Title: Latency of modality-specific reactivation of auditory and
visual information during episodic memory retrieval

Journal(書誌情報): NeuroReport, 26(6), 303-308



Abstract: This study used magnetoencephalography (MEG) to examine the
latency of modality-specific reactivation in the visual and auditory
cortices during a recognition task to determine the effects of
reactivation on episodic memory retrieval. Nine right-handed healthy
young adults participated in the experiment. The experiment consisted
of a word-encoding phase and two recognition phases. Three encoding
conditions were included: encoding words alone (word-only) and
encoding words presented with either related pictures (visual) or
related sounds (auditory). The recognition task was conducted in the
MEG scanner 15?min after the completion of the encoding phase. After
the recognition test, a source-recognition task was given, in which
participants were required to choose whether each recognition word was
not presented or was presented with which information during the
encoding phase. Word recognition in the auditory condition was higher
than that in the word-only condition. Confidence-of-recognition scores
(d′) and the source-recognition test showed superior performance in
both the visual and the auditory conditions compared with the
word-only condition. An equivalent current dipoles analysis of MEG
data indicated that higher equivalent current dipole amplitudes in the
right fusiform gyrus occurred during the visual condition and in the
superior temporal auditory cortices during the auditory condition,
both 450?550?ms after onset of the recognition stimuli. Results
suggest that reactivation of visual and auditory brain regions during
recognition binds language with modality-specific information and that
reactivation enhances confidence in one’s recognition performance.

著者Contact先の email: d-ueno[at]