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https://www.readbyqxmd.com/read/28727580/increase-in-intracranial-pressure-by-application-of-a-rigid-cervical-collar-a-pilot-study-in-healthy-volunteers
#1
Iscander M Maissan, Rein Ketelaars, Boris Vlottes, Sanne E Hoeks, Dennis den Hartog, Robert J Stolker
OBJECTIVES: Rigid cervical collars are known to increase intracranial pressure (ICP) in severe traumatic brain injury (TBI). Cerebral blood flow might decrease according to the Kellie Monroe doctrine. For this reason, the use of the collar in patients with severe TBI has been abandoned from several trauma protocols in the Netherlands. There is no evidence on the effect of a rigid collar on ICP in patients with mild or moderate TBI or indeed patients with no TBI. As a first step we tested the effect in healthy volunteers with normal ICPs and intact autoregulation of the brain...
July 19, 2017: European Journal of Emergency Medicine: Official Journal of the European Society for Emergency Medicine
https://www.readbyqxmd.com/read/28723281/imaging-correlates-of-adult-glioma-genotypes
#2
Marion Smits, Martin J van den Bent
Primary brain tumors, most commonly gliomas, are histopathologically typed and graded as World Health Organization (WHO) grades I-IV according to increasing degrees of malignancy. These grades provide prognostic information and guidance on treatment such as radiation therapy and chemotherapy after surgery. Despite the confirmed value of the WHO grading system, results of a multitude of studies and prospective interventional trials now indicate that tumors with identical morphologic criteria can have highly different outcomes...
August 2017: Radiology
https://www.readbyqxmd.com/read/28718779/a-review-and-experimental-study-on-application-of-classifiers-and-evolutionary-algorithms-in-eeg-based-brain-machine-interface-systems
#3
Farajollah Tahernezhad-Javazm, Vahid Azimirad, Maryam Shoaran
OBJECTIVE: Considering the importance and the near future development of noninvasive Brain-Machine Interface (BMI) systems, this paper presents a comprehensive theoretical-experimental survey on the classification and evolutionary methods for BMI-based systems in which EEG signals are used. APPROACH: The paper is divided into two main parts. In the first part a wide range of different types of the base and combinatorial classifiers including boosting and bagging classifiers and also evolutionary algorithms are reviewed and investigated...
July 18, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28716717/big-gaba-edited-mr-spectroscopy-at-24-research-sites
#4
Mark Mikkelsen, Peter B Barker, Pallab K Bhattacharyya, Maiken K Brix, Pieter F Buur, Kim M Cecil, Kimberly L Chan, David Y-T Chen, Alexander R Craven, Koen Cuypers, Michael Dacko, Niall W Duncan, Ulrike Dydak, David A Edmondson, Gabriele Ende, Lars Ersland, Fei Gao, Ian Greenhouse, Ashley D Harris, Naying He, Stefanie Heba, Nigel Hoggard, Tun-Wei Hsu, Jacobus F A Jansen, Alayar Kangarlu, Thomas Lange, R Marc Lebel, Yan Li, Chien-Yuan E Lin, Jy-Kang Liou, Jiing-Feng Lirng, Feng Liu, Ruoyun Ma, Celine Maes, Marta Moreno-Ortega, Scott O Murray, Sean Noah, Ralph Noeske, Michael D Noseworthy, Georg Oeltzschner, James J Prisciandaro, Nicolaas A J Puts, Timothy P L Roberts, Markus Sack, Napapon Sailasuta, Muhammad G Saleh, Michael-Paul Schallmo, Nicholas Simard, Stephan P Swinnen, Martin Tegenthoff, Peter Truong, Guangbin Wang, Iain D Wilkinson, Hans-Jörg Wittsack, Hongmin Xu, Fuhua Yan, Chencheng Zhang, Vadim Zipunnikov, Helge J Zöllner, Richard A E Edden
Magnetic resonance spectroscopy (MRS) is the only biomedical imaging method that can noninvasively detect endogenous signals from the neurotransmitter γ-aminobutyric acid (GABA) in the human brain. Its increasing popularity has been aided by improvements in scanner hardware and acquisition methodology, as well as by broader access to pulse sequences that can selectively detect GABA, in particular J-difference spectral editing sequences. Nevertheless, implementations of GABA-edited MRS remain diverse across research sites, making comparisons between studies challenging...
