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https://www.readbyqxmd.com/read/29780940/colored-floaters-as-a-manifestation-of-digoxin-toxicity
#1
Lynn Shi, Linus D Sun, Jeffrey G Odel
Purpose: Since its report in one patient more than 70 years ago, digitalis-induced colored muscae volitantes have not surfaced again in the literature. We report here a case of digoxin induced colored floaters. Observations: An 89-year-old man on 0.25 mg digoxin daily developed visual hallucinations and colored floaters. He had floaters in the past but now they were in various colors including yellow, green, blue and red, though predominantly in yellow. These "weirdly" shaped little particles wiggled around as if in a viscous solution and casted shadows in his vision...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29780917/advanced-pigment-dispersion-glaucoma-secondary-to-phakic-intraocular-collamer-lens-implant
#2
Clara Ye, Cajal K Patel, Anna C Momont, Yao Liu
Purpose: We report a case of pigment dispersion glaucoma secondary to uncomplicated phakic intraocular collamer lens (ICL) (Visian ICL™, Staar Inc., Monrovia, CA) implant that resulted in advanced visual field loss. Observations: A 50-year-old man presented for routine follow-up status post bilateral phakic intraocular collamer lens (ICL) placement 8 years earlier. He was incidentally found to have a decline in visual acuity from an anterior subcapsular cataract and elevated intraocular pressure (IOP) in the left eye...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29775858/when-is-the-right-hemisphere-holistic-and-when-is-it-not-the-case-of-chinese-character-recognition
#3
Harry K S Chung, Jacklyn C Y Leung, Vienne M Y Wong, Janet H Hsiao
Holistic processing (HP) has long been considered a characteristic of right hemisphere (RH) processing. Indeed, holistic face processing is typically associated with left visual field (LVF)/RH processing advantages. Nevertheless, expert Chinese character recognition involves reduced HP and increased RH lateralization, presenting a counterexample. Recent modeling research suggests that RH processing may be associated with an increase or decrease in HP, depending on whether spacing or component information was used respectively...
May 15, 2018: Cognition
https://www.readbyqxmd.com/read/29771545/hemispheric-asymmetries-in-categorical-facial-expression-perception
#4
D Michael Burt, Markus Hausmann
Although many sensory phenomena vary continuously, humans tend to divide them into discrete categories with facial expressions being divided into categories such as happy, sad, anger, and fear. A critical effect of category use is categorical perception: same sized physical differences are better perceived if the difference occurs between two categories rather than within the same category. Here we investigate the lateralization of categorical perception of facial expressions. Categorical perception of facial expressions may be lateralized to the right hemisphere due to the intimacy of basic, possibly universal and innate, prototypical facial expression categories and face processing which is predominantly lateralized to the right hemisphere...
May 17, 2018: Emotion
https://www.readbyqxmd.com/read/29771362/rates-of-cerebral-protein-synthesis-in-primary-visual-cortex-during-sleep-dependent-memory-consolidation-a-study-in-human-subjects
#5
Dante Picchioni, Kathleen C Schmidt, Kelly K McWhirter, Inna Loutaev, Adriana J Pavletic, Andrew M Speer, Alan J Zametkin, Ning Miao, Shrinivas Bishu, Kate M Turetsky, Anne S Morrow, Jeffrey L Nadel, Brittney C Evans, Diana M Vesselinovitch, Carrie A Sheeler, Thomas J Balkin, Carolyn B Smith
If protein synthesis during sleep is required for sleep-dependent memory consolidation, we might expect rates of cerebral protein synthesis (rCPS) to increase during sleep in the local brain circuits that support performance on a particular task following training on that task. To measure circuit-specific brain protein synthesis during a daytime nap opportunity, we used the L-[1-(11)C]leucine positron emission tomography (PET) method with simultaneous polysomnography. We trained subjects on the visual texture discrimination task (TDT)...
May 15, 2018: Sleep
https://www.readbyqxmd.com/read/29770532/novel-approaches-to-study-coronary-vasculature-development-in-mice
#6
Hana Kolesová, Martin Bartoš, Wan Chin Hsieh, Veronika Olejníčková, David Sedmera
BACKGROUND: Coronary artery development is an intensely studied field. Mice are a popular genetic model for developmental studies, but there is no widely accepted protocol for high-throughput, high-resolution imaging of their developmental and adult coronary artery anatomy. RESULTS: Using tissue clearing protocols and confocal microscopy, we have analyzed embryonic and juvenile mouse hearts in Cx40:GFP knock-in models with a special focus on septal artery development...
May 17, 2018: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/29770250/the-usefulness-of-indocyanine-green-during-surgery-for-hypervascular-posterior-fossa-tumors
#7
Takahiro Shinya, Hideki Nagamine, Ken-Ichi Sugawara, Shogo Ishiuchi
Background: Cerebral hemangioblastomas are benign tumors with abundant blood flow that occur mainly in the posterior fossa. Tumor removal en bloc is important in surgical treatment because of the risk of bleeding; however, it is actually rather difficult in practice. Therefore, we propose a surgical strategy for visualizing hypervascular tumors of the posterior fossa utilizing indocyanine green (ICG). Case Description: Case 1 involved a 48-year-old male with a history of von Hippel-Lindau (VHL) disease...
