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https://www.readbyqxmd.com/read/29346029/unifying-visual-space-across-the-left-and-right-hemifields
#1
Zhimin Chen, Anna Kosovicheva, Benjamin Wolfe, Patrick Cavanagh, Andrei Gorea, David Whitney
Visual space is perceived as continuous and stable even though visual inputs from the left and right visual fields are initially processed separately within the two cortical hemispheres. In the research reported here, we examined whether the visual system utilizes a dynamic recalibration mechanism to integrate these representations and to maintain alignment across the visual fields. Subjects adapted to randomly oriented moving lines that straddled the vertical meridian; these lines were vertically offset between the left and right hemifields...
January 1, 2018: Psychological Science
https://www.readbyqxmd.com/read/29344496/quadruple-neoplasms-following-radiation-therapy-for-congenital-bilateral-retinoblastoma
#2
Linda J Szymanski, Maria E Sibug Saber, Jonathan W Kim, John L Go, Gabriel Zada, Narsing Rao, Kyle M Hurth
Purpose: The aim of this study was to describe a 34-year-old male with hereditary bilateral retinoblastoma treated with radiotherapy as a child who developed 4 distinct tumors within the radiation field. Methods: A 34-year-old male with bilateral retinoblastoma status postradiation therapy and recurrence requiring enucleation presented with left-eye visual acuity changes. Magnetic resonance imaging demonstrated a left orbital mass and a right parasellar complex lobulated mass (right sphenoid and right cavernous sinus)...
December 2017: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/29342012/diffuse-chorioretinopathy-without-serous-detachment-associated-with-cardiac-transplantation
#3
Michael F Marmor
PURPOSE: To analyze an unusual case of widespread chorioretinopathy after cardiac transplantation for its potential etiology and clinical significance. METHODS: Clinical examinations included widefield and macular color and fundus autofluorescence photography, spectral domain optical coherence tomography, fluorescein angiography and indocyanine green angiography, full-field electroretinography, and Goldmann visual fields. PATIENT: A 44-year-old Hispanic woman was referred to rule out retinitis pigmentosa...
January 16, 2018: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/29341906/lateralization-of-mother-infant-interactions-in-wild-horses
#4
Karina Karenina, Andrey Giljov, Yegor Malashichev
The manifestation of behavioural lateralization has been shown to be modified by environmental conditions, life experiences, and selective breeding. This study tests whether the lateralization recently found in feral domestic horse (Equus caballus) is evident in undomesticated horses. Mother-offspring interactions were investigated in Przewalski's horse (E. ferus przewalskii) living in their natural habitat in Mongolia. Lateral position preferences during mare-foal spontaneous reunions were used as a behavioural marker of visual lateralization...
January 13, 2018: Behavioural Processes
https://www.readbyqxmd.com/read/29339960/which-differences-in-priming-effect-between-neglect-and-hemianopia-a-case-description-of-a-bilateral-brain-lesioned-patient
#5
Matteo Sozzi, Stefania Bianchi Marzoli, Lisa Melzi, Massimo Corbo, Irene Venturella, Michela Balconi
It is widely known that visuospatial neglect and hemianopia maybe superimposed. We considered the differences in implicit information processing which is effective in patients with neglect but not with hemianopia. We then hypothesize that a prime-word in the neglected field should determine a semantic activation effect but not in a blind hemifield. Moreover eye movements could provide further details. In this work we considered a patient with a bilateral with the presence of either a left visual neglect and a right homonymous hemianopia...
October 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/29337211/extraperitoneal-para-aortic-lymphadenectomy-by-robot-assisted-laparoscopy
#6
Ana Gomes da Costa, Yves Borghesi, Delphine Hudry, Julie Faes, Lucie Bresson, Fabrice Narducci, Eric Leblanc
STUDY OBJECTIVE: The aim of this study was to evaluate the outcomes of extraperitoneal para-aortic lymphadenectomy by robot-assisted laparoscopy. DESIGN: A retrospective study (Canadian Task Force classification III). SETTING: An academic institution. PATIENTS: Twenty-three consecutive patients with gynecologic cancer who presented for para-aortic lymphadenectomy between March 2016 and May 2017 were reviewed retrospectively...
January 11, 2018: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/29335882/clinical-response-to-vim-s-thalamic-stereotactic-radiosurgery-for-essential-tremor-is-associated-with-distinctive-functional-connectivity-patterns
#7
Constantin Tuleasca, Elena Najdenovska, Jean Régis, Tatiana Witjas, Nadine Girard, Jérôme Champoudry, Mohamed Faouzi, Jean-Philippe Thiran, Meritxell Bach Cuadra, Marc Levivier, Dimitri Van De Ville
INTRODUCTION: Essential tremor (ET) is the most common movement disorder. Drug-resistant ET can benefit from standard surgical stereotactic procedures (deep brain stimulation, thalamotomy) or minimally invasive high-intensity focused ultrasound (HIFU) or stereotactic radiosurgical thalamotomy (SRS-T). Resting-state fMRI (rs-fMRI) is a non-invasive imaging method acquired in absence of a task. We examined whether rs-fMRI correlates with tremor score on the treated hand (TSTH) improvement 1 year after SRS-T...
