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Functional Architecture of Verbal and Tonal Working Memory: An fMRI Study
| Citations: | 38 - 6 self |
BibTeX
@MISC{Koelsch_functionalarchitecture,
author = {Stefan Koelsch and Katrin Schulze and Daniela Sammler and Thomas Fritz and Karsten Müller and Oliver Gruber},
title = {Functional Architecture of Verbal and Tonal Working Memory: An fMRI Study},
year = {}
}
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Abstract
Abstract: This study investigates the functional architecture of working memory (WM) for verbal and tonal information during rehearsal and articulatory suppression. Participants were presented with strings of four sung syllables with the task to remember either the pitches (tonal information) or the syllables (verbal information). Rehearsal of verbal, as well as of tonal information activated a network comprising ventrolateral premotor cortex (encroaching Broca’s area), dorsal premotor cortex, the planum temporale, inferior parietal lobe, the anterior insula, subcortical structures (basal ganglia and thalamus), as well as the cerebellum. The topography of activations was virtually identical for the rehearsal of syllables and pitches, showing a remarkable overlap of the WM components for the rehearsal of verbal and tonal information. When the WM task was performed under articulatory suppression, activations in those areas decreased, while additional activations arose in anterior prefrontal areas. These prefrontal areas might contain additional storage components of verbal and tonal WM that are activated when auditory information cannot be rehearsed. As in the rehearsal conditions, the topography of activations under articulatory suppression was nearly identical for the verbal as compared to the tonal task. Results indicate that both the rehearsal of verbal and tonal information, as well as storage of verbal and tonal information relies on strongly overlapping neuronal networks. These networks appear to partly consist of sensorimotor-related circuits which provide resources for the representation and maintenance of information, and which are remarkably similar for the production of speech and song.
Keyphrases
tonal information functional architecture articulatory suppression tonal working memory fmri study ventrolateral premotor cortex inferior parietal lobe additional activation prefrontal area planum temporale rehearsal condition auditory information cannot anterior insula tonal information relies neuronal network remarkable overlap sensorimotor-related circuit tonal wm anterior prefrontal area broca area dorsal premotor cortex wm component subcortical structure verbal information basal ganglion additional storage component wm task tonal task sung syllable
