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https://www.readbyqxmd.com/read/28433001/principal-cell-types-of-sleep-wake-regulatory-circuits
#1
REVIEW
Barbara E Jones
Electrophysiological recordings indicate that neurons which discharge maximally in association with distinct sleep-wake states are distributed through the brain, albeit in differing proportions. As studied using juxtacellular recording and labeling within the basal forebrain, four functional principal cell types are distinguished as: wake/paradoxical sleep (W/PS)-, slow wave sleep (SWS)-, W- and PS-max active. They are each comprised by both GABA and glutamate neurons, in addition to acetylcholine neurons belonging to the W/PS group...
April 19, 2017: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/28432360/functional-ectopic-neuritogenesis-by-retinal-rod-bipolar-cells-is-regulated-by-mir-125b-5p-during-retinal-remodeling-in-rcs-rats
#2
Yan Fu, Baoke Hou, Chuanhuang Weng, Weiping Liu, Jiaman Dai, Congjian Zhao, Zheng Qin Yin
Following retinal degeneration, retinal remodeling can cause neuronal microcircuits to undergo structural alterations, which particularly affect the dendrites of bipolar cells. However, the mechanisms and functional consequences of such changes remain unclear. Here, we used Royal College of Surgeon (RCS) rats as a model of retinal degeneration, to study structural changes in rod bipolar cells (RBCs) and the underlying mechanisms of these changes. We found that, with retinal degeneration, RBC dendrites extended into the outer nuclear layer (ONL) of the retina, and the ectopic dendrites formed synapses with the remaining photoreceptors...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28431164/low-activity-microstates-during-sleep
#3
Hiroyuki Miyawaki, Yazan N Billeh, Kamran Diba
Study Objectives: To better understand the distinct activity patterns of the brain during sleep, we observed and investigated periods of diminished oscillatory and population spiking activity lasting for seconds during non-REM sleep, which we call "LOW" activity sleep. Methods: We analyzed spiking and local field potential (LFP) activity of hippocampal CA1 region alongside neocortical electroencephalogram (EEG) and electromyogram (EMG) in 19 sessions from four male Long-Evans rats (262-363g) during natural wake/sleep across the 24-hr cycle, as well as data from other brain regions obtained from http://crcns...
April 18, 2017: Sleep
https://www.readbyqxmd.com/read/28430976/acute-and-chronic-noradrenergic-effects-on-cortical-excitability-in-healthy-humans
#4
Hsiao-I Kuo, Walter Paulus, Giorgi Batsikadze, Asif Jamil, Min-Fang Kuo, Michael A Nitsche
Background: Noradrenaline is a major neuromodulator in the central nervous system, and it is involved in the pathophysiology of diverse neuropsychiatric diseases. Previous transcranial magnetic stimulation (TMS) studies suggested that acute application of selective noradrenaline reuptake inhibitors (NRI) enhances cortical excitability in the human brain. However, other, such like clinical effects, usually require prolonged NRI treatment, which might go along with different physiological effects...
April 19, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28427672/current-status-and-future-perspectives-of-sonodynamic-therapy-in-glioma-treatment
#5
REVIEW
Xiaobing Wang, Yali Jia, Pan Wang, Quanhon Liu, Hairong Zheng
Malignant glioma is one of the most challenging central nervous system diseases to treat, and has high rates of recurrence and mortality. The current therapies include surgery, radiation therapy, and chemotherapy, although these approaches often failed to control tumor progression or improve patient survival. Sonodynamic therapy is a developing cancer treatment that uses ultrasound combined with a sonosensitizer to synergistically kill tumor cells, and has provided impressive results in both in vitro and in vivo studies...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28424403/-non-convulsive-status-epilepticus-caused-by-hyponatremia-in-an-elderly-woman-a-case-report
#6
Yoshinori Kurauchi, Masahiro Yasaka, Keisuke Tokunaga, Masaki Saito, Shun Shimohama, Yasushi Okada
We report the case of a 67-year-old woman with non-convulsive status epilepticus (NCSE) due to hyponatremia. She had a history of psychogenic polydipsia but not epilepsy. She was admitted to our hospital with dysbulia. On admission, she was confused and disoriented (Glasgow Coma Scale: 6, E1V1M4). Magnetic resonance imaging of the brain showed no abnormalities. Laboratory test showed hyponatremia (Na<sup>+</sup> level: 115 mEq/L). The electroencephalography (EEG) showed a generalized slow wave of 5 Hz during recording...
