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A causal involvement of the left supramarginal gyrus during the retention of musical pitches.
Cortex ; 64: 310-7, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25577719
ABSTRACT
Brain stimulation studies have previously demonstrated a causal link between general pitch memory processes and activity within the left supramarginal gyrus (SMG). Building on this evidence, the present study tested the impact of left SMG stimulation on two distinct pitch memory phases, retention and encoding. Repetitive transcranial magnetic stimulation (rTMS) was employed during the retention stage (Experiment 1) and the encoding phase (Experiment 2) of a pitch recognition task. Stimulation was applied on a trial-by-trial basis over the left SMG (target site) or the vertex (control site). A block without TMS was also completed. In Experiment 1, rTMS over the left SMG during pitch retention led to significantly increased reaction times compared to control conditions. In Experiment 2 no rTMS modulation effects were found during encoding. Experiment 3 was conducted as a control for non-specific stimulation effects; no effects were found when rTMS was applied over the left SMG at the two different time points during a perceptual task. Taken together, these findings highlight a phase-specific involvement of the left SMG in the retention phase of pitch memory, thereby indicating that the left SMG is involved in the maintenance of pitch information.
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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Lobo Parietal / Nível de Percepção Sonora / Retenção Psicológica Limite: Adolescente / Adulto / Feminino / Humanos / Masculino / Jovem adulto Idioma: Inglês Revista: Cortex Ano de publicação: 2015 Tipo de documento: Artigo