Auditory-evoked EEG oscillations associated with prepulse inhibition (PPI) of auditory startle reflex in healthy humans.
The aim of the current study was to investigate the prepulse inhibition (PPI) of auditory-evoked delta, alpha, and gamma oscillations. Concurrent EEG and auditory startle reflex were recorded from 15 healthy participants during Pulse-Alone and Prepulse+Pulse trials with 60, 120, and 240 ms prepulse-pulse intervals. A significant PPI of the startle reflex on all Prepulse+Pulse trials was associated with a significant PPI of alpha oscillations at central and temporal locations and of gamma oscillations at frontal, central, and temporal locations on some Prepulse+Pulse trials. PPI of delta oscillations was not observed. These results confirm our recent finding stating that PPI functions as a sensory-motor as well as a sensory-cognitive gating mechanism because alpha and gamma oscillations mediate cognitive processes.
Kedzior
Karina Karolina
KK
Institute of Psychology and Cognition Research, University of Bremen, Germany. kkedzior@graduate.uwa.edu
Koch
Michael
M
Basar-Eroglu
Canan
C
D000161:Acoustic Stimulation / Q000379:methods; D000328:Adult; D001931:Brain Mapping; D004569:Electroencephalography; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D006801:Humans; D007266:Inhibition, Psychological; D008297:Male; D011930:Reaction Time; D013216:Reflex, Startle / Q000502:physiology* / Q000528:radiation effects; D013997:Time Factors