TY - JOUR
T1 - Phasic alertness in a cued double-choice reaction time task
T2 - A Contingent Negative Variation (CNV) study
AU - Pauletti, Caterina
AU - Mannarelli, Daniela
AU - Grippo, Antonello
AU - Currà, Antonio
AU - Locuratolo, Nicoletta
AU - De Lucia, Maria C.
AU - Fattapposta, Francesco
PY - 2014/10/3
Y1 - 2014/10/3
N2 - A phasic change in alertness is produced every time that a warning stimulus precedes a target, and it enhances and maintains the response readiness to an impending stimulus. In the present study, we investigated the Contingent Negative Variation (CNV) phenomenon, as index of phasic alertness, during a S1-S2 paradigm in which the imperative stimulus was represented by a double-choice reaction time task, designed to increase the executive requests at S2. Subjects performed the task at three consecutive time points in order to explore the CNV activity over time. The repetition of a cued double-choice reaction time task reduced the reaction times (RTs), while CNV amplitude remained steady along the sessions. Our data suggest that the continuous recruitment of attentional resources does not undergo habituation when it is related to the brain activity required in the maintenance of working memory when the mental model of the stimulus environment is updated.
AB - A phasic change in alertness is produced every time that a warning stimulus precedes a target, and it enhances and maintains the response readiness to an impending stimulus. In the present study, we investigated the Contingent Negative Variation (CNV) phenomenon, as index of phasic alertness, during a S1-S2 paradigm in which the imperative stimulus was represented by a double-choice reaction time task, designed to increase the executive requests at S2. Subjects performed the task at three consecutive time points in order to explore the CNV activity over time. The repetition of a cued double-choice reaction time task reduced the reaction times (RTs), while CNV amplitude remained steady along the sessions. Our data suggest that the continuous recruitment of attentional resources does not undergo habituation when it is related to the brain activity required in the maintenance of working memory when the mental model of the stimulus environment is updated.
KW - Alertness
KW - CNV
KW - ERPs
KW - Reaction time
UR - http://www.scopus.com/inward/record.url?scp=84906708444&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84906708444&partnerID=8YFLogxK
U2 - 10.1016/j.neulet.2014.07.059
DO - 10.1016/j.neulet.2014.07.059
M3 - Article
C2 - 25116758
AN - SCOPUS:84906708444
SN - 0304-3940
VL - 581
SP - 7
EP - 13
JO - Neuroscience Letters
JF - Neuroscience Letters
ER -