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Discrete and continuous prepulses have differential effects on startle prepulse inhibition and skin conductance orienting
Author(s) -
Wynn Jonathan K.,
Dawson Michael E.,
Schell Anne M.
Publication year - 2000
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/1469-8986.3720224
Subject(s) - prepulse inhibition , skin conductance , moro reflex , psychology , startle response , white noise , stimulus (psychology) , audiology , neuroscience , cognitive psychology , reflex , medicine , computer science , telecommunications , schizophrenia (object oriented programming) , psychiatry , biomedical engineering
The effectiveness of different types of auditory prepulses in eliciting skin conductance orienting and in producing prepulse inhibition (PPI) of the acoustic startle eyeblink was studied in two experiments. A discrete white noise prepulse produced greater PPI than either a continuous white noise, a discrete tone, or a continuous tone. The discrete white noise advantage was not due to similarity in bandwidth to the startle pulse or to a refractory effect of the prepulse. Moreover, a dissociation between PPI and skin conductance orienting was seen in both experiments. PPI using auditory prepulses appears to be dependent primarily on the acoustic characteristics of the transient portion of the prepulse, whereas skin conductance orienting is more dependent on the sustained portions of the stimulus.