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https://www.readbyqxmd.com/read/29125266/decision-making-in-very-severe-traumatic-brain-injury-glasgow-coma-scale-3-5-a-literature-review-of-acute-neurosurgical-management-of-the-most-severely-threatened-brain-trauma-patients
#1
Jeroen van Dijck, Florence Reith, Inge van Erp, Thomas van Essen, Andrew Maas, Wilco C Peul, Godard de Ruiter
BACKGROUND: Patients presenting with an early GCS score of 3-5 after blunt or penetrating skull-brain assaults are categorized as having sustained a very severe Traumatic Brain Injury (vs-TBI). This category is often overlooked in literature. Impact on patients and families lives however is huge and the question "whether to surgically treat or not" frequently poses a dilemma to treating physicians. Little is known about mortality and outcome, compared to what is known for the group of severe TBI patients (s-TBI) (GCS 3- 8)...
November 10, 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/29118500/iridoplasty-of-fixed-dilated-pupil-urrets-zavalia-syndrome-after-deep-anterior-lamellar-keratoplasty
#2
Efthalia Ntora, Nikolaos Ziakas
A 38-year-old woman with advanced keratoconus initially developed Urrets-Zavalia Syndrome (UZS) in the left eye after deep anterior lamellar keratoplasty. During the uneventful surgery, a 7-mm-wide pupil unresponsive to light was noticed. On the first postoperative day, intraocular pressure (IOP) was elevated up to 45 mmHg with shallow anterior chamber (AC). A peripheral iridotomy in 2 o'clock position was conducted and a fixed combination of brinzolamide 1% and timolol 0.5% was administered topically. In the subsequent postoperative period, IOP was successfully reduced, but the patient reported severe photophobia, glare, and decreased vision...
September 2017: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/29118499/causes-and-management-of-small-pupil-in-patients-with-cataract
#3
Ioannis Halkiadakis, Irini Chatziralli, Evangelos Drakos, Michail Katzakis, Sotirios Skouriotis, Eleni Patsea, Panagiotis Mitropoulos, Artemios Kandarakis
BACKGROUND: The purpose of the study was to present the causes and management of small pupil (<6 mm) in Greek patients with cataract. METHODS: About 1144 consecutive patients with cataract comprised the study group. The pupil size was measured after maximal dilation by means of Rosenbaum cards and Colvard pupillometer. Dilation regimen included phenylephrine 10%, tropicamide 1%, cyclopentolate 1%, and ketorolac trometamol 0.5% administered 3 times at 5 min intervals starting 1 h before surgery...
September 2017: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/29117062/relations-between-self-reported-daily-life-fatigue-hearing-status-and-pupil-dilation-during-a-speech-perception-in-noise-task
#4
Yang Wang, Graham Naylor, Sophia E Kramer, Adriana A Zekveld, Dorothea Wendt, Barbara Ohlenforst, Thomas Lunner
OBJECTIVE: People with hearing impairment are likely to experience higher levels of fatigue because of effortful listening in daily communication. This hearing-related fatigue might not only constrain their work performance but also result in withdrawal from major social roles. Therefore, it is important to understand the relationships between fatigue, listening effort, and hearing impairment by examining the evidence from both subjective and objective measurements. The aim of the present study was to investigate these relationships by assessing subjectively measured daily-life fatigue (self-report questionnaires) and objectively measured listening effort (pupillometry) in both normally hearing and hearing-impaired participants...
November 7, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/29116367/double-blind-comparison-of-the-two-hallucinogens-psilocybin-and-dextromethorphan-similarities-and-differences-in-subjective-experiences
#5
Theresa M Carbonaro, Matthew W Johnson, Ethan Hurwitz, Roland R Griffiths
RATIONALE: Although psilocybin and dextromethorphan (DXM) are hallucinogens, they have different receptor mechanisms of action and have not been directly compared. OBJECTIVE: This study compared subjective, behavioral, and physiological effects of psilocybin and dextromethorphan under conditions that minimized expectancy effects. METHODS: Single, acute oral doses of psilocybin (10, 20, 30 mg/70 kg), DXM (400 mg/70 kg), and placebo were administered under double-blind conditions to 20 healthy participants with histories of hallucinogen use...
November 7, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/29109238/extensive-tonotopic-mapping-across-auditory-cortex-is-recapitulated-by-spectrally-directed-attention-and-systematically-related-to-cortical-myeloarchitecture
#6
Frederic K Dick, Matt I Lehet, Martina F Callaghan, Tim A Keller, Martin I Sereno, Lori L Holt
Auditory selective attention is vital in natural soundscapes. But, it is unclear how attentional focus on the primary dimension of auditory representation - acoustic frequency - might modulate basic auditory functional topography during active listening. In contrast to visual selective attention, which is supported by motor-mediated optimization of input across saccades and pupil dilation, the primate auditory system has fewer means of differentially sampling the world. This makes spectrally-directed endogenous attention a particularly crucial aspect of auditory attention...
