Address reprint requests to: Frances K. Graham or Robert F. Simons, Department of Psychology, University of Delaware, Newark, DE 19716.
Lead stimulation effects on reflex blink, exogenous brain potentials, and loudness judgments
Article first published online: 30 JAN 2007
Volume 30, Issue 4, pages 347–358, July 1993
How to Cite
PERLSTEIN, W. M., FIORITO, E., SIMONS, R. F. and GRAHAM, F. K. (1993), Lead stimulation effects on reflex blink, exogenous brain potentials, and loudness judgments. Psychophysiology, 30: 347–358. doi: 10.1111/j.1469-8986.1993.tb02056.x
This research was supported by National Institute of Mental Health grants K5-MH21762 and R01-MH42465. The work was reported in part at the Twenty-ninth Annual Meeting of the Society for Psychophysiological Research in New Orleans, LA, October 1989, and Experiment 2 was submitted by the first author in partial fulfillment of requirements for the Master of Arts degree.
We gratefully acknowledge the assistance of Richard Freed in the scoring of midlatency evoked potentials.
- Issue published online: 30 JAN 2007
- Article first published online: 30 JAN 2007
- (Received January 31, 1991; Accepted June 16, 1992)
- Prepulse inhibition;
- Blink reflex;
- Exogenous evoked potentials;
- Midlatency potentials;
- Magnitude estimation
Prepulse inhibition of the reflex blink by a weak stimulus shortly preceding a blink-eliciting stimulus has been described as a sensorimotor gating phenomenon that may protect processing of the first stimulus. To determine how a stimulus configuration that elicits prepulse inhibition also affects exogenous evoked potentials and perceived loudness of the paired stimuli, the three types of response were recorded simultaneously under four conditions: tone pairs of 75–110 dB and 75–75 dB and single control tones of each intensity. Two studies using different intrapair intervals found that blinks and exogenous potentials peaking after 50 ms were smaller for the second tone of pairs than for equal-intensity single tones. Pairing also reduced the loudness of 110-dB second tones, but the loudness of 75-dB first and second tones was unaffected or increased. These effects are discussed in terms of parallel processing of transient, unmodulated information in specific paths, steady-state modulated information in nonspecific paths, and a context-dependent effect on loudness judgments.