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https://www.readbyqxmd.com/read/28551109/early-visual-analysis-tool-using-magnetoencephalography-for-treatment-and-recovery-of-neuronal-dysfunction
#1
Waqas Rasheed, Yee Yik Neoh, Nor Hisham Bin Hamid, Faruque Reza, Zamzuri Idris, Tong Boon Tang
Functional neuroimaging modalities play an important role in deciding the diagnosis and course of treatment of neuronal dysfunction and degeneration. This article presents an analytical tool with visualization by exploiting the strengths of the MEG (magnetoencephalographic) neuroimaging technique. The tool automates MEG data import (in tSSS format), channel information extraction, time/frequency decomposition, and circular graph visualization (connectogram) for simple result inspection. For advanced users, the tool also provides magnitude squared coherence (MSC) values allowing personalized threshold levels, and the computation of default model from MEG data of control population...
May 11, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28549797/cortico-amygdalar-maturational-coupling-is-associated-with-depressive-symptom-trajectories-during-adolescence
#2
Nandita Vijayakumar, Nicholas B Allen, Meg Dennison, Michelle L Byrne, Julian G Simmons, Sarah Whittle
BACKGROUND: Adolescence is characterized by increasing prevalence of depressive symptomatology, along with significant structural brain development. While much research has examined focal abnormalities in gray matter structure underlying depression, we employed a structural coupling approach to examine whether longitudinal associations between amygdala and cortical development (referred to as maturational coupling) was related to concurrent changes in depressive symptomatology during adolescence...
May 23, 2017: NeuroImage
https://www.readbyqxmd.com/read/28545574/initiating-change-locally-in-bullying-and-aggression-through-the-school-environment-inclusive-trial-update-to-cluster-randomised-controlled-trial-protocol
#3
Chris Bonell, Anne Mathiot, Elizabeth Allen, Leonardo Bevilacqua, Deborah Christie, Diana Elbourne, Adam Fletcher, Richard Grieve, Rosa Legood, Stephen Scott, Emily Warren, Meg Wiggins, Russell M Viner
BACKGROUND: Systematic reviews suggest that multi-component interventions are effective in reducing bullying victimisation and perpetration. We are undertaking a phase III randomised trial of the INCLUSIVE multi-component intervention. This trial aims to assess the effectiveness and cost-effectiveness of the INCLUSIVE intervention in reducing aggression and bullying victimisation in English secondary schools. This paper updates the original trial protocol published in 2014 (Trials 15:381, 2014) and presents the changes in the process evaluation protocol and the secondary outcome data collection...
May 25, 2017: Trials
https://www.readbyqxmd.com/read/28542644/pre-target-neural-oscillations-predict-variability-in-the-detection-of-small-pitch-changes
#4
Esther Florin, Dominique Vuvan, Isabelle Peretz, Sylvain Baillet
Pitch discrimination is important for language or music processing. Previous studies indicate that auditory perception depends on pre-target neural activity. However, so far the pre-target electrophysiological conditions which enable the detection of small pitch changes are not well studied, but might yield important insights into pitch-processing. We used magnetoencephalography (MEG) source imaging to reveal the pre-target effects of successful auditory detection of small pitch deviations from a sequence of standard tones...
2017: PloS One
https://www.readbyqxmd.com/read/28541190/benchmarking-for-on-scalp-meg-sensors
#5
Minshu Xie, Justin F Schneiderman, Maxim L Chukharkin, Alexei Kalabukhov, Bushra Riaz, Daniel Lundqvist, Stephen Whitmarsh, Matti Hamalainen, Veikko Jousmaki, Robert Oostenveld, Dag Winkler
OBJECTIVE: We present a benchmarking protocol for quantitatively comparing emerging on-scalp magnetoencephalography (MEG) sensor technologies to their counterparts in state-of-the-art MEG systems. METHODS: As a means of validation, we compare a high-critical-temperature superconducting quantum interference device (high Tc SQUID) with the low- Tc SQUIDs of an Elekta Neuromag TRIUX system in MEG recordings of auditory and somatosensory evoked fields (SEFs) on one human subject...
June 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28539421/sound-making-actions-lead-to-immediate-plastic-changes-of-neuromagnetic-evoked-responses-and-induced-beta-band-oscillations-during-perception
#6
Bernhard Ross, Masihullah Barat, Takako Fujioka
Auditory and sensorimotor brain areas interact during the action-perception cycle of sound making. Neurophysiological evidence of a feedforward model of the action and its outcome has been associated with attenuation of the N1 wave of auditory evoked responses elicited by self-generated sounds, such as vocalization or playing a musical instrument. Moreover, neural oscillations at beta-band frequencies have been related to predicting the sound outcome after action initiation. We hypothesized that a newly learned action-perception association would immediately modify interpretation of the sound during subsequent listening...
