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https://www.readbyqxmd.com/read/27905341/heidenhain-variant-of-creutzfeldt-jakob-disease-in-a-patient-who-had-bovine-bioprosthetic-valve-implantation
#1
Jehard Hashoul, Waleed Saliba, Irina Bloch, Haneen Jabaly-Habib
Creutzfeldt-Jakob disease (CJD) is a rare neurodegenerative disorder characterized by rapidly progressing dementia, general neurologic deterioration, and death. When the leading symptoms are visual disturbances, it is termed as the Heidenhain variant of CJD (HvCJD). CJD was reported following prion-contaminated pericardium transplants but never after bovine bioprosthetic cardiac valve. In this case report, we describe HvCJD in a patient who had a bovine bioprosthetic cardiac valve implant. An 82-year-old-woman was referred to neuro-ophthalmology clinic for unexplained visual loss that started 1 month previously...
October 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/27897668/global-enhancement-but-local-suppression-in-feature-based-attention
#2
Norman Forschack, Søren K Andersen, Matthias M Müller
A key property of feature-based attention is global facilitation of the attended feature throughout the visual field. Previously, we presented superimposed red and blue randomly moving dot kinematograms (RDKs) flickering at a different frequency each to elicit frequency-specific steady-state visual evoked potentials (SSVEPs) that allowed us to analyze neural dynamics in early visual cortex when participants shifted attention to one of the two colors. Results showed amplification of the attended and suppression of the unattended color as measured by SSVEP amplitudes...
November 29, 2016: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/27893769/assessing-visual-fields-in-patients-with-retinitis-pigmentosa-using-a-novel-microperimeter-with-eye-tracking-the-mp-3
#3
Nozomi Igarashi, Masato Matsuura, Yohei Hashimoto, Kazunori Hirasawa, Hiroshi Murata, Tatsuya Inoue, Obata Ryo, Makoto Aihara, Ryo Asaoka
PURPOSE: The purpose of the current study is to investigate the test-retest reproducibility of visual fields (VFs) measured with the MP-3 microperimeter, in patients with retinitis pigmentosa (RP). METHOD: VFs were twice measured with the MP-3 and also the Humphrey Field Analyzer, using the 10-2 test grid pattern in both perimeters, in 30 eyes (15 right and 15 left eyes) of 18 RP patients (11 males and 7 females). Test-retest reproducibility was assessed using the mean absolute deviation (MAD) measure at all 68 points in the test grid...
2016: PloS One
https://www.readbyqxmd.com/read/27893296/evaluation-of-visual-field-test-parameters-after-artificial-tear-administration-in-patients-with-glaucoma-and-dry-eye
#4
Pelin Özyol, Erhan Özyol, Aylin Karalezli
PURPOSE: To examine the effect of a single dose of artificial tear administration on automated visual field (VF) testing in patients with glaucoma and dry eye syndrome. MATERIAL AND METHODS: A total of 35 patients with primary open-angle glaucoma experienced in VF testing with symptoms of dry eye were enrolled in this study. At the first visit, standard VF testing was performed. At the second and third visits with an interval of one week, while the left eyes served as control, one drop of artificial tear was administered to each patient's right eye, and then VF testing was performed again...
November 28, 2016: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/27888087/coiling-of-a-ruptured-large-internal-carotid-aneurysm-via-extracranial-intracranial-saphenous-vein-bypass-graft-just-after-proximal-ligation-of-the-internal-carotid-artery
#5
Hayato Tajima, Yoshio Araki, Takashi Izumi, Masahiro Nishihori, Sho Okamoto, Toshihiko Wakabayashi
BACKGROUND: Direct and endovascular combined surgery has been performed to treat large to giant internal carotid artery (ICA) aneurysms. This report describes successful treatment of the large ICA aneurysm by coiling of the aneurysm via extracranial-intracranial (EC-IC) saphenous vein graft (SVG) just after bypass and ICA proximal ligation. CASE DESCRIPTION: A 66-year-old woman presented with left ICA supraclinoid aneurysm with progressive visual field defect and impaired visual acuity in the left eye...
