Authors
Bradley R Buchsbaum, Rosanna K Olsen, Paul Koch, Karen Faith Berman
Publication date
2005/11/23
Journal
Neuron
Volume
48
Issue
4
Pages
687-697
Publisher
Elsevier
Description
To hear a sequence of words and repeat them requires sensory-motor processing and something more—temporary storage. We investigated neural mechanisms of verbal memory by using fMRI and a task designed to tease apart perceptually based ("echoic") memory from phonological-articulatory memory. Sets of two- or three-word pairs were presented bimodally, followed by a cue indicating from which modality (auditory or visual) items were to be retrieved and rehearsed over a delay. Although delay-period activation in the planum temporale (PT) was insensible to the source modality and showed sustained delay-period activity, the superior temporal gyrus (STG) activated more vigorously when the retrieved items had arrived to the auditory modality and showed transient delay-period activity. Functional connectivity analysis revealed two topographically distinct fronto-temporal circuits, with STG coactivating more …
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Scholar articles
BR Buchsbaum, RK Olsen, P Koch, KF Berman - Neuron, 2005