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

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

Description

Title: Brain rhythms alterations and their effect in functional networks: A simultaneous EEG/fMRI study in Fixation-off epilepsy
Author/s:
  • 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
Item Type: Presentation at Congress or Conference (Poster)
Event Title: ISMRM 20th Annual Meeting & Exhibition - Proc. Intl. Soc. Mag. Reson. Med. 20
Event Dates: 05/05/2012 - 11/05/2012
Event Location: Melbourne (Australia)
Title of Book: ISMRM 20th Annual Meeting & Exhibition - Proc. Intl. Soc. Mag. Reson. Med. 20
Date: 2012
Subjects:
Faculty: Centro de Tecnología Biomédica (CTB) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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].

More information

Item ID: 19170
DC Identifier: http://oa.upm.es/19170/
OAI Identifier: oai:oa.upm.es:19170
Official URL: http://www.ismrm.org/12/
Deposited by: Memoria Investigacion
Deposited on: 23 Sep 2013 15:36
Last Modified: 22 Sep 2014 11:15
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