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https://www.readbyqxmd.com/read/28915256/optical-coherence-tomography-angiography-of-the-peripapillary-capillaries-in-primary-open-angle-and-normal-tension-glaucoma
#1
Ryoko Igarashi, Shun Ochiai, Yuta Sakaue, Aki Suetake, Ryu Iikawa, Testuya Togano, Fuuko Miyamoto, Daiki Miyamoto, Takeo Fukuchi
OBJECTIVES: To evaluate the vascular architecture of the radial peripapillary capillaries (RPCs) and its relation with visual function in patients with open-angle glaucoma (OAG) and normal-tension glaucoma using spectral-domain optical coherence tomography (SD-OCT) angiography. SUBJECTS AND METHODS: Clear OCT angiography images of blood vessels in the optic disc and peripapillary retina were obtained from 52 patients (52 eyes) aged 55.42±10.64 (range 28-72) years with primary OAG...
2017: PloS One
https://www.readbyqxmd.com/read/28914820/indoor-positioning-system-based-on-a-psd-detector-precise-positioning-of-agents-in-motion-using-aoa-techniques
#2
David Rodríguez-Navarro, José Luis Lázaro-Galilea, Álvaro De-La-Llana-Calvo, Ignacio Bravo-Muñoz, Alfredo Gardel-Vicente, Georgios Tsirigotis, Juan Iglesias-Miguel
Here, we present an indoor positioning system (IPS) for detecting mobile agents based on a single Position Sensitive Device sensor (PSD) sited in the environment and InfraRed Emitter Diode (IRED) located on mobile agents. The main goal of the work is to develop an alternative IPS to other sensing technologies, cheaper, easier to install and with a low computational load to obtain a high rate of measurements per second. The proposed IPS has the capacity to accurately determine 3D position from the angle of arrival (AoA) of the signal received at the PSD sensor...
September 15, 2017: Sensors
https://www.readbyqxmd.com/read/28901543/role-of-mhealth-in-overcoming-the-occurrence-of-post-stroke-depression
#3
REVIEW
J J Miranda, M G Moscoso, M Toyama, V Cavero, F Diez-Canseco, B Ovbiagele
Depression associated with stroke affects roughly one-third of stroke survivors. Post-stroke depression (PSD) is thought to adversely influence functional outcome by limiting participation in rehabilitation, decreasing physical, social, and cognitive function, and affecting neuroplasticity thereby placing stroke survivors at high risk for future vascular events. PSD has also been associated with higher mortality rates after stroke. In Peru, a country where there is no national stroke program and mental health disorders are largely underdiagnosed and untreated, people with PSD are likely to be further challenged by dependency and impoverished conditions that will limit their use of ambulatory services, leading to inadequate clinical follow-up...
September 13, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28901367/effects-of-developmental-arsenite-exposure-on-hippocampal-synapses-in-mouse-offspring
#4
Fenghong Zhao, Yingjun Liao, Hongge Tang, Jie Piao, Gaoyang Wang, Yaping Jin
Arsenic exposure through drinking water can impair the learning and memory ability of children in China and other countries. Synaptic plasticity plays a key role in the process of learning and memory. Alterations in the expression of presynaptic and postsynaptic proteins can be used to evaluate synaptic plasticity, and further to evaluate impairment in learning and memory ability. Thereby, the aim of this study was to explore the mechanisms underlying arsenic neurotoxicity by focusing on alterations in the hippocampal synapses of mouse offspring induced by developmental arsenite exposure...
September 13, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28888982/disrupting-nnos-psd-95-coupling-in-the-hippocampal-dentate-gyrus-promotes-extinction-memory-retrieval
#5
Jun Li, Zhou Han, Bo Cao, Cheng-Yun Cai, Yu-Hui Lin, Fei Li, Hai-Ying Wu, Lei Chang, Chun-Xia Luo, Dong-Ya Zhu
Granule cells in the dentate gyrus regenerate constantly in adult hippocampus and then integrate into neural circuits in the hippocampus thereby providing the neural basis for learning and memory. Promoting the neurogenesis in the hippocampus facilitates learning and memory such as spatial learning, object identification, and extinction learning. The interaction between neuronal nitric oxide synthase (nNOS) and postsynaptic density protein-95 (PSD-95) is reported to negatively regulate neurogenesis in brain, so we hypothesized that disrupting this interaction might facilitate the neurogenesis in the dentate gyrus (DG) and thus enhance the extinction memory retrieval of fear learning...