2018: Surgical Neurology International
https://www.readbyqxmd.com/read/29766586/awareness-is-related-to-reduced-post-stimulus-alpha-power-a-no-report-inattentional-blindness-study
#8
Anthony M Harris, Paul E Dux, Jason B Mattingley
Delineating the neural correlates of sensory awareness is a key requirement for developing a neuroscientific understanding of consciousness. A neural signal that has been proposed as a key neural correlate of awareness is amplitude reduction of 8-14 Hz alpha oscillations. Alpha oscillations are also closely linked to processes of spatial attention, providing potential alternative explanations for past results associating alpha oscillations with awareness. We employed a no-report inattentional blindness (IB) paradigm with electroencephalography to examine the association between awareness and the power of 8-14 Hz alpha oscillations...
May 15, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29753019/psychophysical-and-neuroimaging-responses-to-moving-stimuli-in-a-patient-with-the-riddoch-phenomenon-due-to-bilateral-visual-cortex-lesions
#9
Michael J Arcaro, Lore Thaler, Derek J Quinlan, Simona Monaco, Sarah Khan, Kenneth F Valyear, Rainer Goebel, Gordon N Dutton, Melvyn A Goodale, Sabine Kastner, Jody C Culham
Patients with injury to early visual cortex or its inputs can display the Riddoch phenomenon: preserved awareness for moving but not stationary stimuli. We provide a detailed case report of a patient with the Riddoch phenomenon, MC. MC has extensive bilateral lesions to occipitotemporal cortex that include most early visual cortex and complete blindness in visual field perimetry testing with static targets. Nevertheless, she shows a remarkably robust preserved ability to perceive motion, enabling her to navigate through cluttered environments and perform actions like catching moving balls...
May 9, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29748046/the-visibility-of-the-terminal-thoracic-duct-into-the-venous-system-using-mr-thoracic-ductography-with-balanced-turbo-field-echo-sequence
#10
Takakiyo Nomura, Tetsu Niwa, Soji Ozawa, Junya Oguma, Shuhei Shibukawa, Yutaka Imai
RATIONALE AND OBJECTIVES: Magnetic resonance thoracic ductography (MRTD) with balanced turbo field echo (bTFE) can visualize both the thoracic duct and its surrounding vessels. This study aimed to investigate the visibility of the terminal thoracic duct into the venous system in the subclavian region using MRTD with bTFE. MATERIALS AND METHODS: MRTD was performed with bTFE as a preoperative workup comprising respiratory gating on a 1.5-T magnetic resonance system for patients with esophageal cancer...
May 7, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29737101/-quantitative-measurements-on-the-blood-flow-fields-of-left-atrial-appendage-using-vector-flow-mapping-in-patients-with-nonvalvular-atrial-fibrillation
#11
Yu-Yan Cai, Xin Wei, Xiao-Ling Zhang, Gu-Yue Liu, Xi Li, Hong Tang
OBJECTIVE: To quantify the hemodynamic characteristics of patients with nonvalvular atrial fibrillation. METHODS: Twenty patients with paroxysmal atrial fibrillation and 15 patients with persistent atrial fibrillation enrolled in this study,while 12 patients with sinus rhythms served as controls. The hemodynamic characteristics of the patients in left atrial appendage were measured by transesophageal echocardiography (TEE) and vector flow mapping (VFM) using indicators such as vectors,vortex and energy loss (EL)...
January 2018: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29725293/female-advantage-in-automatic-change-detection-of-facial-expressions-during-a-happy-neutral-context-an-erp-study
#12
Qi Li, Shiyu Zhou, Ya Zheng, Xun Liu
Sex differences in conscious emotional processing represent a well-known phenomenon. The present event-related potential (ERP) study examined sex differences in the automatic change detection of facial expressions, as indexed by the visual mismatch negativity (vMMN). As paid volunteers, 19 females and 19 males were presented peripherally with a passive emotional oddball sequence in a happy-neutral context and a fearful-neutral context while they performed a visual detection task in the center of the visual field...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29718927/predictive-saccades-in-children-and-adults-a-combined-fmri-and-eye-tracking-study
#13
Katerina Lukasova, Mariana P Nucci, Raymundo Machado de Azevedo Neto, Gilson Vieira, João R Sato, Edson Amaro
Saccades were assessed in 21 adults (age 24 years, SD = 4) and 15 children (age 11 years, SD = 1), using combined functional magnetic resonance imaging (fMRI) and eye-tracking. Subjects visually tracked a point on a horizontal line in four conditions: time and position predictable task (PRED), position predictable (pPRED), time predictable (tPRED) and visually guided saccades (SAC). Both groups in the PRED but not in pPRED, tPRED and SAC produced predictive saccades with latency below 80 ms. In task versus group comparisons, children's showed less efficient learning compared to adults for predictive saccades (adults = 48%, children = 34%, p = 0...
