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https://www.readbyqxmd.com/read/28226802/unscented-kalman-filter-for-neural-decoding-of-human-treadmill-walking-from-non-invasive-electroencephalography
#1
Trieu Phat Luu, Yongtian He, Sho Nakagame, Jeffrey Gorges, Kevin Nathan, Jose L Contreras-Vidal, Trieu Phat Luu, Yongtian He, Sho Nakagame, Jeffrey Gorges, Kevin Nathan, Jose L Contreras-Vidal, Jose L Contreras-Vidal, Trieu Phat Luu, Jeffrey Gorges, Yongtian He, Sho Nakagame, Kevin Nathan
The feasibility of decoding lower limb kinematics in human treadmill walking from noninvasive electroencephalography (EEG) has been demonstrated with linear Wiener filter. However, nonlinear relationship between neural activities and limb movements may challenge the linear decoders in real-time brain computer interface (BCI) applications. In this study, we propose a nonlinear neural decoder using an Unscented Kalman Filter (UKF) to infer lower limb joint angles from noninvasive scalp EEG signals during human treadmill walking...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226492/toward-an-analysis-of-emotion-regulation-in-children-using-late-positive-potential
#2
Raja Majid Mehmood, Hyo Jong Lee, Raja Majid Mehmood, Hyo Jong Lee, Raja Majid Mehmood, Hyo Jong Lee
The ability of emotion regulation and emotional responses in children is a main component of emotional competence through the development process. We had employed electroencephalography (EEG) a well-known noninvasive method for recording of brain emotion signals in order to analyze the emotion regulations in children. The international affective picture system (IAPS) pictures dataset was used for selection of stimuli presentation. The stimulus presentation was commonly practiced to induce the emotional responses from human brain...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226476/ultrasound-characterization-of-interface-oscillation-as-a-proxy-for-ventriculoperitoneal-shunt-function
#3
April Joy C Aralar, Matthew D Bird, Robert D Graham, Beomseo Koo, Mahesh B Shenai, Parag V Chitnis, Siddhartha Sikdar, April Joy C Aralar, Matthew D Bird, Robert D Graham, Beomseo Koo, Mahesh B Shenai, Parag V Chitnis, Siddhartha Sikdar, Mahesh B Shenai, Beomseo Koo, Robert D Graham, Matthew D Bird, Siddhartha Sikdar, Parag V Chitnis, April Joy C Aralar
Hydrocephalus, where cerebrospinal fluid (CSF) production rate is greater than reabsorption rate, leads to impaired neurological function if left untreated. Ventriculoperitoneal shunts (VPS) are implanted in the brain ventricles to route CSF. VPS systems have a high failure rate, and failure symptoms resemble symptoms of common maladies. The current gold standard for shunt diagnosis, surgical intervention, poses high risk and requires an expensive procedure for patients. Current non-invasive methods lack proper insight to assist physicians...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226450/identifying-epileptic-source-location-and-extent-an-iterative-sparse-electromagnetic-source-imaging-algorithm
#4
Abbas Sohrabpour, Yunfeng Lu, Gregory Worrell, Bin He, Abbas Sohrabpour, Yunfeng Lu, Gregory Worrell, Bin He, Abbas Sohrabpour, Yunfeng Lu, Gregory Worrell, Bin He
In this paper we have introduced a novel electromagnetic source imaging (ESI) technique and demonstrated its validity and excellent performance in imaging the location and extent of underlying epileptic sources in patients suffering from focal epilepsy. The proposed algorithm employs ideas from sparse signal processing literature and convex optimization theories to improve source imaging results obtained from scalp-recorded electroencephalogram (EEG). EEG source imaging results generally use subjective methods to determine the extent of the underlying brain activity...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28219399/noninvasive-detection-of-alarming-intracranial-pressure-changes-by-auditory-monitoring-in-early-management-of-brain-injury-a-prospective-invasive-versus-noninvasive-study
#5
Fabrice Giraudet, François Longeras, Aurélien Mulliez, Aurélie Thalamy, Bruno Pereira, Paul Avan, Laurent Sakka
BACKGROUND: In brain-injured patients intracranial pressure (ICP) is monitored invasively by a ventricular or intraparenchymal transducer. The procedure requires specific expertise and exposes the patient to complications such as malposition, hemorrhage or infection. As inner-ear fluid compartments are connected to the cerebrospinal fluid space, ICP changes elicit subtle changes in the physiology of the inner ear. Notably, we previously demonstrated that the phase of cochlear microphonic potential (CM) generated by sound stimuli rotates with ICP...
