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Acute effects of ayahuasca on neuropsychological performance - experienced vs occasional users Options
 
Vodsel
#1 Posted : 8/7/2013 12:31:19 AM

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Source: ICEERS via Scoop.it
Publication Date: August 6, 2013

This study about ayahuasca of ICEERS' scientific director José Carlos Bouso PhD was conducted by the Human Experimental Neuropsychopharmacology department, in the Sant Pau Institute of Biomedical Research (IIB-Sant Pau, Barcelona), and was presented by the lead author in the recent Breaking Convention in London. The new research paper is available in PubMed here.

Abstract from Epub ahead of print:

Quote:
OBJECTIVES:
Here, we wished to investigate the effects of acute ayahuasca intake on neuropsychological performance, specifically on working memory and executive function.

METHODS:
Twenty-four ayahuasca users (11 long-term experienced users and 13 occasional users) were assessed in their habitual setting using the Stroop, Sternberg, and Tower of London tasks prior to and following ayahuasca intake.

RESULTS:
Errors in the Sternberg task increased, whereas reaction times in the Stroop task decreased and accuracy was maintained for the whole sample following ayahuasca intake. Interestingly, results in the Tower of London showed significantly increased execution and resolution times and number of movements for the occasional but not the experienced users. Additionally, a correlation analysis including all subjects showed that impaired performance in the Tower of London was inversely correlated with lifetime ayahuasca use.

CONCLUSIONS:
Acute ayahuasca administration impaired working memory but decreased stimulus-response interference. Interestingly, detrimental effects on higher cognition were only observed in the less experienced group. Rather than leading to increased impairment, greater prior exposure to ayahuasca was associated with reduced incapacitation. Compensatory or neuromodulatory effects associated with long-term ayahuasca intake could underlie preserved executive function in experienced users.
 

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