April 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/28420646/associations-between-left-ventricular-dysfunction-and-brain-structure-and-function-findings-from-the-sabre-southall-and-brent-revisited-study
#7
Chloe M Park, Emily D Williams, Nish Chaturvedi, Therese Tillin, Robert J Stewart, Marcus Richards, Dean Shibata, Jamil Mayet, Alun D Hughes
BACKGROUND: Subclinical left ventricular (LV) dysfunction has been inconsistently associated with early cognitive impairment, and mechanistic pathways have been poorly considered. We investigated the cross-sectional relationship between LV dysfunction and structural/functional measures of the brain and explored the role of potential mechanisms. METHOD AND RESULTS: A total of 1338 individuals (69±6 years) from the Southall and Brent Revisited study underwent echocardiography for systolic (tissue Doppler imaging peak systolic wave) and diastolic (left atrial diameter) assessment...
April 18, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28420323/study-protocol-insight-46-a-neuroscience-sub-study-of-the-mrc-national-survey-of-health-and-development
#8
Christopher A Lane, Thomas D Parker, Dave M Cash, Kirsty Macpherson, Elizabeth Donnachie, Heidi Murray-Smith, Anna Barnes, Suzie Barker, Daniel G Beasley, Jose Bras, David Brown, Ninon Burgos, Michelle Byford, M Jorge Cardoso, Ana Carvalho, Jessica Collins, Enrico De Vita, John C Dickson, Norah Epie, Miklos Espak, Susie M D Henley, Chandrashekar Hoskote, Michael Hutel, Jana Klimova, Ian B Malone, Pawel Markiewicz, Andrew Melbourne, Marc Modat, Anette Schrag, Sachit Shah, Nikhil Sharma, Carole H Sudre, David L Thomas, Andrew Wong, Hui Zhang, John Hardy, Henrik Zetterberg, Sebastien Ourselin, Sebastian J Crutch, Diana Kuh, Marcus Richards, Nick C Fox, Jonathan M Schott
BACKGROUND: Increasing age is the biggest risk factor for dementia, of which Alzheimer's disease is the commonest cause. The pathological changes underpinning Alzheimer's disease are thought to develop at least a decade prior to the onset of symptoms. Molecular positron emission tomography and multi-modal magnetic resonance imaging allow key pathological processes underpinning cognitive impairment - including β-amyloid depostion, vascular disease, network breakdown and atrophy - to be assessed repeatedly and non-invasively...
April 18, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28419850/overpressure-blast-injury-induced-oxidative-stress-and-neuroinflammation-response-in-rat-frontal-cortex-and-cerebellum
#9
Hale Z Toklu, Zhihui Yang, Sehkar Oktay, Yasemin Sakarya, Nataliya Kirichenko, Michael K Matheny, Judy Muller-Delp, Kevin Strang, Philip J Scarpace, Kevin K W Wang, Nihal Tümer
BACKGROUND & AIM: Overpressure blast-wave induced brain injury (OBI) and its long-term neurological outcome pose significant concerns for military personnel. Our aim is to investigate the mechanism of injury due to OBI. METHODS: Rats were divided into 3 groups: 1) Control, 2) OBI (exposed 30psi peak pressure, 2-2.5ms), 3) Repeated OBI (r-OBI) (three exposures over one-week period). Lung and brain (cortex and cerebellum) tissues were collected at 24h post injury...