November 22, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27886894/homonymous-hemianopia-and-vision-restoration-therapy
#6
REVIEW
Alexander Frolov, Jeanne Feuerstein, Prem S Subramanian
Homonymous hemianopia from stroke causes visual disability. Although some patients experience spontaneous improvement, others have limited to no change and may be left with a severe disability. Current rehabilitation strategies are compensatory and cannot restore function. Animal studies suggest that central nervous system plasticity could allow for redirection of lost visual function into undamaged areas of cortex. A commercial therapy system was developed, from which claims of visual field expansion were disputed by independent researchers...
February 2017: Neurologic Clinics
https://www.readbyqxmd.com/read/27875350/pediatric-glaucoma-review-of-recent-literature
#7
Annette Giangiacomo, Allen Beck
PURPOSE OF REVIEW: The purpose of this review is to update the clinician on the recent work in the field of pediatric glaucoma. RECENT FINDINGS: Using the iCare tonometer to measure intraocular pressure (IOP) in children is highly successful. New data from the Infant Aphakia Treatment Study shows that after 5 years of follow-up the risk of developing glaucoma is similar between patients that receive initial intraocular lens implantation and those who are left aphakic...
November 21, 2016: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/27861254/bilateral-diffuse-uveal-melanocytic-proliferation-associated-with-renal-cancer-the-importance-of-indocyanine-green-angiography-and-early-diagnosis
#8
Vinicius F Kniggendorf, Elmar T Neto, Elizabeth M Maia, Joao P S Grando, Anne M C Bardal, Patrícia M M Beato, Caroline C Torres, Mauricio Maia
PURPOSE: To report a case of bilateral diffuse uveal melanocytic proliferation associated with renal carcinoma and to illustrate the importance of ancillary examinations to early diagnosis and treatment. DESIGN: Clinical case report. METHODS: A 56-year-old man reported a 3-day history of visual impairment and scotoma in the right eye. An ophthalmoscopic examination, visual field test, fundus autofluorescence, fluorescein angiography, indocyanine green angiography, optical coherence tomography, and systemic evaluation were performed...
November 17, 2016: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/27855424/arts-brain-and-cognition
#9
Vida Demarin, Marina Roje Bedeković, Marijana Bosnar Puretić, Marija Bošnjak Pašić
Art is a product of human creativity; it is a superior skill that can be learned by study, practice and observation. Modern neuroscience and neuroimaging enable study of the processes during artistic performance. Creative people have less marked hemispheric dominance. It was found that the right hemisphere is specialized for metaphoric thinking, playfulness, solution finding and synthesizing, it is the center of visualization, imagination and conceptualization, but the left hemisphere is still needed for artistic work to achieve balance...
December 2016: Psychiatria Danubina
https://www.readbyqxmd.com/read/27848215/accuracy-and-limitations-of-vector-flow-mapping-left-ventricular-phantom-validation-using-stereo-particle-image-velocimetory
#10
Rei Asami, Tomohiko Tanaka, Ken-Ichi Kawabata, Kunio Hashiba, Takashi Okada, Tomohide Nishiyama
BACKGROUND: The accuracy of vector flow mapping (VFM) was investigated in comparison to stereo particle image velocimetry (stereo-PIV) measurements using a left ventricular phantom. VFM is an echocardiographic approach to visualizing two-dimensional flow dynamics by estimating the azimuthal component of flow from the mass-conservation equation. VFM provides means of visualizing cardiac flow, but there has not been a study that compared the flow estimated by VFM to the flow data acquired by other methods...
November 15, 2016: Journal of Echocardiography
https://www.readbyqxmd.com/read/27847584/character-decomposition-and-transposition-of-chinese-compound-words-in-the-right-and-left-visual-fields
#11
Hong-Wen Cao, Kai-Fu Yang, Hong-Mei Yan
This study investigated the character decomposition and transposition processes of Chinese two-character compound words (canonical and transposed words) and pseudowords in the right and left visual fields using a dual-target rapid serial visual presentation paradigm. The results confirmed a right visual field superiority for canonical words, but this advantage vanished for transposed words. The findings further indicated that the same quality of lexical processing could be obtained from the foveal and parafoveal regions of the right and left visual fields, regardless of the character order, but not in the periphery of the right visual field...