July 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/28715314/optimizing-electric-field-delivery-for-tdcs-virtual-humans-help-to-design-efficient-noninvasive-brain-and-spinal-cord-electrical-stimulation
#5
Pedro C Miranda, Ricardo Salvador, Cornelia Wenger, Sofia R Fernandes
Noninvasive electrical stimulation of the central nervous system is attracting increasing interest from the clinical and academic communities as well as from high-tech companies. This interest was sparked by two landmark studies conducted in 2000 and 2001 at the University of G?ttingen, Germany. Michael Nitsche and Walter Paulus showed that by passing a weak, almost imperceptible electric current between two electrodes on the scalp, they could alter the way the human brain responds to stimuli and that the effect persisted for some time after the current was stopped...
July 2017: IEEE Pulse
https://www.readbyqxmd.com/read/28714589/meg-biomarker-of-alzheimer-s-disease-absence-of-a-prefrontal-generator-during-auditory-sensory-gating
#6
Sanja Josef Golubic, Cheryl J Aine, Julia M Stephen, John C Adair, Janice E Knoefel, Selma Supek
Magnetoencephalography (MEG), a direct measure of neuronal activity, is an underexplored tool in the search for biomarkers of Alzheimer's disease (AD). In this study, we used MEG source estimates of auditory gating generators, nonlinear correlations with neuropsychological results, and multivariate analyses to examine the sensitivity and specificity of gating topology modulation to detect AD. Our results demonstrated the use of MEG localization of a medial prefrontal (mPFC) gating generator as a discrete (binary) detector of AD at the individual level and resulted in recategorizing the participant categories in (1) controls with mPFC generator localized in response to both the standard and deviant tones; (2) a possible preclinical stage of AD participants (a lower functioning group of controls) in which mPFC activation was localized to the deviant tone only; and (3) symptomatic AD in which mPFC activation was not localized to either the deviant or standard tones...
July 17, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28714074/altered-metabolomic-genomic-signature-a-potential-noninvasive-biomarker-of-epilepsy
#7
Helen C Wu, Fabien Dachet, Farhad Ghoddoussi, Shruti Bagla, Darren Fuerst, Jeffrey A Stanley, Matthew P Galloway, Jeffrey A Loeb
OBJECTIVE: This study aimed to identify noninvasive biomarkers of human epilepsy that can reliably detect and localize epileptic brain regions. Having noninvasive biomarkers would greatly enhance patient diagnosis, patient monitoring, and novel therapy development. At the present time, only surgically invasive, direct brain recordings are capable of detecting these regions with precision, which severely limits the pace and scope of both clinical management and research progress in epilepsy...
July 17, 2017: Epilepsia
https://www.readbyqxmd.com/read/28713248/deep-brain-magnetic-stimulation-promotes-neurogenesis-and-restores-cholinergic-activity-in-a-transgenic-mouse-model-of-alzheimer-s-disease
#8
Junli Zhen, Yanjing Qian, Jian Fu, Ruijun Su, Haiting An, Wei Wang, Yan Zheng, Xiaomin Wang
Alzheimer's disease (AD) is characterized by progressive decline of memory and cognitive functions. Deep magnetic stimulation (DMS), a noninvasive and nonpharmacological brain stimulation, has been reported to alleviate stress-related cognitive impairment in neuropsychiatric disorders. Our previous study also discovered the preventive effect of DMS on cognitive decline in an AD mouse model. However, the underlying mechanism must be explored further. In this study, we investigated the effect of DMS on spatial learning and memory functions, neurogenesis in the dentate gyrus (DG), as well as expression and activity of the cholinergic system in a transgenic mouse model of AD (5XFAD)...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28712206/spectrum-of-brain-abnormalities-detected-on-whole-body-f-18-fdg-pet-ct-scan
#9
Aamna Hassan, Yasir Majeed, Khurram Aftab
Positron emission tomography (PET) with integrated computed tomography (CT) is a unique modality to noninvasively scan the whole body for diagnosing, staging and assessing response to therapy in various benign and malignant diseases. 18F fluorodeoxyglucose (FDG) is the most commonly used radiotracer for PET/CT imaging in cancer patients. FDG is a glucose analogue which is the predominant substrate for brain metabolism. As the brain cells are obligate glucose consumers, the knowledge of physiologic radiotracer uptake within the brain is imperative for correct interpretation of abnormal sites of metabolism...
