Brain rhythms alterations and their effect in functional networks: A simultaneous EEG/fMRI study in Fixation-off epilepsy

Solana Sánchez, Ana Beatriz; Hernández Tamames, J.A.; Molina, Elena; Martínez, Kenia; Alcalá, Juan José; Toledano, Rafael; San Antonio-Arce, Victoria; Garcia Morales, Irene; Gil Nagel, Antonio; Maestu Unturbe, Ceferino; Alvarez Linera, Juan; Alfayate, E. y Pozo Guerrero, Francisco del (2012). Brain rhythms alterations and their effect in functional networks: A simultaneous EEG/fMRI study in Fixation-off epilepsy. En: "ISMRM 20th Annual Meeting & Exhibition - Proc. Intl. Soc. Mag. Reson. Med. 20", 05/05/2012 - 11/05/2012, Melbourne (Australia). p. 370.

Descripción

Título: Brain rhythms alterations and their effect in functional networks: A simultaneous EEG/fMRI study in Fixation-off epilepsy
Autor/es:
  • Solana Sánchez, Ana Beatriz
  • Hernández Tamames, J.A.
  • Molina, Elena
  • Martínez, Kenia
  • Alcalá, Juan José
  • Toledano, Rafael
  • San Antonio-Arce, Victoria
  • Garcia Morales, Irene
  • Gil Nagel, Antonio
  • Maestu Unturbe, Ceferino
  • Alvarez Linera, Juan
  • Alfayate, E.
  • Pozo Guerrero, Francisco del
Tipo de Documento: Ponencia en Congreso o Jornada (Póster)
Título del Evento: ISMRM 20th Annual Meeting & Exhibition - Proc. Intl. Soc. Mag. Reson. Med. 20
Fechas del Evento: 05/05/2012 - 11/05/2012
Lugar del Evento: Melbourne (Australia)
Título del Libro: ISMRM 20th Annual Meeting & Exhibition - Proc. Intl. Soc. Mag. Reson. Med. 20
Fecha: 2012
Materias:
Escuela: Centro de Tecnología Biomédica (CTB) (UPM)
Departamento: Otro
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Fixation-off sensitivity (FOS) denotes the forms of EEG abnormalities, which are elicited by elimination of central vision or fixation. The phenomenon seems to depend on variables that modulate the alpha rhythm, however, the cerebral mechanisms underlying FOS remain unclear [1]. The scarce previous fMRI findings related to FOS have shown activation in extrastriate cortex [2] and also in frontal areas [3][4]. On the other hand, simultaneous EEG-fMRI technique has been used to assess the relationship between spontaneous power fluctuations of electrical rhythms and associated fMRI signal modulations. These studies have identified that lateral frontoparietal networks show a negative correlation with alpha band in healthy subjects. This neuroanatomical pattern is related to attentional processes and cognitive resources. Moreover, a sub-beta band (17-23 Hz) has been identified with posterior cingulate, temporoparietal junction and dorso-medial prefrontal cortex activations, which correspond to the DMN [5][6].

Más información

ID de Registro: 19170
Identificador DC: http://oa.upm.es/19170/
Identificador OAI: oai:oa.upm.es:19170
URL Oficial: http://www.ismrm.org/12/
Depositado por: Memoria Investigacion
Depositado el: 23 Sep 2013 15:36
Ultima Modificación: 22 Sep 2014 11:15
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