January 15, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29325129/transaortic-septal-myectomy-using-direct-septal-echography
#8
Kanji Matsuzaki, Toru Tsukada, Masataka Sato, Yasunori Watanabe
We applied direct septal echography in transaortic septal myectomy for left ventricular outflow tract obstruction due to hypertrophic obstructive cardiomyopathy and asymmetric septal hypertrophy. A small L-shaped probe was inserted into the right ventricle through a 2-cm incision on the right ventricular outflow tract. The probe was placed directly on the interventricular septum to visualize its actual thickness. It was also helpful to push and expose the septum into a direct field of vision through the aortic annulus...
January 8, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29324073/rapid-improvement-on-a-temporal-attention-task-within-a-single-session-of-high-frequency-transcranial-random-noise-stimulation
#9
Sarah C Tyler, Federica Contò, Lorella Battelli
This study explored the modulatory effects of high-frequency transcranial random noise stimulation (tRNS) on visual sensitivity during a temporal attention task. We measured sensitivity to different onset asynchronies during a temporal order judgment task as a function of active stimulation relative to sham. While completing the task, participants were stimulated bilaterally for 20 min over either the TPJ or the human middle temporal area. We hypothesized that tRNS over the TPJ, which is critical to the temporal attention network, would selectively increase cortical excitability and induce cognitive training-like effects on performance, perhaps more so in the left visual field [Matthews, N...
January 11, 2018: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/29322583/motor-imagery-training-kinesthetic-imagery-strategy-and-inferior-parietal-fmri-activation
#10
Florent Lebon, Ulrike Horn, Martin Domin, Martin Lotze
Motor imagery (MI) is the mental simulation of action frequently used by professionals in different fields. However, with respect to performance, well-controlled functional imaging studies on MI training are sparse. We investigated changes in fMRI representation going along with performance changes of a finger sequence (error and velocity) after MI training in 48 healthy young volunteers. Before training, we tested the vividness of kinesthetic and visual imagery. During tests, participants were instructed to move or to imagine moving the fingers of the right hand in a specific order...
January 10, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29321941/hygienic-measures-during-animal-transport-to-abattoirs-a-status-quo-analysis-of-the-current-cleaning-and-disinfection-of-animal-transporters-in-germany
#11
Luisa Weber, Diana Meemken
Background: The process of cleaning and disinfection of animal transport vehicles after unloading animals at the abattoir is a critical control point regarding proper hygiene. It is an important step regarding the biosecurity. In the present study, a status quo analysis of the currently performed cleaning and disinfection measures of animal transport vehicles was carried out at the vehicle washing facilities of five different industrial abattoirs in Germany. For this purpose, a checklist was developed and validated to assess the washing procedure of transport vehicles in a standardised way...
2018: Porcine Health Management
https://www.readbyqxmd.com/read/29321249/facing-each-other-mammal-mothers-and-infants-prefer-the-position-favouring-right-hemisphere-processing
#12
Andrey Giljov, Karina Karenina, Yegor Malashichev
The right hemisphere plays a crucial role in social processing. Human mothers show a robust left cradling/holding bias providing greater right-hemispheric involvement in the exchange of social information between mother and infant. Here, we demonstrate that a similar bias is evident in face-to-face spatial interactions in marine and terrestrial non-primate mammals. Walruses and Indian flying foxes showed a significant population-level preference for the position which facilitates the use of the left visual field in both mother and infant...
January 2018: Biology Letters
https://www.readbyqxmd.com/read/29311603/attentional-gain-is-modulated-by-probabilistic-feature-expectations-in-a-spatial-cueing-task-erp-evidence
#13
Anna Marzecová, Antonio Schettino, Andreas Widmann, Iria SanMiguel, Sonja A Kotz, Erich Schröger
Several theoretical and empirical studies suggest that attention and perceptual expectations influence perception in an interactive manner, whereby attentional gain is enhanced for predicted stimuli. The current study assessed whether attention and perceptual expectations interface when they are fully orthogonal, i.e., each of them relates to different stimulus features. We used a spatial cueing task with block-wise spatial attention cues that directed attention to either left or right visual field, in which Gabor gratings of either predicted (more likely) or unpredicted (less likely) orientation were presented...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29311140/visual-short-term-memory-activity-in-parietal-lobe-reflects-cognitive-processes-beyond-attentional-selection
#14
Summer L Sheremata, David C Somers, Sarah Shomstein
Visual attention and short-term memory (VSTM) are distinct yet inter-related processes. While both require selection of information across the visual field, memory additionally requires maintenance of information across time and distraction. VSTM recruits areas within human (male and female) dorsal and ventral parietal cortex that are also implicated in spatial selection, therefore, it is important to determine if overlapping activation might reflect shared attentional demands. Here, identical stimuli and controlled sustained attention across both tasks were used to ask whether fMRI signal amplitude, functional connectivity, and contralateral visual field bias reflect memory-specific task demands...