February 21, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28218900/in-vivo-three-photon-imaging-of-activity-of-gcamp6-labeled-neurons-deep-in-intact-mouse-brain
#6
Dimitre G Ouzounov, Tianyu Wang, Mengran Wang, Danielle D Feng, Nicholas G Horton, Jean C Cruz-Hernández, Yu-Ting Cheng, Jacob Reimer, Andreas S Tolias, Nozomi Nishimura, Chris Xu
High-resolution optical imaging is critical to understanding brain function. We demonstrate that three-photon microscopy at 1,300-nm excitation enables functional imaging of GCaMP6s-labeled neurons beyond the depth limit of two-photon microscopy. We record spontaneous activity from up to 150 neurons in the hippocampal stratum pyramidale at ∼1-mm depth within an intact mouse brain. Our method creates opportunities for noninvasive recording of neuronal activity with high spatial and temporal resolution deep within scattering brain tissues...
February 20, 2017: Nature Methods
https://www.readbyqxmd.com/read/28207604/memory-rehabilitation-strategies-in-nonsurgical-temporal-lobe-epilepsy-a-review
#7
Alessandra Del Felice, Marzia Alderighi, Matteo Martinato, Davide Grisafi, Anna Bosco, Pamela J Thompson, Josemir W Sander, Stefano Masiero
People with temporal lobe epilepsy (TLE) who have not undergone epilepsy surgery often complain of memory deficits. Cognitive rehabilitation is employed as a remedial intervention in clinical settings, but research is limited and findings concerning efficacy and the criteria for choosing different approaches have been inconsistent. We aimed to appraise existing evidence on memory rehabilitation in nonsurgical individuals with temporal lobe epilepsy and to ascertain the effectiveness of specific strategies. A scoping review was preferred given the heterogeneous nature of the interventions...
February 15, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28203104/proton-magnetic-resonance-spectroscopy-assessment-of-metabolite-status-of-the-anterior-cingulate-cortex-in-chronic-pain-patients-and-healthy-controls
#8
Takahiro Ito, Sachiko Tanaka-Mizuno, Narihito Iwashita, Ikuo Tooyama, Akihiko Shiino, Katsuyuki Miura, Sei Fukui
BACKGROUND: Chronic pain is a common cause of reduced quality of life. Recent studies suggest that chronic pain patients have a different brain neurometabolic status to healthy people. Proton magnetic resonance spectroscopy ((1)H-MRS) can determine the concentrations of metabolites in a specific region of the brain without being invasive. PATIENTS AND METHODS: We recruited 56 chronic pain patients and 60 healthy controls to compare brain metabolic characteristics...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28199219/clinical-applications-of-near-infrared-diffuse-correlation-spectroscopy-and-tomography-for-tissue-blood-flow-monitoring-and-imaging
#9
Yu Shang, Ting Li, Guoqiang Yu
Near-infrared (NIR) light enables the deep tissue investigation of microvascular hemodynamics. Blood flow is one such available observable promoting a wealth of physiological insight both individually and in combination with other metrics. Diffuse correlation spectroscopy (DCS) and, to a lesser extent, diffuse correlation tomography (DCT), have received interest over the past two decades as noninvasive methods for tissue blood flow measurement and imaging. DCS employs coherent point-illumination NIR light to penetrate deep tissues and commonly uses avalanche photodiodes to detect temporal speckle fluctuations of the diffuse light in a single speckle area of tissue surface, which are sensitive to the motions of red blood cells in the microvasculature of the detected tissue volume...
February 15, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28195439/noninvasive-imaging-of-brain-oxygen-metabolism-in-children-with-primary-nocturnal-enuresis-during-natural-sleep
#10
Bing Yu, Mingzhu Huang, Xu Zhang, Hongwei Ma, Miao Peng, Qiyong Guo
A series of studies have revealed that nocturnal enuresis is closely related to hypoxia in children with primary nocturnal enuresis (PNE). However, brain oxygen metabolism of PNE children has not been investigated before. The purpose of this study was to investigate changes in whole-brain cerebral metabolic rate of oxygen (CMRO2 ), cerebral blood flow (CBF), and oxygen extraction fraction (OEF) in children suffering from PNE. We used the newly developed T2-relaxation-under-spin-tagging (TRUST) magnetic resonance imaging technique...
