Estimating multiple sources in somatosensory area to SEF of finger stimulus using SVD and time-frequency analysis
by Bong-Soo Kim, Yoshinori Uchikawa
International Journal of Modelling, Identification and Control (IJMIC), Vol. 4, No. 4, 2008

Abstract: In order to discriminate multiple sources in the somatosensory area of the human cortex, we measured the somatosensory evoked field (SEF) with three different finger stimulations. First, the proposed method combining singular value decomposition and time-frequency analysis was applied to the measured SEF data for discrimination of second somatosensory (SII) activity from primary somatosensory (SI) activity overlapping in time. The SII activity was represented by the reconstructed SEF data using the fourth (the thumb) and fifth (fourth finger) singular value, respectively. Second, the frequency of the dominant power spectrum in each SEF data was investigated and the frequency of the fourth finger stimulation existed between the thumb (16-18 Hz) and little finger (13-15 Hz). Source localisation was done by the SEF data to the fourth finger stimulation with different frequency ranges (13-15 Hz and 16-18 Hz BPF). We conclude that the proposed method is useful for discriminating multiple source activities of the somatosensory area overlapping in time.

Online publication date: Fri, 28-Nov-2008

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Modelling, Identification and Control (IJMIC):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com