January 8, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29310395/delayed-onset-of-pressure-induced-interlamellar-stromal-keratitis-in-a-patient-with-recurrent-uveitis-a-case-report
#15
Che-Yuan Kuo, Yu-Fan Chang, Yu-Bai Chou, Chih-Chien Hsu, Pei-Yu Lin, Catherine Jui-Ling Liu
INTRODUCTION: Corticosteroid treatment for uveitis can lead to delayed-onset pressure-induced interlamellar stromal keratitis (PISK), even years after laser in situ keratomileusis (LASIK).A 35-year-old man presented to our clinic after experiencing blurred vision in his left eye for 1 month. For the past month, he had been prescribed topical steroid and anti-glaucomatous medication. He had undergone LASIK for both eyes 5 years earlier, and had suffered uveitis attacks in his left eye over the last 2 years...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29286373/central-and-divided-visual-field-presentation-of-emotional-images-to-measure-hemispheric-differences-in-motivated-attention
#16
Aminda J O'Hare, Ruth Ann Atchley, Keith M Young
Two dominant theories on lateralized processing of emotional information exist in the literature. One theory posits that unpleasant emotions are processed by right frontal regions, while pleasant emotions are processed by left frontal regions. The other theory posits that the right hemisphere is more specialized for the processing of emotional information overall, particularly in posterior regions. Assessing the different roles of the cerebral hemispheres in processing emotional information can be difficult without the use of neuroimaging methodologies, which are not accessible or affordable to all scientists...
November 16, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29260112/persistent-pseudomyopia-following-a-whiplash-injury-in-a-previously-emmetropic-woman
#17
Fintan E Hughes, Maxwell P Treacy, Emma S Duignan, Paul B Mullaney
Purpose: Accommodative spasm, which manifests as ciliary muscle spasm, convergent strabismus or miosis, is a recognised consequence of head trauma. In whiplash cases, cervical spine hyperextension poses a risk of contra-coup injury and brainstem trauma, and is known to affect the visual system. However, to date, no cases of accommodative spasm due to whiplash injury have been reported. Observations: We present the case of a 34-year-old female who developed sudden onset blurred distance vision after a rear impact car crash, having previously been emmetropic...
December 2017: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29260108/unilateral-pigmented-paravenous-retinochoroidal-atrophy-with-retinitis-pigmentosa-in-the-contralateral-eye-a-case-report
#18
Shuichiro Aoki, Tatsuya Inoue, Mari Kusakabe, Masaya Fukushima, Kohdai Kitamoto, Asako Ogawa, Motoshi Yamamoto, Ryo Obata
Purpose: We describe a sporadic case of unilateral pigmented paravenous retinochoroidal atrophy (PPRCA) with retinitis pigmentosa (RP) in the contralateral eye. Observations: a 24-year-old female aware of the narrowing of visual field was examined at our hospital. Funduscopic examination revealed left eye showing retinochroidal atrophy along the retinal veins with pigment accumulation while right eye showing peripheral diffuse retinal pigmented epithelium atrophy with bone spicule pigmentation...
December 2017: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29260044/isolated-presumed-optic-nerve-gumma-a-rare-presentation-of-neurosyphilis
#19
Nailyn Rasool, James A Stefater, Dean Eliott, Dean M Cestari
Purpose: The incidence of syphilitic infections continues to rise and represents a major public health concern, particularly in patients co-infected with human immunodeficiency virus (HIV). The infection has a multitude of clinical presentations and is often referred to as the 'great imitator.' We present a rare case of an isolated presumed syphilitic optic nerve gumma and characterize it using newer imaging modalities. Observations: A 36-year-old HIV-positive man, compliant with treatment, presented with a five day history of decreased vision in the left eye...
June 2017: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29260024/unihemispheric-central-nervous-system-vasculitis
#20
Sikawat Thanaviratananich, Bashar Katirji
Patients with primary central nervous system vasculitis (PCNSV) usually manifest with multiple enhancing bilateral hemispheric lesions. We presented an extremely rare clinical course and follow-up of a patient with PCNSV affecting only a single (right) hemisphere. A 33-year-old previously healthy man presented with a left hand clonic seizure followed by a secondary generalized tonic-clonic seizure and dysarthria. MRI brain revealed multiple hyperintense lesions confined to only the right hemisphere with contrast enhancement, involving both white and grey matters...
June 2017: ENeurologicalSci
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