April 15, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28414663/not-another-acs-rule-out
#10
S Preston, R Nelson, M Watts, D Smith, T Dewenter, D Spruill
CASE: A 50 year old African-American woman with diabetes, hypertension, and hyperlipidemia presented with progressively worsening retro-sternal chest pain, exacerbated by activity and relieved by rest. She also endorsed a thirty-pound unintentional weight loss, and dysphagia. She was dysarthric with left-sided Bell's Palsy and a palpable left axillary lymph node. She had been evaluated at several hospitals in the previous months for similar typical chest pain. Her troponin values were normal, and an EKG showed T-wave inversions in leads I and aVL...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28414399/current-understanding-of-the-health-effects-of-electromagnetic-fields
#11
Tayaba Miah, Deepak Kamat
There has been an exponential increase in the use of electronic devices over the past few decades. This has led to increased exposure to electromagnetic fields (EMF). Electric fields result from differences in voltage, whereas magnetic fields result from the flow of electric current. Higher-frequency waves of EMF have more energy than lower-frequency waves, and thus generally tend to be more harmful. An EMF activates cellular stress response and also causes breaks in DNA strands. There are many methodological barriers to effectively measuring the associations of EMF and childhood cancers...
April 1, 2017: Pediatric Annals
https://www.readbyqxmd.com/read/28413741/serial-magnetic-resonance-imaging-in-creutzfeldt-jakob-disease-a-case-report-and-literature-review
#12
Ahmed H Qavi, Tasnim F Imran, Zachariah Hasan, Fariha Ilyas, Usman Ghani, Salman Assad, Shabih Hasan
Creutzfeldt-Jakob disease (CJD) is a rare, degenerative, invariably fatal brain disorder. CJD usually appears in later life and runs a rapid course. Typically, the onset of symptoms occurs about age 60 and about 90% of individuals die within one year. We report a case of 67-year-old male presented with progressive aphasia, confusion, dysphagia and inability to carry out activities of daily life (ADLs) over a period of three to four weeks. The patient had past medical history of chronic atrial fibrillation and hypertension...
March 14, 2017: Curēus
https://www.readbyqxmd.com/read/28412440/transient-networks-of-spatio-temporal-connectivity-map-communication-pathways-in-brain-functional-systems
#13
Alessandra Griffa, Benjamin Ricaud, Kirell Benzi, Xavier Bresson, Alessandro Daducci, Pierre Vandergheynst, Jean-Philippe Thiran, Patric Hagmann
The study of brain dynamics enables us to characterize the time-varying functional connectivity among distinct neural groups. However, current methods suffer from the absence of structural connectivity information. We propose to integrate infra-slow neural oscillations and anatomical-connectivity maps, as derived from functional and diffusion MRI, in a multilayer-graph framework that captures transient networks of spatio-temporal connectivity. These networks group anatomically wired and temporary synchronized brain regions and encode the propagation of functional activity on the structural connectome...
April 12, 2017: NeuroImage
https://www.readbyqxmd.com/read/28411335/development-of-a-puff-and-suction-type-pressure-stimulator-for-human-tactile-studies
#14
Hyung-Sik Kim, Mi-Hyun Choi, Soon-Cheol Chung
In this study, we developed a tactile stimulator capable of administering either puff- or suction-type stimuli. The system is composed of three parts: a control unit, an air-handling unit, and a stimulation unit. The control unit controls the type, intensity, and time of stimulation. The air-handling unit delivers the stimulation power quantitatively to the stimulation unit, as commanded by the control unit. The stimulation unit stably administers either type of pressure to the skin, without any change of the tactor...
April 14, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/28410055/olfactory-recognition-based-on-eeg-gamma-band-activity
#15
Onder Aydemir
There are various kinds of brain monitoring techniques, including local field potential, near-infrared spectroscopy, magnetic resonance imaging (MRI), positron emission tomography, functional MRI, electroencephalography (EEG), and magnetoencephalography. Among those techniques, EEG is the most widely used one due to its portability, low setup cost, and noninvasiveness. Apart from other advantages, EEG signals also help to evaluate the ability of the smelling organ. In such studies, EEG signals, which are recorded during smelling, are analyzed to determine the subject lacks any smelling ability or to measure the response of the brain...