2018: PloS One
https://www.readbyqxmd.com/read/29718332/endoscopic-endonasal-transmaxillary-transshpenoidal-approach-for-excision-of-a-superior-orbital-fissure-cavernous-sinus-meningioma-2-dimensional-operative-video
#14
Ehab El Refaee, Steffen Fleck, Marc Matthes, Henry W S Schroeder
We present a 43-old-male who suffered from a slowly progressive loss of vision in the left eye. Magnetic resonance (MR) imaging revealed a well-circumscribed contrast-enhancing lesion in the region of the anterior cavernous sinus and superior orbital fissure that extended into the optic canal. A schwannoma or meningioma was suspected. A transcranial surgery performed at another institution was not successful in removing the tumor and further deterioration of vision occurred. After resection of the left middle turbinate, the sphenoid and maxillary sinus were opened...
April 28, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29717412/visual-recognition-of-mirrored-letters-and-the-right-hemisphere-advantage-for-mirror-invariant-object-recognition
#15
Matthew T Harrison, Lars Strother
Unlike most objects, letter recognition is closely tied to orientation and mirroring, which in some cases (e.g., b and d), defines letter identity altogether. We combined a divided field paradigm with a negative priming procedure to examine the relationship between mirror generalization, its suppression during letter recognition, and language-related visual processing in the left hemisphere. In our main experiment, observers performed a centrally viewed letter-recognition task, followed by an object-recognition task performed in either the right or the left visual hemifield...
May 1, 2018: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/29707391/the-effect-of-patient-characteristics-and-sleep-quality-on-visual-field-performance-reliability
#16
Swarup S Swaminathan, Matthew B Greenberg, Elizabeth A Vanner, Kara M Cavuoto, Sarah R Wellik, Ta Chen Chang
Purpose: To investigate the association of automated visual field (VF) reliability indices (false positive [FP], false negative [FN], and fixation loss [FL]) and sleep quality, VF experience, and age. Methods: Prospective, cross-sectional study. Adult patients (age ≥ 18 years) completing automated VF testing were invited to participate. Baseline participant characteristics were obtained, and all participants were asked to complete the Pittsburgh Sleep Quality Index (PSQI) questionnaire...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29705618/change-in-drawing-placement-a-measure-of-change-in-mood-state-reflective-of-hemispheric-lateralization-of-emotion
#17
Tracy R Butler, Erin M O'Mara, Josephine F Wilson
The Valence Hypothesis of cerebral lateralization of emotion suggests greater right hemisphere activation during negative mood and greater left hemisphere activation during positive mood. This can manifest as visual field attentional bias. Here, study participants completed an assessment of current mood state (PANAS) and made a drawing (Drawing 1). To induce positive or negative mood, participants played a game; then, the winner read a script depicting a positive interpersonal interaction and the loser read a script depicting a negative interpersonal interaction...
April 26, 2018: Brain and Cognition
https://www.readbyqxmd.com/read/29705174/a-sticky-situation
#18
Christina Y Weng, Karima S Khimani, Rod Foroozan, Sidney M Gospe, M Tariq Bhatti
An 81-year-old man with bilateral progressively blurry vision and optic disc swelling was referred for evaluation. Examination and ancillary testing confirmed a diagnosis of bilateral vitreopapillary traction (VPT) accompanied by unilateral tractional retinoschisis in the right eye. Pars plana vitrectomy was performed to release the traction in both eyes. Visual acuity improved in the right eye and stabilized in the left eye. Retinoschisis in the right eye resolved. The visual field improved in both eyes, although the left eye demonstrated a persistent hemifield defect likely attributable to a prior optic neuropathy...
April 26, 2018: Survey of Ophthalmology
https://www.readbyqxmd.com/read/29701373/uniportal-vats-lobectomy-subxiphoid-approach
#19
Catarina Carvalheiro, Javier Gallego-Poveda, Diego Gonzalez-Rivas, Jorge Cruz
INTRODUCTION: Interest in uniportal video-assisted thoracic surgery (VATS) is rapidly growing worldwide because it represents the surgical approach to the lung with the least possible trauma and in recent years the subxiphoid approach has been used in the field of thoracic surgery as it is associated with lesser pain because there is no intercostal nerve damage and it provides excellent cosmetic outcomes. This technique was recently introduced for major pulmonary resections and even bilateral approaches in selected patients...
July 2017: Revista Portuguesa de Cirurgia Cardio-torácica e Vascular
https://www.readbyqxmd.com/read/29698039/reading-direction-influences-lateral-biases-in-letter-processing
#20
Kim Ransley, Patrick T Goodbourn, Elizabeth H L Nguyen, Ahmed A Moustafa, Alex O Holcombe
Humans have a limited capacity to identify concurrent, briefly presented targets. Recent experiments using concurrent rapid serial visual presentation of letters in horizontally displaced streams have documented a deficit specific to the stream in the right visual field. The cause of this deficit might be either prioritization of the left item based on participants' experience reading from left to right, or a right-hemisphere advantage specific to dual stimulation. Here we test the reading-experience hypothesis by using participants who have experience reading both a language written left-to-right (English) and one written right-to-left (Arabic)...
April 26, 2018: Journal of Experimental Psychology. Learning, Memory, and Cognition
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