| |
Abstract:
Abstract: Countless studies have employed neuroimaging
techniques to study brain activity during the encoding and
retrieval of memory. Yet few have focused on the spatio-temporal
pattern of brain activation during memory processes. The present
study used electroencephalography (EEG) to study memory
event-related potentials with respect to visual scenes. EEGs of 15
healthy college students were recorded with 64 scalp electrodes.
Subjects differentiated between indoor and outdoor scenes during
the encoding phase of the memory task. After a ten-minute
distractor period, they identified old and new pictures during the
recognition phase. To single out potentials caused by neural
activity, many EEG trials were averaged in order to cancel the
effects of random noise of each individual trial. We found that
during encoding, the amplitude of the late positive event-related
potential (ERP) was larger for subsequently remembered pictures
than for forgotten pictures. Regions of activation suggest the
involvement of the frontal and medial temporal lobe in determining
subsequent memory of stimuli.
|