April 14, 2017: Neural Computation
https://www.readbyqxmd.com/read/28404210/characteristics-of-epilepsy-in-patients-with-kabuki-syndrome-with-kmt2d-mutations
#16
Naoko Kurahashi, Noriko Miyake, Seiji Mizuno, Eriko Koshimizu, Hirokazu Kurahashi, Keitaro Yamada, Jun Natsume, Yusuke Aoki, Miho Nakamura, Hiroko Taniai, Yuki Maki, Chihiro Abe-Hatano, Naomichi Matsumoto, Koichi Maruyama
BACKGROUND: The characteristics of epilepsy in patients with Kabuki syndrome with KMT2D mutations (KABUK1) have not yet been well documented. This is the first review to explore this. MATERIALS & METHODS: We enrolled 14 patients with KABUK1, whose median age was 13.6years (range=4.1-21.3years). Their medical records from October 1981 to May 2016 were retrospectively analyzed. RESULTS: Epilepsy was present in 5 (36%) patients. Four of these patients presented with nonsense mutations and one with missense mutations...
April 9, 2017: Brain & Development
https://www.readbyqxmd.com/read/28403239/simulated-blast-overpressure-induces-specific-astrocyte-injury-in-an-ex-vivo-brain-slice-model
#17
Saranya Canchi, Malisa Sarntinoranont, Yu Hong, Jeremy J Flint, Ghatu Subhash, Michael A King
Exposure to explosive blasts can produce functional debilitation in the absence of brain pathology detectable at the scale of current diagnostic imaging. Transient (ms) overpressure components of the primary blast wave are considered to be potentially damaging to the brain. Astrocytes participate in neuronal metabolic maintenance, blood-brain barrier, regulation of homeostatic environment, and tissue remodeling. Damage to astrocytes via direct physical forces has the potential to disrupt local and global functioning of neuronal tissue...
2017: PloS One
https://www.readbyqxmd.com/read/28402972/eeg-a-valuable-biomarker-of-brain-injury-in-preterm-infants
#18
Elena Pavlidis, Rhodri O Lloyd, Geraldine B Boylan
This review focuses on the role of electroencephalography (EEG) in monitoring abnormalities of preterm brain function. EEG features of the most common developmental brain injuries in preterm infants, including intraventricular haemorrhage, periventricular leukomalacia, and perinatal asphyxia, are described. We outline the most common EEG biomarkers associated with these injuries, namely seizures, positive rolandic sharp waves, EEG suppression/increased interburst intervals, mechanical delta brush activity, and other deformed EEG waveforms, asymmetries, and asynchronies...
April 13, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28398490/the-prognostic-benefit-of-cardiac-resynchronization-therapy-is-greater-in-concordant-vs-discordant-left-bundle-branch-block-in-the-multicenter-automatic-defibrillator-implantation-trial-cardiac-resynchronization-therapy-madit-crt
#19
Luigi Padeletti, Alberto Aimo, Bella Vishenvsky, Arielle Schwartz, Scott McNitt, Paul J Wang, Arthur J Moss, Michele Emdin, Wojciech Zareba
Aims: Discordant and concordant left bundle branch block (dLBBB/cLBBB) are characterized by negative or positive T waves, respectively, in lateral leads. We assessed if the two morphologies are associated with different clinical status and prognosis in patients with heart failure (HF) and current indication to Cardiac Resynchronization Therapy (CRT)/CRT-Defibrillator (CRT-D). Methods and results: Baseline electrocardiograms of 1270 patients with LBBB in the Multicenter Automatic Defibrillator Implantation Trial-Cardiac Resynchronization Therapy cohort were analysed to identify dLBBB and cLBBB...
April 7, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28394902/correlation-of-hippocampal-atrophy-with-hyperhomocysteinemia-in-hemodialysis-patients-an-exploratory-pilot-study
#20
Kyoko Maesato, Takayasu Ohtake, Yasuhiro Mochida, Kunihiro Ishioka, Machiko Oka, Hidekazu Moriya, Sumi Hidaka, Shuzo Kobayashi
BACKGROUND: Cognitive impairment is one of the important critical issues in hemodialysis (HD) patients. However, the associating factors of brain atrophy in HD patients have not been fully elucidated. PURPOSE AND METHODS: Brain magnetic resonance imaging (MRI) was performed in 34 of total 72 HD outpatients in our dialysis center. These MRI images were analyzed by an application software; Voxel-based Specific Regional Analysis System for Alzheimer's Disease (VSRAD)...
2017: PloS One
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