| |
Abstract:
We employed LORETA source imaging of dense-array ERP
recordings co-registered to structural MRI to test the hypothesis
that the retrieval from memory of associated and fused pairs of
concepts relies on different brain areas. This was done by
examining associative recognition following a
conceptual-combination encoding task in which subjects task was to
try to fuse a sequentially presented pair of words into a single
concept (e.g., as in a compound noun). Success or failure of fusion
for each pair was indicated by button-press. The memory test was
for temporal order of pair items in a which half of the test pairs
were in the reverse order compared to the encoding phase. The
difference between same- and reverse-order pairs was localized
separately for fused and juxtaposed pairs. Results show different
patterns of reaction times, ERP topographies, and localized brain
sources for the same/reverse-order effect for retrieval of fused
and juxtaposed pairs.
|
