Choosing the Optimal Trigger Point for Analysis of Movements after Stroke Based on Magnetoencephalographic Recordings
Joint Authors
Woldag, Hartwig
Hummelsheim, Horst
Waldmann, Guido
Schauer, Michael
Source
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-01-13
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
The aim of this study was to select the optimal procedure for analysing motor fields (MF) and motor evoked fields (MEF) measured from brain injured patients.
Behavioural pretests with patients have shown that most of them cannot stand measurements longer than 30 minutes and they also prefer to move the hand with rather short breaks between movements.
Therefore, we were unable to measure the motor field (MF) optimally.
Furthermore, we planned to use MEF to monitor cortical plasticity in a motor rehabilitation procedure.
Classically, the MF analysis refers to rather long epochs around the movement onset (M-onset).
We shortened the analysis epoch down to a range from 1000 milliseconds before until 500 milliseconds after M-onset to fulfil the needs of the patients.
Additionally, we recorded the muscular activity (EMG) by surface electrodes on the extensor carpi ulnaris and flexor carpi ulnaris muscles.
Magnetoencephalographic (MEG) data were recorded from 9 healthy subjects, who executed horizontally brisk extension and flexion in the right wrist.
Significantly higher MF dipole strength was found in data based on EMG-onset than in M-onset based data.
There was no difference in MEF I dipole strength between the two trigger latencies.
In conclusion, we recommend averaging in respect to the EMG-onset for the analysis of both components MF as well as MEF.
American Psychological Association (APA)
Waldmann, Guido& Schauer, Michael& Woldag, Hartwig& Hummelsheim, Horst. 2010. Choosing the Optimal Trigger Point for Analysis of Movements after Stroke Based on Magnetoencephalographic Recordings. Stroke Research and Treatment،Vol. 2010, no. 2010, pp.1-6.
https://search.emarefa.net/detail/BIM-473836
Modern Language Association (MLA)
Waldmann, Guido…[et al.]. Choosing the Optimal Trigger Point for Analysis of Movements after Stroke Based on Magnetoencephalographic Recordings. Stroke Research and Treatment No. 2010 (2010), pp.1-6.
https://search.emarefa.net/detail/BIM-473836
American Medical Association (AMA)
Waldmann, Guido& Schauer, Michael& Woldag, Hartwig& Hummelsheim, Horst. Choosing the Optimal Trigger Point for Analysis of Movements after Stroke Based on Magnetoencephalographic Recordings. Stroke Research and Treatment. 2010. Vol. 2010, no. 2010, pp.1-6.
https://search.emarefa.net/detail/BIM-473836
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-473836