To investigate the possible influence of stimulation of the immune system on cognitive tasks, healthy volunteers were vaccinated against hepatitis B and tested over a six months period in a simple reaction times and the Stroop task. In general, the “Stroop effect” demonstrates that both the name and meaning of a word are automatically processed even when voluntary attention is trying hard not to process them. Unlike Placebo group, Vaccinated subjects showed a persistent lack of the classical Stroop effect. These findings may be explained by a constraint satisfaction model of the Stroop task, assuming a selective weakening of the connection matrix, and suggest that immune-cognitive effects may occur, besides the well known cognitive-immune influences like those elicited by emotional stress.

Long-term effects of vaccination on attentional performance

NICOLETTI, ROBERTO;BRIGHETTI, GIANNI;FRANCESCHI, CLAUDIO
2004

Abstract

To investigate the possible influence of stimulation of the immune system on cognitive tasks, healthy volunteers were vaccinated against hepatitis B and tested over a six months period in a simple reaction times and the Stroop task. In general, the “Stroop effect” demonstrates that both the name and meaning of a word are automatically processed even when voluntary attention is trying hard not to process them. Unlike Placebo group, Vaccinated subjects showed a persistent lack of the classical Stroop effect. These findings may be explained by a constraint satisfaction model of the Stroop task, assuming a selective weakening of the connection matrix, and suggest that immune-cognitive effects may occur, besides the well known cognitive-immune influences like those elicited by emotional stress.
R. NICOLETTI; C.A. PORRO; G. BRIGHETTI; D. MONTI; G. PAGNONI; M. GUIDO; S. RUBICHI; C. FRANCESCHI
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/2061
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