Monitoring brain activity of human subjects during delayed matching to sample tasks comparing verbal and pictorial stimuli with modal and cross-modal presentation: an event related potential study employing a source reconstruction method.
The time course of the event related potentials evoked within a delayed matching to sample task employing verbal and pictorial stimuli was analyzed with a source reconstruction method (minimum norm method). During signal stimulus presentation pictorial stimuli evoked more activity than verbal stimuli. Activity was particularly prominent in left frontal areas for the match of verbal-verbal stimulus pairs and over right posterior regions for the match of verbal-pictorial stimuli. Anticipation of the to-be-matched stimulus produced more pronounced activity for pictorial stimuli and generally stronger left and frontal activity. Results are discussed referring to a biological model of language processing.
Dobel
C
C
Department of Psychology, University of Konstanz, Germany. christian.dobel@uni-konstanz.de
Hauk
O
O
Zobel
E
E
Eulitz
C
C
Pulvermüller
F
F
Cohen
R
R
Schönle
P W
PW
Elbert
T
T
Rockstroh
B
B
D000328:Adult; D001037:Aphasia; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods; D004569:Electroencephalography / Q000379:methods; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008954:Models, Biological; D010775:Photic Stimulation / Q000379:methods*; D011930:Reaction Time / Q000502:physiology; D012057:Reinforcement, Verbal; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors