This study was supported by the Program for the Strategic Research Foundation at Private Universities (MEXT) to Kansei Fukushi Research Institute, Tohoku Fukushi University (2008–2012).
Auditory startle reflex inhibited by preceding self-action
Article first published online: 7 OCT 2013
Copyright © 2013 Society for Psychophysiological Research
Volume 51, Issue 1, pages 97–102, January 2014
How to Cite
Kawachi, Y., Matsue, Y., Shibata, M., Imaizumi, O. and Gyoba, J. (2014), Auditory startle reflex inhibited by preceding self-action. Psychophysiology, 51: 97–102. doi: 10.1111/psyp.12150
- Issue published online: 11 DEC 2013
- Article first published online: 7 OCT 2013
- Manuscript Accepted: 6 AUG 2013
- Manuscript Received: 27 SEP 2012
- Private Universities (MEXT)
- Prepulse inhibition;
- Temporal window
A startle reflex to a startle pulse is inhibited when preceded by a prestimulus. We introduced a key-press action (self-action) or an 85 dB noise burst as a prestimulus, followed by a 115 dB noise burst as a startle pulse. We manipulated temporal offsets between the prestimulus and the startle pulse from 30–1,500 ms to examine whether self-action modulates the startle reflex and the temporal properties of the modulatory effect. We assessed eyeblink reflexes by electromyography. Both prestimuli decreased reflexes compared to pulse-alone trials. Moreover, the temporal windows of inhibition were different between the types of prestimuli. A faster maximal inhibition and narrower temporal window in self-action trials suggest that preceding self-action inhibits the startle reflex and allows prediction of the coming pulse in different ways from auditory prestimuli.