January 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28710751/ultrasound-imaging-of-dna-damage-effects-in-live-cultured-cells-and-in-brain-tissue
#10
Hadi Tadayyon, Mehrdad J Gangeh, Roxana Vlad, Michael C Kolios, Gregory J Czarnota
High-frequency ultrasound (>20 MHz) spectroscopy can be used to detect noninvasively DNA damage in cell samples in vitro, and in live tissue both ex vivo and in vivo. This chapter focuses on the former two aspects. Experimental evidence suggests that morphological changes that occur in cells undergoing apoptosis result in changes in frequency-dependent ultrasound backscatter. With advances in research, ultrasound spectroscopy is advancing the boundaries of fast, label-free, noninvasive DNA damage detection technology with potential use in personalized medicine and early therapy response monitoring...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28709330/backward-renormalization-group-inference-of-cortical-dipole-sources-and-neural-connectivity-efficacy
#11
Selene da Rocha Amaral, Luiz A Baccalá, Leonardo S Barbosa, Nestor Caticha
Proper neural connectivity inference has become essential for understanding cognitive processes associated with human brain function. Its efficacy is often hampered by the curse of dimensionality. In the electroencephalogram case, which is a noninvasive electrophysiological monitoring technique to record electrical activity of the brain, a possible way around this is to replace multichannel electrode information with dipole reconstructed data. We use a method based on maximum entropy and the renormalization group to infer the position of the sources, whose success hinges on transmitting information from low- to high-resolution representations of the cortex...
June 2017: Physical Review. E
https://www.readbyqxmd.com/read/28708768/transcranial-cerebral-oxymetric-monitoring-reduces-brain-hypoxia-in-obese-and-elderly-patients-undergoing-general-anesthesia-for-laparoscopic-cholecystectomy
#12
Tomislav Ružman, Boris Mraović, Tatjana Šimurina, Danijela Gulam, Nataša Ružman, Maja Miškulin
The aims of this prospective, observational study were to evaluate the changes of the regional cerebral saturation (rSO2) measured by near-infrared spectroscopy during elective laparoscopic cholecystectomy under total intravenous anesthesia and the association between patient's characteristics and critical decline of rSO2. Hemodynamics, rSO2, and oxygen saturation were recorded in different time points: before the anesthesia (Tbas), 2 minutes after the induction (supine position) (Tind), 2 minutes after CO2 insufflation (supine) (TCO2), 10 minutes after CO2 insufflation (reverse Trendelenburg) (TrevT), and 2 minutes after deflation (supine) (Tpost)...
July 13, 2017: Surgical Laparoscopy, Endoscopy & Percutaneous Techniques
https://www.readbyqxmd.com/read/28701915/web-camera-based-eye-tracking-to-assess-visual-memory-on-a-visual-paired-comparison-task
#13
Nicholas T Bott, Alex Lange, Dorene Rentz, Elizabeth Buffalo, Paul Clopton, Stuart Zola
Background: Web cameras are increasingly part of the standard hardware of most smart devices. Eye movements can often provide a noninvasive "window on the brain," and the recording of eye movements using web cameras is a burgeoning area of research. Objective: This study investigated a novel methodology for administering a visual paired comparison (VPC) decisional task using a web camera.To further assess this method, we examined the correlation between a standard eye-tracking camera automated scoring procedure [obtaining images at 60 frames per second (FPS)] and a manually scored procedure using a built-in laptop web camera (obtaining images at 3 FPS)...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28698943/noninvasive-electrical-conductivity-measurement-by-mri-a-test-of-its-validity-and-the-electrical-conductivity-characteristics-of-glioma
#14
Khin Khin Tha, Ulrich Katscher, Shigeru Yamaguchi, Christian Stehning, Shunsuke Terasaka, Noriyuki Fujima, Kohsuke Kudo, Ken Kazumata, Toru Yamamoto, Marc Van Cauteren, Hiroki Shirato
OBJECTIVES: This study noninvasively examined the electrical conductivity (σ) characteristics of diffuse gliomas using MRI and tested its validity. METHODS: MRI including a 3D steady-state free precession (3D SSFP) sequence was performed on 30 glioma patients. The σ maps were reconstructed from the phase images of the 3D SSFP sequence. The σ histogram metrics were extracted and compared among the contrast-enhanced (CET) and noncontrast-enhanced tumour components (NCET) and normal brain parenchyma (NP)...
