Zobrazeno 1 - 10 of 119 pro vyhledávání: '"John O, Willoughby"'
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Akademický článek
Managing electromyogram contamination in scalp recordings: An approach identifying reliable beta and gamma EEG features of psychoses or other disorders
Autor: Kenneth J. Pope, Trent W. Lewis, Sean P. Fitzgibbon, Azin S. Janani, Tyler S. Grummett, Patricia A. H. Williams, Malcolm Battersby, Tarun Bastiampillai, Emma M. Whitham, John O. Willoughby
Publikováno v: Brain and Behavior, Vol 12, Iss 9, Pp n/a-n/a (2022)
Abstract Objective In publications on the electroencephalographic (EEG) features of psychoses and other disorders, various methods are utilized to diminish electromyogram (EMG) contamination. The extent of residual EMG contamination using these metho
Externí odkaz: https://doaj.org/article/e8d598e19f8f4589ad004efb303a0fa6
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3
Akademický článek
Constitutive spectral EEG peaks in the gamma range: suppressed by sleep, reduced by mental activity and resistant to sensory stimulation
Autor: Tyler Samuel Grummett, Sean Patrick Fitzgibbon, Trent Wilson Lewis, Dylan eDeLosAngeles, Emma Mary Whitham, Kenneth John Pope, John O Willoughby
Publikováno v: Frontiers in Human Neuroscience, Vol 8 (2014)
Objective: In a systematic study of gamma activity in neuro-psychiatric disease, we unexpectedly observed distinctive, apparently persistent, electroencephalogram (EEG) spectral peaks in the gamma range (25-100 Hz). Our objective, therefore, was to e
Externí odkaz: https://doaj.org/article/76878013073e4e8c8ce8a945f426f1ba
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4
Resting cranial and upper cervical muscle activity is increased in patients with migraine
Autor: Emma M. Whitham, Dean H Watson, Tyler S. Grummett, Hanieh Bakhshayesh, John O. Willoughby, Azin S. Janani, Trent W. Lewis, Kenneth J. Pope, Nicole Fenton
Publikováno v: Clinical Neurophysiology. 129:1913-1919
Objective To compare comprehensive measures of scalp-recorded muscle activity in migraineurs and controls. Method We used whole-of-head high-density scalp electrical recordings, independent component analysis (ICA) and spectral slope of the derived c
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b3c1a1079606cb07bd94ba68a72ae7c
https://doi.org/10.1016/j.clinph.2018.06.017
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5
Improved artefact removal from EEG using Canonical Correlation Analysis and spectral slope
Autor: Trent W. Lewis, Dylan DeLosAngeles, John O. Willoughby, Hanieh Bakhshayesh, Tyler S. Grummett, Sean P. Fitzgibbon, Kenneth J. Pope, Emma M. Whitham, Azin S. Janani
Publikováno v: Journal of Neuroscience Methods. 298:1-15
Background Contamination of scalp measurement by tonic muscle artefacts, even in resting positions, is an unavoidable issue in EEG recording. These artefacts add significant energy to the recorded signals, particularly at high frequencies. To enable
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::014ba3aafad3de9e9c5a1b7f9c7abc86
https://doi.org/10.1016/j.jneumeth.2018.01.004
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6
Fast and effective removal of contamination from scalp electrical recordings
Autor: Tyler S. Grummett, John O. Willoughby, Dylan DeLosAngeles, Azin S. Janani, Trent W. Lewis, Emma M. Whitham, Kenneth J. Pope, Hanieh Bakhshayesh
Publikováno v: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology. 131(1)
Objective To present a new, automated and fast artefact-removal approach which significantly reduces the effect of contamination in scalp electrical recordings. Method We used spectral and temporal characteristics of different sources recorded during
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50d16cf3ae5aa3b6716fedcb20265489
https://pubmed.ncbi.nlm.nih.gov/31751841
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7
How Many Channels are Enough? Evaluation of Tonic Cranial Muscle Artefact Reduction Using ICA with Different Numbers of EEG Channels
Autor: Kenneth J. Pope, Trent W. Lewis, Tyler S. Grummett, Hanieh Bakhshayesh, John O. Willoughby, Azin S. Janani
Publikováno v: EUSIPCO
Scalp electrical recordings, or electroencephalograms (EEG), are heavily contaminated by cranial and cervical muscle activity from as low as 20 hertz, even in relaxed conditions. It is therefore necessary to reduce or remove this contamination to ena
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16a68a1687c054fdf5c2e7e84241835f
https://doi.org/10.23919/eusipco.2018.8553261
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8
Beamforming and Blind Source Separation Have a Complementary Effect in Reducing Tonic Cranial Muscle Contamination of Scalp Measurements
Autor: John O. Willoughby, Tyler S. Grummett, Hanieh Bakhshayesh, Kenneth J. Pope, Azin S. Janani
Publikováno v: EUSIPCO
Scalp electroencephalograms (EEG) are susceptible to cranial and cervical muscle contamination from frequencies as low as 20 hertz, even in relaxed conditions. Reliably recording cognitive activity, which is in this range, is impossible without remov
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::91aeda52f865c8cfa31096926cf781b3
https://doi.org/10.23919/eusipco.2018.8553014
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9
Surface Laplacian of scalp electrical signals and independent component analysis resolve EMG contamination of electroencephalogram
Autor: Dylan DeLosAngeles, Sean P. Fitzgibbon, David M. W. Powers, John O. Willoughby, Kenneth J. Pope, Emma M. Whitham, Trent W. Lewis
Publikováno v: International Journal of Psychophysiology. 97:277-284
The serious impact of electromyogram (EMG) contamination of electroencephalogram (EEG) is well recognised. The objective of this research is to demonstrate that combining independent component analysis with the surface Laplacian can eliminate EMG con
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9eca210dca9f11914c4b1535ffb3aa3d
https://doi.org/10.1016/j.ijpsycho.2014.10.006
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10
Evaluation of a minimum-norm based beamforming technique, sLORETA, for reducing tonic muscle contamination of EEG at sensor level
Autor: John O. Willoughby, Emma M. Whitham, Kenneth J. Pope, Azin S. Janani, Hanieh Bakhshayesh, Sean P. Fitzgibbon, Trent W. Lewis, Dylan DeLosAngeles, Tyler S. Grummett
Publikováno v: Journal of neuroscience methods. 288
Background Cranial and cervical muscle activity (electromyogram, EMG) contaminates the surface electroencephalogram (EEG) from frequencies below 20 through to frequencies above 100 Hz. It is not possible to have a reliable measure of cognitive tasks
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d09addcfd02b722d38ab049dfe42721e
https://pubmed.ncbi.nlm.nih.gov/28648714
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