Premium
Interhemispheric transfer of spatial and semantic information: Electrophysiological evidence
Author(s) -
Dal Molin Anna,
Marzi Carlo Alberto,
Banich Marie T.,
Girelli Massimo
Publication year - 2013
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/psyp.12025
Subject(s) - psychology , electrophysiology , cognitive psychology , neuroscience , communication
The goal of this study was to cast light on the existence of functional callosal channels for the interhemispheric transfer ( IHT ) of spatial and semantic information. To do so, we recorded event‐related potentials in healthy humans while performing a primed odd‐even discrimination task. Targets were visually presented numbers preceded by single‐letter primes signaling the probable presentation of an odd or an even number. Primes and targets could appear either in the same or in different visual fields, thus requiring an IHT in the latter case. The P 1 and N 2 components were influenced by IHT of spatial information only, whereas the later N 400 was influenced by IHT of both spatial and semantic information. This was not the case for the P 3b, which was modulated by semantic validity only. These results provide novel evidence of the existence of a temporally separated interhemispheric exchange of spatial and semantic information.