نتایج جستجو برای: evoked magnetic fields

تعداد نتایج: 578127  

Mahdieh Sharifi Fard, Mohammad Reza Monazzam Parvin Nasiri

Introduction: Recent industrial developments in human societies have caused rapid advancements in technologies of production and distribution of electricity, which in turn result in enhancement of power networks and utilization of high voltages. These networks and the high voltages in transfer lines cause the exposure to electric and magnetic fields. In this study, the situation regarding the m...

ژورنال: ارگونومی 2015
عزیزی, مهتاب, علی‌آبادی, محسن , گلمحمدی, رستم,

Introduction: In recent years, compact fluorescent lamps have been more widely used across the country as a means of optimizing energy consumption. Given the health consequences of lighting sources, the present study was conducted to investigate the intensity of electromagnetic fields emitted by common compact fluorescent lamps. Materials and Methods: The study examined 54 compact fluo...

Background: Expansion of the use of magnetic fields in metals, mining, transport, research, and medicine industries has led to a discussion about the effects of magnetic fields and whether their strength is negligible. The aim of this study was to investigate the effects of magnetic field on the viability and proliferation rate of HeLa cells. Materials and methods: We studied the effects of ma...

Journal: :Neuroscience letters 1997
F Spengler T P Roberts D Poeppel N Byl X Wang H A Rowley M M Merzenich

Adult humans were unilaterally trained in a tactile discrimination task of sequentially applied multi-finger stimuli. Magnetic source imaging (MSI) was performed before and after the training to evaluate use-dependent neuronal plasticity. All subjects showed fast improvements in performance and complete transfer of the learned task. MSI recordings revealed an unilateral decrease in current dipo...

Journal: :Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan 1986

In this paper, a semi-analytical solution for magneto-thermo-elastic problem in an axisymmetric functionally graded (FG) hollow rotating disk with constant thickness placed in uniform magnetic and thermal fields with heat convection from disk’s surfaces is presented. Solution for stresses and perturbation of magnetic field vector in a thin FG rotating disk is determined using infinitesimal theo...

Journal: :amirkabir international journal of electrical & electronics engineering 2015
r. khosravi s. h. sadeghi r. moini

the produced electric and magnetic fields due to lightning strikes to mountainous ground are determined in this paper. for the sake of simplicity a cone-shaped ground with finite conductivity is assumed to represent a natural nonflat ground. by this assumption, we deal with an axillary symmetrical structure so we use the cylindrical 2d-fdtd to save the simulation memory and time, dramatically. ...

2005
Mary Ann Walter Valentine Hacquard

Subjects (n=12) listened to the synthesized syllable tokens ba, da, ma, and na. Evoked magnetic fields were recorded using a 93sensor whole-head biomagnetometer array while subjects performed a same-different judgment task. A model of phonology which does not incorporate underspecification predicts no difference in the MMF for labial/coronal consonant pairs, regardless of which is presented as ...

Journal: :Social neuroscience 2008
Hein T van Schie Thomas Koelewijn Ole Jensen Robert Oostenveld Eric Maris Harold Bekkering

Lateralized magnetic fields were recorded from 12 subjects using a 151 channel magnetoencephalography (MEG) system to investigate temporal and functional properties of motor activation to the observation of goal-directed hand movements by a virtual actor. Observation of left and right hand movements generated a neuromagnetic lateralized readiness field (LRF) over contralateral motor cortex. The...

2016
Alexander D. Tang Andrea S. Lowe Andrew R. Garrett Robert Woodward William Bennett Alison J. Canty Michael I. Garry Mark R. Hinder Jeffery J. Summers Roman Gersner Alexander Rotenberg Gary Thickbroom Joseph Walton Jennifer Rodger

Rodent models of transcranial magnetic stimulation (TMS) play a crucial role in aiding the understanding of the cellular and molecular mechanisms underlying TMS induced plasticity. Rodent-specific TMS have previously been used to deliver focal stimulation at the cost of stimulus intensity (12 mT). Here we describe two novel TMS coils designed to deliver repetitive TMS (rTMS) at greater stimulat...

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