September 6, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28882411/prenatal-stress-induced-impairments-of-cognitive-flexibility-and-bidirectional-synaptic-plasticity-are-possibly-associated-with-autophagy-in-adolescent-male-offspring
#6
Hui Zhang, Yingchun Shang, Xi Xiao, Mei Yu, Tao Zhang
Prenatal stress (PS) brings numerous outcomes on offspring, including anxiety, depression-like behavior and other cognitive disorder. In this study, a rat model of PS was established by using restraint stress for 45min three times per day from the 15th to 21st day of pregnancy. Behavioral tests, including open field test (OPT), elevated plus-maze (EPM) and Morris water-maze (MWM), were performed in adolescent male-offspring. The bidirectional synaptic plasticity, including long-term potential (LTP) and depotentiation (DEP), from the hippocampal Schaffer collaterals to CA1 region was subsequently measured...
September 4, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28880744/the-effects-of-phenylethanoid-glycosides-derived-from-herba-cistanche-on-cognitive-deficits-and-antioxidant-activities-in-male-samp8-mice
#7
Jian-Xin Jia, Xu-Sheng Yan, Zhi-Ping Cai, Wei Song, Dong-Sheng Huo, Bai-Feng Zhang, He Wang, Zhan-Jun Yang
Cognitive deficits are closely associated with hippocampal synaptic changes. Phenylethanoid glycosides (PhG), derived from Herba cistanche, are known to exert protective effects on cognitive deficits in Alzheimer's disease (AD); however, the underlying mechanisms of this herbal extract on cognitive performance remain unclear. The aim of this study was thus to examine the protective mechanism attributed to PhG on cognitive deficits in an AD senescence accelerated mouse prone 8 (SAMP8) model. Cognitive deficit parameters examined included (1) Morris water maze (MWM) assessing cognitive performance and (2) quantification of dendritic spine density in hippocampal CA1 region by Golgi staining, a molecular biomarker of synaptic function...
September 7, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28880086/adsorption-and-photodesorption-of-co-from-charged-point-defects-on-tio2-110
#8
Rentao Mu, Arjun Dahal, Zhi-Tao Wang, Zdenek Dohnalek, Greg A Kimmel, Nikolay G Petrik, Igor Lyubinetsky
The adsorption and photochemistry of CO on rutile TiO2(110) are studied with scanning tunneling microscopy (STM), temperature-programmed desorption and angle-resolved photon-stimulated desorption (PSD) at low temperatures. Site occupancies, when weighted by the concentration of each kind of adsorption site on the reduced surface, show that the adsorption probability is the highest for the bridging oxygen vacancies (VO). The probability distribution for the different adsorption sites corresponds to very small differences in CO adsorption energies (< 0...
September 7, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28872738/chronic-post-stroke-oropharyngeal-dysphagia-is-associated-with-impaired-cortical-activation-to-pharyngeal-sensory-inputs
#9
C Cabib, O Ortega, N Vilardell, L Mundet, P Clavé, L Rofes
BACKGROUND AND PURPOSE: The role of afferent sensory pathways in the pathophysiology of post-stroke oropharyngeal dysphagia is not known. We hypothesized that patients with chronic post-stroke dysphagia (PSD) would show impaired sensory cortical activation in the ipsilesional hemisphere. METHODS: We studied 28 chronic unilateral post-stroke patients [17 PSD and 11 post-stroke non-dysphagic patients (PSnD)] and 11 age-matched healthy volunteers. Event-related sensory-evoked potentials to pharyngeal stimulation (pSEP) and sensory thresholds were assessed...
