Document Detail

Description of an EEG pattern evoked in central--parietal areas by the Hathayogic exercise Agnisara.
MedLine Citation:
PMID:  6229969     Owner:  NLM     Status:  MEDLINE    
Agnisara is a Hathayogic exercise consisting essentially in alternate, forceful retractions and protrusions of the abdominal wall, performed along a 20-30 s period of apnoea. In the course of series of Agnisars spindle bursts of a "wicket" EEG wave pattern developed over the para-Rolandic areas of the cerebral cortex, at frequencies around 12-13 Hz, with waxing and waning amplitudes in the range of 50 to 100 microV. These spindle-bursts, which occurred preferably during the phase of retraction of the abdominal wall, were named "Xi" rhythm (after the Greek letter X). It is the same as the one that regularly accompanies the performance on various other Hathayogic exercises. Xi spindles were recorded in linked earlobe reference derivations from areas located bilaterally midway between F-C, C-P, and P-O standard electrode positions of the 10-20 system. This EEG pattern would be considered as the expression of the central excitation, produced by the exercise's long-lasting and repeated stimulation of visceral, and somatic receptors. Thus, this activation affects mainly cortical structures with somato-visceral representation.
E Roldán; C Dostálek
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Activitas nervosa superior     Volume:  25     ISSN:  0001-7604     ISO Abbreviation:  Act Nerv Super (Praha)     Publication Date:  1983 Dec 
Date Detail:
Created Date:  1984-03-22     Completed Date:  1984-03-22     Revised Date:  2007-09-06    
Medline Journal Info:
Nlm Unique ID:  0400662     Medline TA:  Act Nerv Super (Praha)     Country:  CZECHOSLOVAKIA    
Other Details:
Languages:  eng     Pagination:  241-6     Citation Subset:  IM    
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MeSH Terms
Abdominal Muscles / innervation,  physiology*
Evoked Potentials
Muscle Contraction
Parietal Lobe / physiology*

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