February 14, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28195139/altered-insula-connectivity-under-mdma
#11
Ishan C Walpola, Timothy Nest, Leor Roseman, David Erritzoe, Amanda Feilding, David J Nutt, Robin L Carhart-Harris
Recent work with noninvasive human brain imaging has started to investigate the effects of 3, 4-methylenedioxymethamphetamine (MDMA) on large-scale patterns of brain activity. MDMA, a potent monoamine-releaser with particularly pronounced serotonin- releasing properties, has unique subjective effects that include: marked positive mood, pleasant/unusual bodily sensations and pro-social, empathic feelings. However, the neurobiological basis for these effects is not properly understood, and the present analysis sought to address this knowledge gap...
February 14, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28194925/slip-interface-imaging-based-on-mr-elastography-preoperatively-predicts-meningioma-brain-adhesion
#12
Ziying Yin, Joshua D Hughes, Kevin J Glaser, Armando Manduca, Jamie Van Gompel, Michael J Link, Anthony Romano, Richard L Ehman, John Huston
PURPOSE: To investigate the ability of slip interface imaging (SII), a recently developed magnetic resonance elastography (MRE)-based technique, to predict the degree of meningioma-brain adhesion, using findings at surgery as the reference standard. MATERIALS AND METHODS: With Institutional Review Board approval and written informed consent, 25 patients with meningiomas >2.5 cm in maximal diameter underwent preoperative SII assessment. Intracranial shear motions were introduced using a soft, pillow-like head driver and the resulting displacement field was acquired with an MRE pulse sequence on 3T MR scanners...
February 14, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28194442/redirecting-n-acetylaspartate-metabolism-in-the-central-nervous-system-normalizes-myelination-and-rescues-canavan-disease
#13
Dominic J Gessler, Danning Li, Hongxia Xu, Qin Su, Julio Sanmiguel, Serafettin Tuncer, Constance Moore, Jean King, Reuben Matalon, Guangping Gao
Canavan disease (CD) is a debilitating and lethal leukodystrophy caused by mutations in the aspartoacylase (ASPA) gene and the resulting defect in N-acetylaspartate (NAA) metabolism in the CNS and peripheral tissues. Recombinant adeno-associated virus (rAAV) has the ability to cross the blood-brain barrier and widely transduce the CNS. We developed a rAAV-based and optimized gene replacement therapy, which achieves early, complete, and sustained rescue of the lethal disease phenotype in CD mice. Our treatment results in a super-mouse phenotype, increasing motor performance of treated CD mice beyond that of WT control mice...
February 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28188846/sexual-differentiation-of-the-adolescent-rat-brain-a-longitudinal-voxel-based-morphometry-study
#14
Akira Sumiyoshi, Hiroi Nonaka, Ryuta Kawashima
The sexual differentiation of the rat brain during the adolescent period has been well documented in post-mortem histological studies. However, to further understand the morphological changes occurring in the entire brain, a noninvasive neuroimaging method allowing an unbiased, comprehensive, and longitudinal investigation of brain morphology should be used. In this study, we investigated the sexual differentiation of the rat brain during the adolescent period using longitudinal voxel-based morphometry (VBM) analysis...
February 7, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28185873/neurofeedback-as-supplementary-training-for-optimizing-athletes-performance-a-systematic-review-with-implications-for-future-research
#15
REVIEW
Arash Mirifar, Jürgen Beckmann, Felix Ehrlenspiel
Self-regulation plays an important role in enhancing human performance. Neurofeedback is a promising noninvasive approach for modifying human brain oscillation and can be utilized in developing skills for self-regulation of brain activity. So far, the effectiveness of neurofeedback has been evaluated with regard to not only its application in clinical populations but also the enhancement of performance in general. However, reviews of the application of neurofeedback training in the sports domain are absent, although this application goes back to 1991, when it was first applied in archery...