September 5, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28869625/phase-composition-and-morphology-characteristics-of-ceria-stabilized-zirconia-powders-obtained-via-sol-gel-method-with-various-ph-conditions
#10
Damian S Nakonieczny, Zbigniew K Paszenda, Marcin Basiaga, Tomasz Radko, Sabina Drewniak, Jacek Podwórny, Wojciech Bogacz
PURPOSE: High purity, fine crystalline, degradation-free at low temperature powders have attracted special interest in CAD/CAM prosthetic dentistry full ceramic restorations. This study reports the preparation and characterisation of zirconia-ceria (0.9 ZrO2 0.1 CeO2) powders. Materials were obtained from zirconium-n-alkoxide and cerium nitrate hexahydrate in the pH 2-4 and 8-10. METHODS: Zirconia- ceria powders were obtained with the sol-gel method in a humid-free environment...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28869464/oxygen-and-glucose-deprivation-alter-synaptic-distribution-of-tau-protein-the-role-of-phosphorylation
#11
Panagiota Mavroeidi, Olga Mavrofrydi, Elpiniki Pappa, Myrto Panopoulou, Panagiota Papazafiri, Sylva Haralambous, Spiros Efthimiopoulos
Alterations in tau synaptic distribution are considered to underlie synaptic dysfunction observed in Alzheimer's disease (AD). In the present study, brain blood hypoperfusion was simulated in mouse brain slices, and tau levels and phosphorylation were investigated in total extracts, as well as in postsynaptic density fractions (PSDs) and non-PSDs obtained through differential extraction and centrifugation. Oxygen deprivation (OD) resulted in tau dephosphorylation at several AD-related residues and activation of GSK3β and phosphatase PP2A...
August 30, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28863943/the-effect-of-testing-reliability-on-visual-field-sensitivity-in-normal-eyes-the-singapore-chinese-eye-study
#12
Nicholas Y Q Tan, Yih-Chung Tham, Victor Koh, Duc Quang Nguyen, Carol Y Cheung, Tin Aung, Tien Yin Wong, Ching-Yu Cheng
PURPOSE: To quantitatively determine how the reliability indices in standard automated perimetry (SAP) affect the global indices of visual field (VF) results in nonglaucomatous eyes. DESIGN: Observational, cross-sectional study. PARTICIPANTS: A total of 830 adults aged 40 to 80 years, without visual impairment, glaucoma, significant cataract, and major eye diseases, were selected from the population-based Singapore Chinese Eye Study (SCES)...
August 29, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28861798/real-time-quaking-induced-conversion-for-diagnosis-of-prion-disease
#13
Katsuya Satoh, Ryuichiro Atarashi, Noriyuki Nishida
Sporadic human prion diseases are defined on the basis of clinical features, with periodic sharp discharge (PSD) on electroencephalograms (EEG), a positive 14-3-3 protein assay of CSF samples, and abnormal signals on cerebral cortex on diffusion-weighted (DWI) MR images. It is essential to detect the abnormal prion protein in neuropathological or immunochemical detection of brain tissues when we diagnose definite cases for human prion disease. We performed definite diagnosis of sporadic human prion disease in alive patients...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28861754/estrogen-receptor-%C3%AE-mediated-neuroprotective-efficacy-of-cicer-microphyllum-seed-extract-in-global-hypoxia
#14
Deepti Sharma, Surya Narayan Biswal, Kushal Kumar, Pushpendar Bhardwaj, Kalpana Kumari Barhwal, Ashish Kumar, Sunil Kumar Hota, Om Prakash Chaurasia
Hypoxia induced oxidative stress and neurodegeneration in the hippocampus has been implicated for memory impairment in conditions like stroke, ischemia and hypobaric hypoxia. The present study, aimed at investigating the potential of ethanolic extract of Cicer microphyllum seeds (CSE) for amelioration of global hypoxia induced neurodegeneration in CA1 region of hippocampus. CSE supplementation considerably reduced neurodegeneration and dendritic atrophy in CA1 neurons along with improvement of memory in hypoxic rats...
August 31, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28858806/a-novel-nonlinear-dynamic-method-for-stroke-rehabilitation-effect-evaluation-using-eeg
#15
Hong Zeng, Guojun Dai, Wanzeng Kong, Fangyue Chen, Luyun Wang
Evaluating the effect of stroke rehabilitation based on electroencephalogram (EEG) is still a challenging problem. This paper presents a novel nonlinear dynamic complexity method for the evaluation of stroke rehabilitation effect from EEG signal. Our method calculates the nonlinearly separable degree (NLSD) of EEG signal, and then employs an indicator, called Mean Nonlinearly Separable complexity Degree (Mean_NLSD), to efficiently and accurately evaluate therapy effect of stroke patients. Our study under twelve stimuli conditions on eleven patients and eleven control subjects indicates that in general Mean_NLSD is smaller at the lesion regions and that the Mean_NLSD of the control subjects is stochastic...