November 6, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29107773/midfrontal-theta-and-pupil-dilation-parametrically-track-subjective-conflict-but-also-surprise-during-intertemporal-choice
#7
Hause Lin, Blair Saunders, Cendri A Hutcherson, Michael Inzlicht
Many everyday choices are based on personal, subjective preferences. When choosing between two options, we often feel conflicted, especially when trading off costs and benefits occurring at different times (e.g., saving for later versus spending now). Although previous work has investigated the neurophysiological basis of conflict during inhibitory control tasks, less is known about subjective conflict resulting from competing subjective preferences. In this pre-registered study, we investigated subjective conflict during intertemporal choice, whereby participants chose between smaller immediate versus larger delayed rewards (e...
October 28, 2017: NeuroImage
https://www.readbyqxmd.com/read/29107022/error-blindness-and-motivational-significance-shifts-in-networks-centering-on-anterior-insula-co-vary-with-error-awareness-and-pupil-dilation
#8
Helga A Harsay, Michael X Cohen, Marcus Spaan, Wouter D Weeda, Sander Nieuwenhuis, K Richard Ridderinkhof
This investigation aims to further our understanding of the brain mechanisms underlying the awareness of one's erroneous actions. While all errors are registered as such in the rostral cingulate zone, errors enter awareness only when the anterior insula cortex is activated. Aware but not unaware errors elicit autonomic nervous system reactivity. Our aim is to investigate the hypothesis that activation in the insula during error awareness is related to autonomic arousal and to inter-regional interactions with other areas of the brain...
October 26, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29103558/disease-and-surgery-of-the-equine-lens
#9
REVIEW
Wendy M Townsend
Examination of the lens is critical, particularly when evaluating horses with visual impairment or performing prepurchase examinations. To adequately evaluate the lens, the pupil must be pharmacologically dilated. A cataract is any lens opacity. The size, density, and position of a cataract determine the impact on vision. Cataracts may be congenital or inherited or occur secondary to trauma or equine recurrent uveitis. Surgical removal is the only treatment option for vision impairing cataracts, but careful selection of surgical candidates is critical for successful outcomes...
December 2017: Veterinary Clinics of North America. Equine Practice
https://www.readbyqxmd.com/read/29101073/malignant-cerebral-swelling-after-a-cranioplasty-a-case-report-and-literature-review
#10
Liang Shen, Yue Zhou, Jie Xu, Zhongzhou Su
BACKGROUND: Cranioplasty is considered a low-risk operation in the field of neurosurgery following decompression craniectomy (DC). Well-known complications after cranioplasty, such as infection, seizure, and titanium plate exposure, may not threaten the lives of patients. Unfortunately, there are many fatal complications that are under reported. In this study, we report a case and perform a literature review to introduce malignant cerebral swelling, which is regarded as a devastating complication...
October 28, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29096196/task-evoked-pupil-dilation-and-bold-variance-as-indicators-of-locus-coeruleus-dysfunction
#11
Jeremy A Elman, Matthew S Panizzon, Donald J Hagler, Lisa T Eyler, Eric L Granholm, Christine Fennema-Notestine, Michael J Lyons, Linda K McEvoy, Carol E Franz, Anders M Dale, William S Kremen
Pupillary responses during cognitive tasks are linked to functioning of the locus coeruleus (LC). The LC is an early site of abnormal tau deposition, which may contribute to key aspects of Alzheimer's disease (AD) pathophysiology. We previously found attenuation of pupillary responses to increases in cognitive load in individuals with mild cognitive impairment (MCI), suggesting pupillary responses may provide a biomarker of early risk for AD associated with LC dysfunction. The LC modulates cortical activity through two modes of operation: tonic and phasic...
October 7, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29094301/vertical-implantable-collamer-lens-icl-rotation-for-the-management-of-high-vault-due-to-lens-oversizing
#12
Francesco Matarazzo, Alexander Clifford Day, Luis Fernandez-Vega Cueto, Vincenzo Maurino
PURPOSE: To describe the good outcome of implantable collamer lens (ICL) rotation to reduce post-operative vault. METHODS: Retrospective analysis of case report. A 43-year-old woman had V4c EVO + myopic non-toric ICL implantation and post-operatively she presented with anisocoria and high vault. She underwent surgery to rotate the ICL 90 degrees to a vertical orientation. RESULTS: We achieved a reduction in the vault from 1020 to 486 μm after vertical ICL rotation...
November 1, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29082058/trichloroacetic-acid-ingestion-self-harm-attempt
#13
E R Black
OBJECTIVE: Trichloroacetic acid (TCAA), or trichloroethanoic acid, is a chemical analogue of acetic acid where three methyl group hydrogen atoms are replaced by chlorine. TCAAs are also abbreviated and referred to as TCAs, causing confusion with the psychiatric antidepressant drug class, especially among patients. TCAAs exist in dermatological treatments such as chemical peels or wart chemoablation medication. TCAA ingestion or overdose can cause gastric irritation symptoms including vomiting, diarrhea, or lassitude...
