2
|
Abd El-Samie FE, Alotaiby TN, Khalid MI, Alshebeili SA, Aldosari SA. A Review of EEG and MEG Epileptic Spike Detection Algorithms. IEEE ACCESS 2018; 6:60673-60688. [DOI: 10.1109/access.2018.2875487] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
3
|
Matsuzaki J, Kagitani-Shimono K, Sugata H, Hirata M, Hanaie R, Nagatani F, Tachibana M, Tominaga K, Mohri I, Taniike M. Progressively increased M50 responses to repeated sounds in autism spectrum disorder with auditory hypersensitivity: a magnetoencephalographic study. PLoS One 2014; 9:e102599. [PMID: 25054201 PMCID: PMC4108353 DOI: 10.1371/journal.pone.0102599] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Accepted: 06/20/2014] [Indexed: 12/31/2022] Open
Abstract
The aim of this study was to investigate the differential time-course responses of the auditory cortex to repeated auditory stimuli in children with autism spectrum disorder (ASD) showing auditory hypersensitivity. Auditory-evoked field values were obtained from 21 boys with ASD (12 with and 9 without auditory hypersensitivity) and 15 age-matched typically developing controls. M50 dipole moments were significantly increased during the time-course study only in the ASD with auditory hypersensitivity compared with those for the other two groups. The boys having ASD with auditory hypersensitivity also showed more prolonged response duration than those in the other two groups. The response duration was significantly related to the severity of auditory hypersensitivity. We propose that auditory hypersensitivity is associated with decreased inhibitory processing, possibly resulting from an abnormal sensory gating system or dysfunction of inhibitory interneurons.
Collapse
Affiliation(s)
- Junko Matsuzaki
- Molecular Research Center for Children’s Mental Development, United Graduate School of Child Development, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kuriko Kagitani-Shimono
- United Graduate School of Child Development, Osaka University Graduate School of Medicine, Osaka, Japan
- Department of Pediatrics, Osaka University Graduate School of Medicine, Osaka, Japan
- * E-mail:
| | - Hisato Sugata
- Department of Neurosurgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Masayuki Hirata
- Department of Neurosurgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Ryuzo Hanaie
- United Graduate School of Child Development, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Fumiyo Nagatani
- Molecular Research Center for Children’s Mental Development, United Graduate School of Child Development, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Masaya Tachibana
- Molecular Research Center for Children’s Mental Development, United Graduate School of Child Development, Osaka University Graduate School of Medicine, Osaka, Japan
- United Graduate School of Child Development, Osaka University Graduate School of Medicine, Osaka, Japan
- Department of Pediatrics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Koji Tominaga
- United Graduate School of Child Development, Osaka University Graduate School of Medicine, Osaka, Japan
- Department of Pediatrics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Ikuko Mohri
- Molecular Research Center for Children’s Mental Development, United Graduate School of Child Development, Osaka University Graduate School of Medicine, Osaka, Japan
- United Graduate School of Child Development, Osaka University Graduate School of Medicine, Osaka, Japan
- Department of Pediatrics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Masako Taniike
- Molecular Research Center for Children’s Mental Development, United Graduate School of Child Development, Osaka University Graduate School of Medicine, Osaka, Japan
- United Graduate School of Child Development, Osaka University Graduate School of Medicine, Osaka, Japan
- Department of Pediatrics, Osaka University Graduate School of Medicine, Osaka, Japan
| |
Collapse
|
4
|
Wennberg R, Cheyne D. Reliability of MEG source imaging of anterior temporal spikes: analysis of an intracranially characterized spike focus. Clin Neurophysiol 2013; 125:903-18. [PMID: 24210513 DOI: 10.1016/j.clinph.2013.08.032] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Revised: 07/28/2013] [Accepted: 08/21/2013] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To assess the reliability of MEG source imaging (MSI) of anterior temporal spikes through detailed analysis of the localization and orientation of source solutions obtained for a large number of spikes that were separately confirmed by intracranial EEG to be focally generated within a single, well-characterized spike focus. METHODS MSI was performed on 64 identical right anterior temporal spikes from an anterolateral temporal neocortical spike focus. The effects of different volume conductors (sphere and realistic head model), removal of noise with low frequency filters (LFFs) and averaging multiple spikes were assessed in terms of the reliability of the source solutions. RESULTS MSI of single spikes resulted in scattered dipole source solutions that showed reasonable reliability for localization at the lobar level, but only for solutions with a goodness-of-fit exceeding 80% using a LFF of 3 Hz. Reliability at a finer level of intralobar localization was limited. Spike averaging significantly improved the reliability of source solutions and averaging 8 or more spikes reduced dependency on goodness-of-fit and data filtering. CONCLUSIONS MSI performed on topographically identical individual spikes from an intracranially defined classical anterior temporal lobe spike focus was limited by low reliability (i.e., scattered source solutions) in terms of fine, sublobar localization within the ipsilateral temporal lobe. Spike averaging significantly improved reliability. SIGNIFICANCE MSI performed on individual anterior temporal spikes is limited by low reliability. Reduction of background noise through spike averaging significantly improves the reliability of MSI solutions.
Collapse
Affiliation(s)
- Richard Wennberg
- Krembil Neuroscience Centre, Division of Neurology, Toronto Western Hospital, University of Toronto, 399 Bathurst Street, Toronto, ON M5T 2S8, Canada.
| | - Douglas Cheyne
- Program in Neurosciences and Mental Health, Research Institute, The Hospital for Sick Children, University of Toronto, Toronto, ON M5G 1X8, Canada
| |
Collapse
|
5
|
Uda T, Tsuyuguchi N, Okumura E, Shigihara Y, Nagata T, Terakawa Y, Sakamoto S, Ohata K. Extension of Quantifiable Modification of sLORETA for Induced Oscillatory Changes in Magnetoencephalography. Open Neuroimag J 2012; 6:37-43. [PMID: 22870168 PMCID: PMC3412199 DOI: 10.2174/1874440001206010037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 03/14/2012] [Accepted: 03/20/2012] [Indexed: 11/22/2022] Open
Abstract
Quantifiable modification of standardized low-resolution brain electromagnetic tomography (sLORETA-qm), which is one of the non-adaptive beamformer spatial filtering techniques, has been applied to source localization and quantification of evoked field or oscillatory changes in magnetoencephalography (MEG). Here, we extended this technique to induced oscillatory brain activity changes, so-called event-related desynchronization or event-related synchronization. For localizing of significantly activated brain areas at the whole-brain level, permutation tests and multiple comparison corrections with false discovery rate were applied. Induced β- and γ-band oscillatory changes by right hand clenching task were demonstrated as an example of simple induced brain activity.
Collapse
Affiliation(s)
- Takehiro Uda
- Department of Neurosurgery, Osaka City University Graduate School of Medicine, Japan
| | | | | | | | | | | | | | | |
Collapse
|