May 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28537981/development-of-education-and-research-in-anesthesia-and-intensive-care-medicine-at-the-university-teaching-hospital-in-lusaka-zambia-a-descriptive-observational-study
#7
Anna Janowicz, Tuma Kasole, Emily Measures, Meg Langley, Fastone M Goma, Feruza Ismailova, John A Kinnear, M Dylan Bould
BACKGROUND: Data from 2006 show that the practice of anesthesia at the University Teaching Hospital in Lusaka, Zambia was underdeveloped by international standards. Not only was there inadequate provision of resources related to environment, equipment, and drugs, but also a severe shortage of staff, with no local capability to train future physician anesthetic providers. There was also no research base on which to develop the specialty. This study aimed to evaluate patient care, education and research to determine whether conditions had changed a decade later...
May 19, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28530474/optimising-pre-season-training-loads-in-australian-football
#8
David L Carey, Justin Crow, Kok-Leong Ong, Peter Blanch, Meg E Morris, Ben J Dascombe, Kay M Crossley
PURPOSE: To investigate whether pre-season training plans for Australian football can be computer generated using current training load guidelines to optimise injury risk reduction and performance improvement. METHODS: A constrained optimisation problem was defined for daily total and sprint distance, using the pre-season schedule of an elite Australian football team as a template. Maximising total training volume and maximising Banister model projected performance were both considered as optimisation objectives...
May 22, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28529407/increasing-students-familiarity-with-cocurricular-experiences-a-pilot-trial
#9
Emily A Waterman, Meg L Small, Siri Newman, Samantha P Steich
No abstract text is available yet for this article.
October 2016: Journal of College Student Development
https://www.readbyqxmd.com/read/28529059/a-review-of-human-neuroimaging-investigations-involved-with-central-autonomic-regulation-of-baroreflex-mediated-cardiovascular-control
#10
Derek S Kimmerly
Effective regulation of central blood volume and arterial pressure is critical for optimal cardiovascular homeostasis. Inadequate regulation of mean arterial pressure has important pathophysiological implications including syncope, end organ damage, and stroke. Such regulation requires appropriate central integration of barosensory afferents and reflex autonomic control of the heart and blood vessels. The neural pathways involved with the baroreflex include brainstem nuclei that receive modulatory input from higher brain centres...
May 15, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28527986/the-temporal-and-spatial-brain-dynamics-of-automatic-emotion-regulation-in-children
#11
Charline Urbain, Julie Sato, Elizabeth W Pang, Margot J Taylor
Mechanisms for automatic emotion regulation (AER) are essential during childhood as they offset the impact of unwanted or negative emotional responses without drawing on limited attentional resources. Despite the importance of AER in improving the efficiency and flexibility of self-regulation, few research studies have investigated the underlying neurophysiological mechanisms. To fill this gap, we used magnetoencephalography (MEG) to investigate AER-related brain processes in 25 children (∼10 years old) who performed a go/no-go task that included an incidental exposure to faces containing socio-emotional cues...
May 17, 2017: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/28526621/electrophysiological-signatures-of-phonological-and-semantic-maintenance-in-sentence-repetition
#12
Jed A Meltzer, Aneta Kielar, Lilia Panamsky, Kira A Links, Tiffany Deschamps, Rosie C Leigh
Verbal short-term memory comprises resources for phonological rehearsal, which have been characterized anatomically, and for maintenance of semantic information, which are less understood. Sentence repetition tasks tap both processes interactively. To distinguish brain activity involved in phonological vs. semantic maintenance, we recorded magnetoencephalography during a sentence repetition task, incorporating three manipulations emphasizing one mechanism over the other. Participants heard sentences or word lists and attempted to repeat them verbatim after a 5-second delay...
May 17, 2017: NeuroImage
https://www.readbyqxmd.com/read/28522044/trends-in-indoor-tanning-and-its-association-with-sunburn-among-us-adults
#13
Gery P Guy, Meg Watson, Andrew B Seidenberg, Anne M Hartman, Dawn M Holman, Frank Perna
No abstract text is available yet for this article.
June 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28513200/hiv-infected-individuals-who-use-alcohol-and-other-drugs-and-virologic-suppression
#14
Seonaid Nolan, Alexander Y Walley, Timothy C Herren, Gregory J Patts, Alicia S Ventura, Meg M Sullivan, Jeffrey H Samet, Richard Saitz
People living with HIV (PLWH) on antiretroviral therapy (ART) who use substances were examined to (a) describe those with virologic control and (b) determine which substance use-factors are associated with lack of virologic control. Participants were adult PLWH taking ART with either past 12-month DSM-IV substance dependence or past 30-day alcohol or illicit drug use. Substance use factors included number of DSM-IV alcohol or drug dependence criteria and past 30-day specific substance use. Associations with HIV viral load (HVL) (<200 vs...