2017: Case Reports in Psychiatry
https://www.readbyqxmd.com/read/29079341/expectancy-modulates-pupil-size-during-endogenous-orienting-of-spatial-attention
#14
Alessio Dragone, Stefano Lasaponara, Mario Pinto, Francesca Rotondaro, Maria De Luca, Fabrizio Doricchi
fMRI investigations in healthy humans have documented phasic changes in the level of activation of the right temporal-parietal junction (TPJ) during cued voluntary orienting of spatial attention. Cues that correctly predict the position of upcoming targets in the majority of trials, i.e., predictive cues, produce higher deactivation of the right TPJ as compared with non-predictive cues. Since the right TPJ is the recipient of noradrenergic (NE) innervation, it has been hypothesised that changes in the level of TPJ activity are matched with changes in the level of NE activity...
October 3, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29076771/high-precision-piezo-ejection-ocular-microdosing-phase%C3%A2-ii-study-on-local-and-systemic-effects-of-topical-phenylephrine
#15
Tsontcho Ianchulev, Robert Weinreb, James C Tsai, Shan Lin, Louis R Pasquale
AIM: Conventional eyedropper-delivered volumes (25-50 µl) exceed the eye's usual tear-film volume (7 µl) and precorneal reservoir capacity, risking overflow and ocular/systemic complications. Piezoelectric high-precision microdosing may circumvent these limitations. Results & methodology: In this masked, nonrandomized, cross-over study, subjects (n = 12) underwent pupil dilation with topical phenylephrine (PE) administered by 32-µl eyedropper (2.5% or 10% formulation) and 8-µl electronic microdosing (10% formulation)...
October 27, 2017: Therapeutic Delivery
https://www.readbyqxmd.com/read/29059105/recent-advances-in-small-pupil-cataract-surgery
#16
Boris E Malyugin
PURPOSE OF REVIEW: To highlight the existing and emerging cataract surgery trends in patients with insufficient mydriasis. Discuss the latest pharmacological approaches for pre and intraoperative pupil dilatation. Present the variety of newest pupil expansion devices; critically review their advantages and possible limitations to be considered by the surgeon. RECENT FINDINGS: The intracameral use of various mydriatic combinations augmenting the preoperative mydriatic instillations is currently gaining popularity in cataract surgery...
October 20, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/29056302/single-pass-four-throw-pupilloplasty-postoperative-mydriasis-and-fundus-visibility-in-pseudophakic-eyes
#17
Dhivya Ashok Kumar, Amar Agarwal, Maheswari Srinivasan, Jyothi Narendrakumar, Akshaya Mohanavelu, Keerthana Krishnakumar
PURPOSE: To analyze the pharmacological mydriasis and the consequent fundus visibility after single-pass 4-throw pupilloplasty in pseudophakic eyes. SETTING: Dr. Agarwal's Eye Hospital, Chennai, India. DESIGN: Comparative case series. METHODS: Patients with bilateral pseudophakia with single-pass 4-throw pupilloplasty in 1 eye (study) and no single-pass 4-throw in the fellow eye (control) were included. The pupil measurements were analyzed before and after the instillation of mydriatics (tropicamide 0...
October 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29051563/women-s-self-rated-attraction-to-male-faces-does-not-correspond-with-physiological-arousal
#18
S Hagerman, Z Woolard, K Anderson, B W Tatler, F R Moore
There has been little work to determine whether attractiveness ratings of faces correspond to sexual or more general attraction. We tested whether a measure of women's physiological arousal (pupil diameter change) was correlated with ratings of men's facial attractiveness. In Study 1, women rated the faces of men for whom we also measured salivary testosterone. They rated each face for attractiveness, and for desirability for friendship and long- and short-term romantic relationships. Pupil diameter change was not related to subjective ratings of attractiveness, but was positively correlated with the men's testosterone...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29049405/differences-in-pupillary-light-reflex-between-optic-neuritis-and-ischemic-optic-neuropathy
#19
Yung Ju Yoo, Jeong-Min Hwang, Hee Kyung Yang
OBJECTIVES: To determine the differences in pupillary light reflex (PLR) between the acute and chronic phases of optic neuritis (ON) and nonarteritic anterior ischemic optic neuropathy (NAION). METHODS: The study included 30 patients with ON and 22 patients with NAION whose PLR were measured by a dynamic pupillometer (PLR-200; NeurOptics Inc., Irvine, USA). Age-matched controls included 58 healthy individuals with normal vision and optic nerve function. Pupil diameters, latency, constriction ratio, constriction velocity and dilation velocity were noted...
2017: PloS One
https://www.readbyqxmd.com/read/29047014/a-callosal-catastrophe-toxic-leukoencephalopathy-associated-with-thermogenic-weight-loss-supplement-use
#20
Zakraus K Mahdavi, Ram Narayan, Shraddha Mainali, Benjamin M Greenberg, Venkatesh Aiyagari, David L McDonagh
BACKGROUND: The use of weight loss drugs and dietary supplements is common, but safety profiles for these drugs are largely unknown. Reports of toxicity have been published, and the use of these agents should be considered in clinical differential diagnoses. METHODS: We report the case of a patient with toxic leukoencephalopathy and hyponatremia associated with oral consumption of a thermogenic dietary supplement and essential oils. RESULTS: A 30-year-old woman presented after 2 days of headache, blurred vision, photophobia, vomiting, and hand spasms...
October 18, 2017: Neurocritical Care
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