November 2016: I-Perception
https://www.readbyqxmd.com/read/27833926/bilateral-papilledema-in-a-child-with-osteogenesis-imperfecta
#12
Selam Yekta Sendul, Cemile Ucgul Atilgan, Semra Tiryaki, Dilek Guven
BACKGROUND: To present a female child patient with osteogenesis imperfecta who had bilateral papilledema. CASE PRESENTATION: A twelve-year-old girl with osteogenesis imperfecta was referred to our clinic. Bilateral best corrected visual acuity of the patient was 5/10 (corrected with +3.50 for right eye, +5.00 for left eye) with a standard Snellen scale at a distance of a 6 m. Anterior chamber, iris and lens examination of both of her eyes were unremarkable. In her fundus examination, bilateral stage 2 papilledema and the wrinkles in papillomacular area were noticed...
2016: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/27800277/objective-determination-of-retinal-function-in-bietti-crystalline-retinopathy
#13
Dorukcan Akıncıoğlu, Ümit Yolcu, Abdullah İlhan, Fatih Çakır Gündoğan
A 44-year-old female patient without any known systemic or ocular disease presented with progressive visual loss and night vision disturbance. Visual acuity was 0.6 in the right eye and 0.2 in the left eye. Tiny, yellow crystalline deposits were seen on fundus examination. In addition, areas of retinal pigment epithelium and choriocapillaris atrophy were detected. Rod and cone responses were depressed in full-field flash electroretinogram. Multifocal electroretinogram testing showed severe foveal function disturbance with less severe but still depressed responses toward the periphery...
June 2016: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/27784326/treatment-planning-and-evaluation-of-gated-radiotherapy-in-left-sided-breast-cancer-patients-using-the-catalyst-tm-sentinel-tm-system-for-deep-inspiration-breath-hold-dibh
#14
S Schönecker, F Walter, P Freislederer, C Marisch, H Scheithauer, N Harbeck, S Corradini, C Belka
BACKGROUND: There is a potential for adverse cardiovascular effects in long-term breast cancer survivors following adjuvant radiotherapy (RT). For this purpose, the deep inspiration breath-hold technique (DIBH) has been introduced into clinical practice, to maximally reduce the radiation dose to the heart. However, there are a variety of DIBH delivery techniques, patient positioning and visual patient feedback mechanisms. The aim of the present study was to evaluate the application of radiotherapy in DIBH using the Catalyst(TM)/Sentinel(TM) system, with a special emphasis on treatment planning and dosimetric plan comparison in free breathing (FB) and DIBH...
October 26, 2016: Radiation Oncology
https://www.readbyqxmd.com/read/27784274/preserved-retinal-sensitivity-in-spatial-correspondence-to-an-intrachoroidal-cavitation-area-with-full-thickness-retinal-defect-a-case-report
#15
Yoshiyuki Kita, Makoto Inoue, Gábor Hollό, Ritsuko Kita, Masahiko Sano, Akito Hirakata
BACKGROUND: Intrachoroidal cavitation (ICC) in the temporal peripapillary area is a relatively frequent finding in high myopia. However, ICC associated with a full thickness retinal defect rarely observed. We report an unusual case of ICC combined with a full thickness retinal defect in the papillo-macular bundle, in which the spatially corresponding visual field sensitivity was preserved. CASE PRESENTATION: A high myopic and pseudophakic left eye of a 79-year-old Japanese woman was evaluated with swept source optical coherence tomography (SS-OCT) and Humphrey 30-2 visual field testing for moderate glaucoma...