July 11, 2017: European Radiology
https://www.readbyqxmd.com/read/28692175/neurosonology-accuracy-for-isolated-acute-vestibular-syndromes
#15
Miguel Tábuas-Pereira, João Sargento-Freitas, Luís Isidoro, Fernando Silva, Orlando Galego, César Nunes, Gustavo Cordeiro, Luís Cunha
OBJECTIVES: The clinical approach to acute vestibular syndromes is often complex for the physician. Neurosonology offers a noninvasive method to study the cervicocephalic circulation when a vascular etiology is suspected. We aim to evaluate the diagnostic accuracy of a vascular neurosonological exam in isolated acute vestibular syndrome. METHODS: All patients submitted to cerebrovascular ultrasound and magnetic resonance imaging during the period between 2011 and 2015 with acute isolated vestibular syndrome...
July 10, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28690161/ultrasound-targeted-cns-gene-delivery-for-parkinson-s-disease-treatment
#16
REVIEW
Ching-Hsiang Fan, Chung-Yin Lin, Hao-Li Liu, Chih-Kuang Yeh
Parkinson's disease (PD) is a potent neurodegenerative disease in which a progressive loss of dopaminergic neurons eventually produces a loss of movement control and other symptoms. To date, in addition to pharmacological, non-pharmacological, and neurosurgical therapies, gene delivery has emerged as a potential therapeutic modality for PD. Effective targeted gene delivery is complicated in that gene vectors cannot penetrate the blood-brain barrier (BBB), thus clinical tests must rely on invasive intracerebral gene vector injection...
July 8, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28682030/-hemodialysis-and-cardiovascular-outcome
#17
Laura Panicali, Fabiana Brigante, Elena Mancini
Hemodialysis patients often present multiple comorbidities and have a high mortality rate (15-20% per year), mostly due to cardiovascular events. Besides predisposing pathological conditions related to uremia (heart failure, coronary heart disease, left ventricular hypertrophy, arrhythmias), they also have specific risk factors linked to the hemodialysis (HD) treatment in itself: chronic inflammation, fluid overload, autonomic nervous system dysfunction, arterovenous fistula. These factors may affect the hemodynamic compensatory systems (vascular refilling, arteriolar and venous tone, autonomic nervous system response) to fluid removal, with high risk of intra-dialysis hypotension (IDH) episodes or arrhythmic events...
March 2017: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/28675561/introduction-to-the-2nd-meeting-on-immunity-and-inflammation-in-epilepsy-iie2016
#18
Annamaria Vezzani, Stephan Rüegg
We report about the main topics presented during this meeting which was devoted to discuss the new emerging evidence for a role of immune- and inflammation-related mechanisms in various autoimmune and nonautoimmune forms of epilepsy. Major emphasis was given to novel immune/inflammatory mechanisms contributing to seizures and neurological comorbidities as well as to the discovery and validation of noninvasive biomarkers of brain inflammation which may be used to monitor epileptogenesis and predict the therapeutic effects of treatments...
July 2017: Epilepsia
https://www.readbyqxmd.com/read/28673806/improved-snr-for-combined-tms-fmri-a-support-device-for-commercially-available-body-array-coil
#19
Wen-Tung Wang, Benjamin Xu, John A Butman
BACKGROUND: Transcranial magnetic stimulation (TMS) is a noninvasive brain stimulation tool extensively used in clinical and cognitive neuroscience research. TMS has been applied during functional magnetic resonance imaging (i.e., concurrent/interleaved TMS-fMRI) to understand neural mechanisms underlying cognitive functions. However, no advanced commercial multi-channel whole-brain array MR coils can fit the large TMS coil. We developed a low-cost and easy-to-configure setup that takes advantage of the superior signal-to-noise ratio (SNR) performance of commercially available flexible body array coils that can accommodate the TMS coil...
June 30, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28664265/-networks-involved-in-motor-cognition-physiology-and-pathophysiology-of-apraxia
#20
REVIEW
M Martin, J Hermsdörfer, S Bohlhalter, P H Weiss
Apraxia is an umbrella term for different disorders of higher motor abilities that are not explained by elementary sensorimotor deficits (e. g. paresis or ataxia). Characteristic features of apraxia that are easy to recognize in clinical practice are difficulties in pantomimed or actual use of tools as well as in imitation of meaningless gestures. Apraxia is bilateral, explaining the cognitive motor disorders and occurs frequently (but not exclusively) after left hemispheric lesions, as well as in neurodegenerative diseases, such as corticobasal syndrome and Alzheimer's disease...
June 29, 2017: Der Nervenarzt
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