title: Rhythmic variations in reaction times and evoked potentials.
abstract: The present work aimed to assess the existence of a regular ultradian cyclicity underlying the variations in amplitude of the N1-P2 component of acoustic EP during a relatively long recording session and investigate its relationship with behavioral measure as RT to the same stimulus. 128 tones were presented to each subject; 128 RTs and the associated EPs to target stimuli were recorded. N1-P2 amplitude has been measured at a single trial level through Woody adaptive filter modified by Wastell. Results showed that there are ultradian rhythmic variations of N1-P2 and RT, with a periodicity from about 5 to 40 min and these variations have similar patterns in the two measures in most of the subjects.
authors.affiliation: Dipartimento Di Psicologia, Universita di Palermo.
authors.forename: S
authors.initials: S
authors.lastname: Conte
authors.forename: F
authors.initials: F
authors.lastname: Ferlazzo
authors.forename: F
authors.initials: F
authors.lastname: D'Olimpio
mesh_terms: D000204:Activity Cycles / Q000502:physiology*; D000328:Adult; D001143:Arousal / Q000502:physiology; D004569:Electroencephalography; D004585:Electrooculography; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D006801:Humans; D011930:Reaction Time / Q000502:physiology*