tertiary-care-hospital-in-a-developing-country
#20
Abrar Ahad Wani, Arif Hussain Sarmast, Muzaffar Ahangar, Nayil Khursheed Malik, Sarabjit Singh Chhibber, Sajad Hussain Arif, Altaf Umar Ramzan, Bashir Ahmed Dar, Zulfiqar Ali
Introduction: Traumatic brain injury (TBI) in children is a significant cause of morbidity and mortality worldwide. Falls are the most common type of injury, followed by motor vehicle-related accidents and child abuse. Aims and Objectives: The aim and objective of this study was to elucidate the various modes of injury, prognostic factors, complications, incidence of various modes of injury, and outcome in TBI in pediatric population. Materials and Methods: Patients with TBI, 18 years or less in age, managed in our Department of Neurosurgery, over a period of 2 years, were studied prospectively...
October 2017: Journal of Pediatric Neurosciences
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