February 6, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28184152/drug-delivery-in-overcoming-the-blood-brain-barrier-role-of-nasal-mucosal-grafting
#16
REVIEW
Carlotta Marianecci, Federica Rinaldi, Patrizia Nadia Hanieh, Luisa Di Marzio, Donatella Paolino, Maria Carafa
The blood-brain barrier (BBB) plays a fundamental role in protecting and maintaining the homeostasis of the brain. For this reason, drug delivery to the brain is much more difficult than that to other compartments of the body. In order to bypass or cross the BBB, many strategies have been developed: invasive techniques, such as temporary disruption of the BBB or direct intraventricular and intracerebral administration of the drug, as well as noninvasive techniques. Preliminary results, reported in the large number of studies on the potential strategies for brain delivery, are encouraging, but it is far too early to draw any conclusion about the actual use of these therapeutic approaches...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28183839/mr-imaging-of-individual-perfusion-reorganization-using-superselective-pseudocontinuous-arterial-spin-labeling-in-patients-with-complex-extracranial-steno-occlusive-disease
#17
V Richter, M Helle, M J P van Osch, T Lindner, A S Gersing, P Tsantilas, H-H Eckstein, C Preibisch, C Zimmer
BACKGROUND AND PURPOSE: Patients with multiple stenoses or occlusions of the extracranial arteries require an individualized diagnostic approach. We evaluated the feasibility and clinical utility of a novel MR imaging technique for regional perfusion imaging in this patient group. MATERIALS AND METHODS: Superselective pseudocontinuous arterial spin-labeling with a circular labeling spot enabling selective vessel labeling was added to routine imaging in a prospective pilot study in 50 patients (10 women, 70...
February 9, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28178896/sequential-pet-estimation-of-cerebral-oxygen-metabolism-with-spontaneous-respiration-of-15-o-gas-in-mice-with-bilateral-common-carotid-artery-stenosis
#18
Takashi Temma, Makoto Yamazaki, Jun Miyanohara, Hisashi Shirakawa, Naoya Kondo, Kazuhiro Koshino, Shuji Kaneko, Hidehiro Iida
Positron emission tomography with (15)O-labeled gases ((15)O-PET) is important for in vivo measurement of cerebral oxygen metabolism both in clinical and basic settings. However, there are currently no reports concerning (15)O-PET in mice. Here, we developed an (15)O-PET method applicable to mice with spontaneous respiration of (15)O-gas without a tracheotomy catheter. Sequential (15)O-PET was also performed in a mouse model of chronic cerebral hypoperfusion with bilateral common carotid artery stenosis (BCAS) induced by placement of microcoils...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28178891/up-regulation-of-cerebral-cytochrome-c-oxidase-and-hemodynamics-by-transcranial-infrared-laser-stimulation-a-broadband-near-infrared-spectroscopy-study
#19
Xinlong Wang, Fenghua Tian, Divya D Reddy, Sahil S Nalawade, Douglas W Barrett, Francisco Gonzalez-Lima, Hanli Liu
Transcranial infrared laser stimulation (TILS) is a noninvasive form of brain photobiomulation. Cytochrome-c-oxidase (CCO), the terminal enzyme in the mitochondrial electron transport chain, is hypothesized to be the primary intracellular photoacceptor. We hypothesized that TILS up-regulates cerebral CCO and causes hemodynamic changes. We delivered 1064-nm laser stimulation to the forehead of healthy participants ( n = 11), while broadband near-infrared spectroscopy was utilized to acquire light reflectance from the TILS-treated cortical region before, during, and after TILS...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28178140/utility-of-duranta-a-wireless-patch-type-electrocardiographic-monitoring-system-developed-in-japan-in-detecting-covert-atrial-fibrillation-in-patients-with-cryptogenic-stroke-a-case-report
#20
Hisanao Akiyama, Saki Nukui, Takashi Araga, Masashi Hoshino, Keita Tanaka, Satoru Kashima, Rie Sasaki, Kenji Uchino, Yasuhiro Hasegawa
RATIONALE: Subcutaneous implantable electrocardiographs are highly effective in detecting covert atrial fibrillation (AF) in cryptogenic stroke. However, these invasive devices are not indicated for all cryptogenic stroke patients, and noninvasive improvements over conventional Holter-type ambulatory electrocardiography are needed. We evaluated the clinical application and effectiveness of Duranta (ImageONE Co., Ltd.), a wireless patch-type electrocardiographic monitoring system developed in Japan for chronically ill patients or home-based patients at the end of life...
February 2017: Medicine (Baltimore)
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