NDLI: Inhibitory interference to abandonment of voluntary finger movement by single-pulse transcranial magnetic stimulation

Content Provider	IEEE Xplore Digital Library
Author	Tokiwa, T. Ishimaru, N. Fukuda, H. Hiwaki, O.
Copyright Year	2013
Description	Author affiliation: Grad. Sch. of Inf. Sci., Hiroshima City Univ., Hiroshima, Japan (Tokiwa, T.; Ishimaru, N.; Fukuda, H.; Hiwaki, O.)
Abstract	Brain function dynamics related to an inhibitory interference in voluntary motor abandonment was investigated with single-pulse transcranial magnetic stimulation (TMS) and electroencephalogram (EEG). As the voluntary motor movement, a point-to-point reaching movement of the right index-finger was conducted. The starting time of the movement was indicated with the clock making one revolution for 4 s. The time the clock hand passed the 9 o'clock position was defined as a go-signal. In the go trials, the subject was instructed to start the movement at the timing of the go signal. In some trials, called as pre-stop trials, a stop signal was presented with red LED illumination -100 ms from the timing of the go-signal. The go-trials and pre-stop trials were randomly performed in the series of the trials. In all trials, TMS or sham-TMS were conducted. TMS was delivered with a round coil on the subject's head at various timings. Sham-TMS trials were with a click sound of TMS produced by another coil located near the head without the brain stimulation. In the sham-TMS trials of the pre-stop trials, the subject was able to prevent the finger movement. However, the TMS conducted at -150, -100 or -50 ms from the go-signal induced the involuntary finger movement in the pre-stop trials. We also measured brain potentials in the sham-TMS and TMS trials. The potential at Fz electrode showed a large positive peak in the sham-TMS trials of the pre-stop trials, whereas the potentials at the same latency were attenuated in the TMS trials of the pre-stop trials. These results indicated that the single-pulse TMS applied around the stop-signal in the reaching finger movement could intervene in the brain function of the voluntary motor abandonment conducted at medial frontal cortex.
Starting Page	6373
Ending Page	6376
File Size	2887551
Page Count	4
File Format	PDF
ISBN	9781457702167
ISSN	1557170X
DOI	10.1109/EMBC.2013.6611012
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-07-03
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thumb Electric potential Educational institutions Clocks Scalp Electroencephalography
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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