ERPs in anterior and posterior regions associated with duration and size discriminations.
The main objective of the present study was to determine whether event-related potentials (ERPs) predominant in prefrontal cortex (PFC) respond in a similar fashion to ERPs predominant in posterior parietal cortex (PPC) in duration and size discrimination tasks. The results indicate that contingent negative variation (CNV) and P300 components changed according to task demands. In the time-related task, amplitudes and duration of both components increased as a function of stimulus duration and easier discriminability. This was not the case in the size discrimination task. These results are in accordance with the hypothesis of a functional link between PFC and PPC in timing behavior. The later-appearing LPCt component was observed in both tasks, but its amplitude increased only as a function of stimulus duration.
Gontier
Emilie
E
Faculte des Sciences, Laboratoire de Psychologie et Neurosciences de la Cognition et de l'Affectivite, Universite de Rouen, Mont-Saint-Aignan Rouen Cedex, France.
Paul
Isabelle
I
Le Dantec
Christophe
C
Pouthas
Viviane
V
Jean-Marie
Grouin
G
Bernard
Christian
C
Lalonde
Robert
R
Rebaï
Mohamed
M
D000328:Adult; D000704:Analysis of Variance; D001931:Brain Mapping; D003265:Contingent Negative Variation / Q000502:physiology*; D004192:Discrimination, Psychological / Q000502:physiology*; D004569:Electroencephalography / Q000379:methods; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D010775:Photic Stimulation / Q000379:methods; D017397:Prefrontal Cortex / Q000033:anatomy & histology / Q000502:physiology*; D012858:Size Perception / Q000502:physiology*; D013997:Time Factors; D013998:Time Perception / Q000502:physiology*; D055815:Young Adult