October 26, 2016: BMC Ophthalmology
https://www.readbyqxmd.com/read/27773906/lateral-geniculate-body-presenting-only-hemorrhage-homonymous-hemianopia-a-case-report
#16
Haruki Tokida, Yuhei Kanaya, Yutaka Shimoe, Shigeru Yamori, Koichi Tagawa, Masaru Kuriyama
We report a case of a 55-year-old man who developed acute-onset narrowing of his visual field. He showed right homonymous hemianopsia without any other neurological symptoms and signs. Brain CT and MRI showed localized hemorrhage (about 1.6 ml) in the left lateral geniculate body (LGB). A cerebral angiography showed no vascular anomalies of cerebral vessels, and the left anterior choroidal artery and left lateral posterior choroidal artery could be visualized well. He had hypertension, polycythemia and dyslipidemia and was a habitual smoker and an alcoholic...
November 29, 2016: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/27769327/characteristics-of-the-preferred-retinal-loci-of-better-and-worse-seeing-eyes-of-patients-with-a-central-scotoma
#17
Eli Kisilevsky, Luminita Tarita-Nistor, Esther G González, Mark S Mandelcorn, Michael H Brent, Samuel N Markowitz, Martin J Steinbach
OBJECTIVE: Patients with central vision loss develop preferred retinal loci (PRLs) in the eccentric retina. The characteristics of the PRLs for the better eye (BE) are well studied, but not those of the worse eye (WE). We examined the distribution of monocular PRLs in the visual field (VF), as well as visual acuity, fixation stability, and PRL eccentricity for the BE and WE of patients with central vision loss. DESIGN: Retrospective consecutive case series. PARTICIPANTS: A total of 87 BE and 50 WE of patients with central vision loss...
October 2016: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/27756671/intraoperative-subcortical-electrical-mapping-of-the-optic-tract-in-awake-surgery-using-virtual-reality-headset
#18
Edouard Mazerand, Marc Le Renard, Sophie Hue, Jean-Michel Lemee, Evelyne Klinger, Philippe Menei
BACKGROUND: Brain mapping during awake craniotomy is a well-known technique to preserve neurological functions, especially the language. It is still challenging to map the optic radiations due to the difficulty to test the visual field intraoperatively. OBJECTIVE: To assess the visual field during awake craniotomy, we developed the Functions' Explorer based on a Virtual Reality Headset (FEX-VRH). METHODS: The impaired visual field of ten patients was tested with the gold standard exam (an automated perimetry), and the FEX-VRH...
October 15, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27746345/face-gender-categorization-and-hemispheric-asymmetries-contrasting-evidence-from-connected-and-disconnected-brains
#19
Giulia Prete, Mara Fabri, Nicoletta Foschi, Luca Tommasi
We investigated hemispheric asymmetries in categorization of face gender by means of a divided visual field paradigm, in which female and male faces were presented unilaterally for 150ms each. A group of 60 healthy participants (30 males) and a male split-brain patient (D.D.C.) were asked to categorize the gender of the stimuli. Healthy participants categorized male faces presented in the right visual field (RVF) better and faster than when presented in the left visual field (LVF), and female faces presented in the LVF than in the RVF, independently of the participants' sex...
December 17, 2016: Neuroscience
https://www.readbyqxmd.com/read/27738402/a-pediatric-case-of-pituitary-macroadenoma-presenting-with-pituitary-apoplexy-and-cranial-nerve-involvement-case-report
#20
Mustafa Özçetin, Mehmet Karacı, Ertuğ Toroslu, Nurullah Edebali
Pituitary adenomas usually arise from the anterior lobe of the pituitary gland and are manifested with hormonal disorders or mass effect. Mass effect usually occurs in nonfunctional tumors. Pituitary adenomas may be manifested with visual field defects or rarely in the form of total oculomotor palsy. Visual field defect is most frequently in the form of bitemporal hemianopsia and superior temporal defect. Sudden loss of vision, papilledema and ophthalmoplegia may be observed. Pituitary apoplexy is defined as an acute clinical syndrome characterized with headache, vomiting, loss of vision, ophthalmoplegia and clouding of consciousness...
September 2016: Türk Pediatri Arşivi
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