Artículos de revistas
Eeg Spike Source Localization Before And After Surgery For Temporal Lobe Epilepsy: A Bold Eeg-fmri And Independentcomponent Analysis Study
Registro en:
Brazilian Journal Of Medical And Biological Research. , v. 42, n. 6, p. 582 - 587, 2009.
0100879X
2-s2.0-68149163697
Autor
Sercheli M.S.
Bilevicius E.
Alessio A.
Ozelo H.
Pereira F.R.S.
Rondina J.M.
Cendes F.
Covolan R.J.M.
Institución
Resumen
Simultaneous measurements of EEG-functional magnetic resonance imaging (fMRI) combine the high temporal resolution of EEG with the distinctive spatial resolution of fMRI. The purpose of this EEG-fMRI study was to search for hemodynamic responses (blood oxygen level-dependent - BOLD responses) associated with interictal activity in a case of right mesial temporal lobe epilepsy before and after a successful selective amygdalohippocampectomy. Therefore, the study found the epileptogenic source by this noninvasive imaging technique and compared the results after removing the atrophied hippocampus. Additionally, the present study investigated the effectiveness of two different ways of localizing epileptiform spike sources, i.e., BOLD contrast and independent component analysis dipole model, by comparing their respective outcomes to the resected epileptogenic region. Our findings suggested a right hippocampus induction of the large interictal activity in the left hemisphere. Although almost a quarter of the dipoles were found near the right hippocampus region, dipole modeling resulted in a widespread distribution, making EEG analysis too weak to precisely determine by itself the source localization even by a sophisticated method of analysis such as independent component analysis. On the other hand, the combined EEG-fMRI technique made it possible to highlight the epileptogenic foci quite efficiently. 42 6 582 587 Engel Jr., J., Introduction to temporal lobe epilepsy (1996) Epilepsy Res, 26, pp. 141-150 Ives, J.R., Warach, S., Schmitt, F., Edelman, R.R., Schomer, D.L., Monitoring the patient's EEG during echo planar MRI (1993) Electroencephalogr Clin Neurophysiol, 87, pp. 417-420 Allen, P.J., Josephs, O., Turner, R., A method for removing imaging artifact from continuous EEG recorded during functional MRI (2000) Neuroimage, 12, pp. 230-239 Ritter, P., Villringer, A., Simultaneous EEG-fMRI (2006) Neurosci Biobehav Rev, 30, pp. 823-838 Zijlmans, M., Huiskamp, G., Hersevoort, M., Seppenwoolde, J.H., van Huffelen, A.C., Leijten, F.S., EEG-fMRI in the preoperative work-up for epilepsy surgery (2007) Brain, 130, pp. 2343-2353 Lemieux, L., Krakow, K., Fish, D.R., Comparison of spike-triggered functional MRI BOLD activation and EEG dipole model localization (2001) Neuroimage, 14, pp. 1097-1104 Bagshaw, A.P., Kobayashi, E., Dubeau, F., Pike, G.B., Gotman, J., Correspondence between EEG-fMRI and EEG dipole localisation of interictal discharges in focal epilepsy (2006) Neuroimage, 30, pp. 417-425 Belliveau, J.W., Rosen, B.R., Kantor, H.L., Rzedzian, R.R., Kennedy, D.N., McKinstry, R.C., Functional cerebral imaging by susceptibility-contrast NMR (1990) Magn Reson Med, 14, pp. 538-546 Ogawa, S., Lee, T.M., Kay, A.R., Tank, D.W., Brain magnetic resonance imaging with contrast dependent on blood oxygenation (1990) Proc Natl Acad Sci U S A, 87, pp. 9868-9872 Delorme, A., Makeig, S., EEGLAB: An open source toolbox for analysis of single-trial EEG dynamics including independent component analysis (2004) J Neurosci Methods, 134, pp. 9-21 Plummer, C., Harvey, A.S., Cook, M., EEG source localization in focal epilepsy: Where are we now? (2008) Epilepsia, 49, pp. 201-218 Leal, A.J., Dias, A.I., Vieira, J.P., Analysis of the EEG dynamics of epileptic activity in gelastic seizures using decomposition in independent components (2006) Clin Neurophysiol, 117, pp. 1595-1601 Kobayashi, E., Bagshaw, A.P., Benar, C.G., Aghakhani, Y., Andermann, F., Dubeau, F., Temporal and extratemporal BOLD responses to temporal lobe interictal spikes (2006) Epilepsia, 47, pp. 343-354 Mintzer, S., Cendes, F., Soss, J., Andermann, F., Engel Jr, J., Dubeau, F., Unilateral hippocampal sclerosis with contralateral temporal scalp ictal onset (2004) Epilepsia, 45, pp. 792-802