May 17, 2017: AIDS Care
https://www.readbyqxmd.com/read/28510905/zoomed-mri-guided-by-combined-eeg-meg-source-analysis-a-multimodal-approach-for-optimizing-presurgical-epilepsy-work-up-and-its-application-in-a-multi-focal-epilepsy-patient-case-study
#15
Ü Aydin, S Rampp, A Wollbrink, H Kugel, J -H Cho, T R Knösche, C Grova, J Wellmer, C H Wolters
In recent years, the use of source analysis based on electroencephalography (EEG) and magnetoencephalography (MEG) has gained considerable attention in presurgical epilepsy diagnosis. However, in many cases the source analysis alone is not used to tailor surgery unless the findings are confirmed by lesions, such as, e.g., cortical malformations in MRI. For many patients, the histology of tissue resected from MRI negative epilepsy shows small lesions, which indicates the need for more sensitive MR sequences...
May 16, 2017: Brain Topography
https://www.readbyqxmd.com/read/28507138/stem-cell-migration-and-mechanotransduction-on-linear-stiffness-gradient-hydrogels
#16
William J Hadden, Jennifer L Young, Andrew W Holle, Meg L McFetridge, Du Yong Kim, Philip Wijesinghe, Hermes Taylor-Weiner, Jessica H Wen, Andrew R Lee, Karen Bieback, Ba-Ngu Vo, David D Sampson, Brendan F Kennedy, Joachim P Spatz, Adam J Engler, Yu Suk Choi
The spatial presentation of mechanical information is a key parameter for cell behavior. We have developed a method of polymerization control in which the differential diffusion distance of unreacted cross-linker and monomer into a prepolymerized hydrogel sink results in a tunable stiffness gradient at the cell-matrix interface. This simple, low-cost, robust method was used to produce polyacrylamide hydrogels with stiffness gradients of 0.5, 1.7, 2.9, 4.5, 6.8, and 8.2 kPa/mm, spanning the in vivo physiological and pathological mechanical landscape...
May 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28505586/oscillatory-magnetic-brain-activity-is-related-to-dissociative-symptoms-and-childhood-adversities-a-study-in-women-with-multiple-trauma
#17
I Schalinski, J K Moran, T Elbert, V Reindl, C Wienbruch
BACKGROUND: Individuals with trauma-related disorders are complex and heterogeneous; part of this complexity derives from additional psychopathology like dissociation as well as environmental adversities such as traumatic stress, experienced throughout the lifespan. Understanding the neurophysiological abnormalities in Post-traumatic stress disorder (PTSD) requires a simultaneous consideration of these factors. METHODS: Resting state magnetoencephalography (MEG) recordings were obtained from 41 women with PTSD and comorbid depressive symptoms, and 16 healthy women...
May 8, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28505581/spatiotemporal-reorganization-of-the-reading-network-in-adult-dyslexia
#18
Eddy Cavalli, Pascale Colé, Chotiga Pattamadilok, Jean-Michel Badier, Christelle Zielinski, Valérie Chanoine, Johannes C Ziegler
Developmental dyslexia is characterized by impairments in reading fluency and spelling that persist into adulthood. Here, we hypothesized that high-achieving adult dyslexics (i.e., university students with a history of dyslexia) manage to cope with these deficits by relying to a greater extent on morphological information than do non-impaired adult readers. We used magnetoencephalography (MEG) in a primed lexical decision task, in which we contrasted orthographic, morphological and semantic processing. Behavioral results confirmed that adult dyslexics did indeed rely to a greater extent on the semantic properties of morphemes than controls...
April 24, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28502575/national-assessment-of-hpv-and-pap-tests-changes-in-cervical-cancer-screening-national-health-interview-survey
#19
Meg Watson, Vicki Benard, Jessica King, Anatasha Crawford, Mona Saraiya
BACKGROUND: Major organizations recommend cytology screening (Pap test) every 3years for women aged 21-65; women aged 30 to 65 have the option of adding the HPV test (co-test) every 5years. We examined national percentages of cervical cancer screening, and we examined use of co-testing as an option for screening. METHODS: We used 2015 U.S. National Health Interview Survey (NHIS) data to examine recent cervical cancer screening (Pap test within 3years among women aged 21-65 without a hysterectomy; N=10,596) and co-testing (N=9,125)...
May 11, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28501539/spatiotemporal-oscillatory-dynamics-of-visual-selective-attention-during-a-flanker-task
#20
Timothy J McDermott, Alex I Wiesman, Amy L Proskovec, Elizabeth Heinrichs-Graham, Tony W Wilson
The flanker task is a test of visual selective attention that has been widely used to probe error monitoring, response conflict, and related constructs. However, to date, few studies have focused on the selective attention component of this task and imaged the underlying oscillatory dynamics serving task performance. In this study, 21 healthy adults successfully completed an arrow-based version of the Eriksen flanker task during magnetoencephalography (MEG). All MEG data were pre-processed and transformed into the time-frequency domain...
May 10, 2017: NeuroImage
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