Event-related potential study to aversive auditory stimuli.
In an auditory oddball task emotionally negative (aversive) sounds (e.g. rubbing together of polystyrene) and everyday sounds (e.g. ringing of a bicycle bell) were presented as task-irrelevant (novel) sounds. Both the aversive and the everyday sounds elicited the orientation-related P3a component of the event-related potentials (ERPs). In the 154-250 ms range the ERPs for the aversive sounds were more negative than the ERP of the everyday sounds. For the aversive sounds, this negativity was followed by a frontal positive wave (372-456 ms). The aversive sounds elicited larger late positive shift than the everyday sounds. The early negativity is considered as an initial effect in a broad neural network including limbic structures, while the later is related to the cognitive assessment of the stimuli and to memory-related processes.
Czigler
István
I
Institute for Psychology of the Hungarian Academy of Sciences, Hungary. czigler@cogpsyphy.hu
Cox
Trevor J
TJ
Gyimesi
Kinga
K
Horváth
János
J
D000161:Acoustic Stimulation / Q000009:adverse effects*; D000328:Adult; D004569:Electroencephalography; D004644:Emotions / Q000502:physiology; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005074:Evoked Potentials, Visual / Q000502:physiology; D019706:Excitatory Postsynaptic Potentials / Q000502:physiology; D005260:Female; D006801:Humans; D008032:Limbic System / Q000502:physiology; D008297:Male; D008568:Memory / Q000502:physiology; D009042:Motivation; D009415:Nerve Net / Q000502:physiology; D009949:Orientation; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology