Comparison of Z and multivariate statistical brain electromagnetic maps for the localization of brain lesions.
- Authors
- Fernández-Bouzas, A; Harmony, T; Galán, L; Marosi, E; Fernández, T; Reyes, A; Silva, J; Rodríguez, M; Bernal, J; Alonso, M
- Year
- 1995
- Journal
- Electroencephalography and clinical neurophysiology
- PMID
- 7489666
- DOI
- 10.1016/0013-4694(95)00111-b
Conventional Z maps provide probability statements about the deviation of observed values from the norm. Galán et al. (1994) introduced Simultaneous Significance Probability Scales to detect abnormalities over the whole map, making use of the information provided by the topographic structure of dependencies. They also described multivariate brain electromagnetic (MBE) maps for compact presentation of complex spatio-temporal information. In this paper, using the distance-based localization receiver operating characteristic curves (DL-ROC curves), we compare the localization provided by computed tomography with that provided by Z and MBE maps in 61 patients with brain lesions. Maps were calculated for absolute power and relative power in delta, theta, alpha and beta bands for voltage and current source densities (CSD). In each patient, all maps were compared and the map with the highest value of the area of the DL-ROC curve was considered to be the "best map." Z maps of CSD were the "best maps" in 24 patients. In the voltage montage, we observed that multivariate maps add some information not contained in the Z maps. However, for CSD, Z maps were more accurate than multivariate maps. A very consistent finding was the observation that lesions were better detected by maps analyzing the delta band, while edema was better represented by maps in the theta range.
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External
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| Resting State Healthy EEG: The First Wave of the Cuban Normative Database. | Bosch-Bayard J et al. | — | 2020 | → |
| The use of current source density as electrophysiological correlates in neuropsychiatric disorders: A review of human studies. | Kamarajan C et al. | — | 2015 | → |
| 3D statistical parametric mapping of quiet sleep EEG in the first year of life. | Bosch-Bayard J et al. | — | 2012 | → |
| Analysis of background EEG activity in patients with juvenile myoclonic epilepsy. | Santiago-Rodríguez E et al. | — | 2008 | → |
| Sources of abnormal EEG activity in spontaneous intracerebral hemorrhage. | Fernández-Bouzas A et al. | — | 2002 | → |
| Sources of abnormal EEG activity in brain infarctions. | Fernández-Bouzas A et al. | — | 2000 | → |
| Sources of abnormal EEG activity in the presence of brain lesions. | Fernández-Bouzas A et al. | — | 1999 | → |
| Evolution of cerebral edema and its relationship with power in the theta band. | Fernández-Bouzas A et al. | — | 1997 | → |