Explicit processing of verbal and spatial features during letter-location binding modulates oscillatory activity of a fronto-parietal network.

Poch, Claudia; Campo, Pablo; Parmentier, Fabrice B.R.; Ruiz Vargas, Jose Maria; Elsley, Jane V.; Perales Castellanos, Nazareth; Maestú, Fernando y Pozo Guerrero, Francisco del (2010). Explicit processing of verbal and spatial features during letter-location binding modulates oscillatory activity of a fronto-parietal network.. "Neuropsychologia", v. 48 (n. 13); pp. 3846-3854. ISSN 0028-3932. https://doi.org/10.1016/j.neuropsychologia.2010.09.01.

Descripción

Título: Explicit processing of verbal and spatial features during letter-location binding modulates oscillatory activity of a fronto-parietal network.
Autor/es:
  • Poch, Claudia
  • Campo, Pablo
  • Parmentier, Fabrice B.R.
  • Ruiz Vargas, Jose Maria
  • Elsley, Jane V.
  • Perales Castellanos, Nazareth
  • Maestú, Fernando
  • Pozo Guerrero, Francisco del
Tipo de Documento: Artículo
Título de Revista/Publicación: Neuropsychologia
Fecha: Noviembre 2010
Volumen: 48
Materias:
Palabras Clave Informales: Binding; Working memory; Episodic buffer; Oscillatory activity; Prefrontal cortex; Magnetoencephalography
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Tecnología Fotónica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The present study investigated the binding of verbal and spatial features in immediate memory. In a recent study, we demonstrated incidental and asymmetrical letter-location binding effects when participants attended to letter features (but not when they attended to location features) that were associated with greater oscillatory activity over prefrontal and posterior regions during the retention period. We were interested to investigate whether the patterns of brain activity associated with the incidental binding of letters and locations observed when only the verbal feature is attended differ from those reflecting the binding resulting from the controlled/explicit processing of both verbal and spatial features. To achieve this, neural activity was recorded using magnetoencephalography (MEG) while participants performed two working memory tasks. Both tasks were identical in terms of their perceptual characteristics and only differed with respect to the task instructions. One of the tasks required participants to process both letters and locations. In the other, participants were instructed to memorize only the letters, regardless of their location. Time–frequency representation of MEG data based on the wavelet transform of the signals was calculated on a single trial basis during the maintenance period of both tasks. Critically, despite equivalent behavioural binding effects in both tasks, single and dual feature encoding relied on different neuroanatomical and neural oscillatory correlates. We propose that enhanced activation of an anterior–posterior dorsal network observed in the task requiring the processing of both features reflects the necessity for allocating greater resources to intentionally process verbal and spatial features in this task.

Más información

ID de Registro: 8594
Identificador DC: http://oa.upm.es/8594/
Identificador OAI: oai:oa.upm.es:8594
Identificador DOI: 10.1016/j.neuropsychologia.2010.09.01
URL Oficial: http://www.sciencedirect.com/science/journal/00283932
Depositado por: Memoria Investigacion
Depositado el: 10 Ago 2011 08:29
Ultima Modificación: 27 Abr 2016 11:13
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