Minor and Unsystematic Cortical Topographic Changes of Attention Correlates between Modalities

Autor(es):Mostrar menos -

Basile, Luis F. H. ^{[1, 2]} ; Lozano, Mirna D. ^[2] ; Alvarenga, Milkes Y. ^{[1, 3]} ; Pereira, Jr., Jose F. ^[1] ; Machado, Sergio ^[4] ; Velasques, Bruna ^[4] ; Ribeiro, Pedro ^[4] ; Piedade, Roberto ^[4] ; Anghinah, Renato ^[5] ; Knyazev, Gennady ^[6] ; Ramos, Renato T. ^{[7, 2]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Med, Div Neurosurg, Sao Paulo - Brazil

^[2] Univ Metodista Sao Paulo, Fac Saude, Psychophysiol Lab, Sao Paulo - Brazil

^[3] Univ Sao Judas Tadeu, Sao Paulo - Brazil

^[4] Univ Fed Rio de Janeiro, Dept Psychiat, Rio De Janeiro - Brazil

^[5] Univ Sao Paulo, Sch Med, Dept Neurol, Sao Paulo - Brazil

^[6] Russian Acad Med Sci, Inst Physiol, Siberian Branch, Novosibirsk - Russia

^[7] Univ Sao Paulo, Sch Med, Dept Psychiat, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PLoS One; v. 5, n. 12, p. e15022, 2010.
• Citações Web of Science: 7

Resumo

In this study we analyzed the topography of induced cortical oscillations in 20 healthy individuals performing simple attention tasks. We were interested in qualitatively replicating our recent findings on the localization of attention-induced beta bands during a visual task [1], and verifying whether significant topographic changes would follow the change of attention to the auditory modality. We computed corrected latency averaging of each induced frequency bands, and modeled their generators by current density reconstruction with Lp-norm minimization. We quantified topographic similarity between conditions by an analysis of correlations, whereas the inter-modality significant differences in attention correlates were illustrated in each individual case. We replicated the qualitative result of highly idiosyncratic topography of attention-related activity to individuals, manifested both in the beta bands, and previously studied slow potential distributions [2]. Visual inspection of both scalp potentials and distribution of cortical currents showed minor changes in attention-related bands with respect to modality, as compared to the theta and delta bands, known to be major contributors to the sensory-related potentials. Quantitative results agreed with visual inspection, supporting to the conclusion that attention-related activity does not change much between modalities, and whatever individual changes do occur, they are not systematic in cortical localization across subjects. We discuss our results, combined with results from other studies that present individual data, with respect to the function of cortical association areas. (AU)

• Processo FAPESP: 07/50390-9 - Sistematica da topografia das perturbacoes evento-relacionadas.
• Beneficiário: Luis Fernando Hindi Basile
• Modalidade de apoio: Auxílio à Pesquisa - Regular