Document Detail

Modulation of slow cortical potentials by instrumentally learned blood pressure responses.
MedLine Citation:
PMID:  1635957     Owner:  NLM     Status:  MEDLINE    
We assessed whether instrumentally-learned pressor responses inhibit electrocortical activity, as predicted by learning theories of idiopathic hypertension. Subjects received beat-by-beat feedback for increases and decreases in mean arterial pressure measured from the finger (Peñáz method). Slow potentials were recorded from the midsagittal line during the final training session. Also recorded at this time were heart rate, eye movements, respiration, and post-session verbal reports of the subject's control strategies. Thirteen of 14 subjects differentiated blood pressure increases and decreases at p less than .05 or better during the final session (within-subject discriminative operant procedure). Slow potentials were less negative on blood pressure increase compared to decrease trials at all midsagittal sites (p less than .02), indicating relative cortical inhibition by pressor responses. This effect occurred even though subjects reported tensing of muscles on increase trials (p less than .01), a behavioral activity previously associated with augmented rather than diminished cortical negativity. On increase trials slow potentials shifted toward positivity just prior to heart rate deceleration (the latter effect confirming activation of the baroreceptors).
T Elbert; L E Roberts; W Lutzenberger; N Birbaumer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Psychophysiology     Volume:  29     ISSN:  0048-5772     ISO Abbreviation:  Psychophysiology     Publication Date:  1992 Mar 
Date Detail:
Created Date:  1992-08-24     Completed Date:  1992-08-24     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0142657     Medline TA:  Psychophysiology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  154-64     Citation Subset:  IM    
Institut für Experimentelle Audiologie, University of Münster, Germany.
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MeSH Terms
Blood Pressure / physiology*
Cerebral Cortex / physiology*
Eye Movements / physiology
Heart Rate / physiology
Learning / physiology*
Pressoreceptors / physiology
Respiratory Mechanics / physiology

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

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