Document Detail


Slow brain potentials after withdrawal of control.
MedLine Citation:
PMID:  7159206     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The present experiment was designed to replicate and extend the previous finding of an increased postimperative negative slow brain potential shift (PINV) in healthy subjects following an unexpected change from the condition of control over an aversive imperative stimulus to that of loss of control. Two groups of 16 male students each participated in a constant-foreperiod reaction time paradigm with two warning stimuli (WS), each of 6 s duration, followed by two imperative stimuli (IS) of either aversive (loud noise) or neutral (soft tone) quality. The experimental subjects could terminate each IS by pressing a microswitch within 300 ms of IS-onset. After they had experienced this contingency for 40 trials, control was withdrawn in that the IS lasted for 5 s during another 40-trial block, irrespective of the actual motor response of the subject. The yoked control subjects received the same stimuli and performed the same motor response as the experimental subjects, but experienced no contingency between response and IS-termination. EEGs were recorded monopolarly from Fz, Cz, and Pz. In response to the unexpectedly uncontrollable aversive IS, the experimental subjects showed a pronounced PINV over frontal areas, while no comparable PINV developed in yoked controls. Experimental subjects showed no PINV during the first trial block (control conditions), and in response to the neutral uncontrollable IS. Statistical analyses of principle components documented that the PINV can be considered an independent endogenous component.
Authors:
T Elbert; B Rockstroh; W Lutzenberger; N Birbaumer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Archiv für Psychiatrie und Nervenkrankheiten     Volume:  232     ISSN:  -     ISO Abbreviation:  Arch Psychiatr Nervenkr     Publication Date:  1982  
Date Detail:
Created Date:  1983-03-17     Completed Date:  1983-03-17     Revised Date:  2012-08-10    
Medline Journal Info:
Nlm Unique ID:  1270313     Medline TA:  Arch Psychiatr Nervenkr     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  201-14     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Avoidance Learning / physiology
Cerebral Cortex / physiology*
Cognition / physiology
Contingent Negative Variation*
Electroencephalography*
Electrophysiology*
Eye Movements
Galvanic Skin Response / physiology
Heart Rate
Humans
Male
Motor Skills / physiology
Pitch Discrimination / physiology
Reaction Time / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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