August 25, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28857286/proximal-suspensory-desmopathy-in-hindlimbs-magnetic-resonance-imaging-gross-post-mortem-and-histological-study
#16
S Dyson, M J Pinilla, N Bolas, R Murray
BACKGROUND: There have been no previous studies correlating high-field magnetic resonance imaging (MRI) findings with gross and histological post mortem examination in horses with hindlimb proximal suspensory desmopathy (PSD). OBJECTIVES: To determine if adhesions between the suspensory ligament (SL) and adjacent tissues could be detected using high-field MRI and if collagen, adipose tissue and muscle pathology could be differentiated. STUDY DESIGN: Retrospective study...
August 30, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28854520/neuroplasticity-and-behavioral-effects-of%C3%A2-fluoxetine-after-experimental-stroke
#17
Yefei Sun, Xiaoyu Sun, Huiling Qu, Shanshan Zhao, Ting Xiao, Chuansheng Zhao
The brain can undergo self-repair and has the ability to compensate for functions lost after a stroke. The plasticity of the ischemic brain is influenced by several factors including aging and pharmacotherapy. Fluoxetine is an antidepressant which enhances serotonergic neurotransmission through selective inhibition of neuronal reuptake of serotonin. In clinical practice, fluoxetine alleviates the symptoms of post-stroke depression (PSD), helps motor recovery in stroke patients. In animal experiments, chronic administration of fluoxetine induces increased excitability of mature granule cells (GCs), enhancing axonal and dendritic reorganization, as well as promoting neurogenesis or angiogenesis in the dentate gurus (DG), but the effect of fluoxetine in the subventricular zone (SVZ) remains controversial...
August 24, 2017: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/28851230/post-stroke-depression-as-a-predictor-of-caregivers-burden-of-acute-ischemic-stroke-patients-in-china
#18
Dong-Mei Dou, Ling-Ling Huang, Jin Dou, Xiao-Xiao Wang, Pei-Xi Wang
Our aim was to explore the independent attribution of Post-stroke depression (PSD) to caregiver burden of acute ischemic stroke patients. A cross-sectional survey was performed with 271 acute ischemic stroke patients in the Huai-He Hospital and First People's Hospital of Kaifeng City in China. PSD was assessed by Self-rating Depressive Scale, and caregiver burden was assessed by Zarit Caregiver Burden Interview. Clustered logistic regression was applied to identify the impact of PSD on caregiver burden. As results, female patients, normal muscle strength and PSD were associated with caregiver burden...
August 29, 2017: Psychology, Health & Medicine
https://www.readbyqxmd.com/read/28844641/performance-of-an-ipad-application-to-detect-moderate-and-advanced-visual-field-loss-in-nepal
#19
Chris A Johnson, Suman Thapa, Yu Xiang George Kong, Alan L Robin
PURPOSE: To evaluate the accuracy and efficiency of Visual Fields Easy (VFE), a free iPad app, for performing suprathreshold perimetric screening. METHODS: We performed screening visual fields using a calibrated iPad 2 with the VFE application on 206 subjects (411 eyes): 210 normal (NL), 183 glaucoma (GL) and 18 diabetic retinopathy (DR) at Tilganga Institute of Ophthalmology, Kathmandu, Nepal. We correlated the results with a Humphrey Field Analyzer using 24-2 SITA Standard tests on 273 of these eyes (198 NL, 160 GL, 15 DR) RESULTS: The number of missed locations on the VFE correlated with Mean Deviation (MD, r=0...
August 24, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28844626/associations-of-tumor-necrosis-factor-%C3%AE-and-interleukin-1%C3%AE-levels-and-polymorphisms-with-post-stroke-depression
#20
Jae-Min Kim, Hee-Ju Kang, Ju-Wan Kim, Kyung-Yeol Bae, Sung-Wan Kim, Joon-Tae Kim, Man-Seok Park, Ki-Hyun Cho
OBJECTIVE: Proinflammatory cytokines have been implicated in the pathophysiology of post-stroke depression (PSD), and their production levels are influenced by the transcriptional activity of genetic polymorphisms. The present study aimed to investigate the roles of tumor necrosis factor (TNF)-α and interleukin (IL)-1β in the serum on the risk of PSD while taking into account the TNF-α -850C/T and -308G/A polymorphisms and the IL-1β -511C/T and +3953C/T polymorphisms. METHODS: A total of 286 patients were evaluated at 2 weeks post stroke and 222 (78%) of these patients were followed up 1 year later...
July 25, 2017: American Journal of Geriatric Psychiatry
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