Evolution of cerebral edema and its relationship with power in the theta band.
- Authors
- Fernández-Bouzas, A; Harmony, T; Marosi, E; Fernández, T; Silva, J; Rodríguez, M; Bernal, J; Reyes, A; Casián, G
- Year
- 1997
- Journal
- Electroencephalography and clinical neurophysiology
- PMID
- 9146487
- DOI
- 10.1016/s0013-4694(96)96049-6
In previous papers we have proposed that in patients with space-occupying lesions, delta power was related with the volume of the lesion and theta power with the volume of the edema. In this report we analyze the evolution of 10 patients with space-occupying lesions in whom we measured the volume of the lesion and of the edema before and after treatment that produced changes in these volumes. EEGs were recorded in the leads of the 10-20 system referenced to linked earlobes. Delta and theta powers were calculated for voltage and current source densities (CSD) and compared with age-norms to compute conventional Z-maps. These maps provide probability statements about the deviation of observed values from the norm. Rank correlations between the change in the volume of the lesion before and after treatment and the change in Z-values before and after treatment were significant only in the delta band. However, rank correlations between the change in the volume of the edema and the change in EEG Z-values were only significant in the theta band. These correlations were higher for CSD than for voltage estimates. We also observed that the site of the lesion and of the edema was better represented by CSD maps than by voltage maps. These results are also in agreement with our previous reports, in which we observed more precise localization of brain lesions by CSD than by voltage estimates.
No figures extracted from this document.
No chunks — full text not yet ingested.
No entities extracted from this document yet.
No uploaded files.
No citations found.
In this knowledge base
| Title | Year | PMID |
|---|---|---|
| The use of current source density as electrophysiological correlates in neuropsychiatric disorders: A review of human studies. | 2015 | 25448264 |
External
| Title | Authors | Journal | Year | Link |
|---|---|---|---|---|
| The focused quantitative EEG bio-marker in studying childhood atrophic encephalopathy. | Richard S et al. | — | 2022 | → |
| The use of current source density as electrophysiological correlates in neuropsychiatric disorders: A review of human studies. | Kamarajan C et al. | — | 2015 | → |
| Clinical implications of quantitative electroencephalography and current source density in patients with Alzheimer's disease. | Kim JS et al. | — | 2012 | → |
| Theta EEG source localization using LORETA in partial epilepsy patients with and without medication. | Clemens B et al. | — | 2010 | → |
| Treatment-related changes in functional connectivity in brain tumor patients: a magnetoencephalography study. | Douw L et al. | — | 2008 | → |
| Magnetoencephalographic analysis of cortical oscillatory activity in patients with brain tumors: Synthetic aperture magnetometry (SAM) functional imaging of delta band activity. | Oshino S et al. | — | 2007 | → |
| QEEG prognostic value in acute stroke. | Cuspineda E et al. | — | 2007 | → |
| Rhythmic brain activity at rest from rolandic areas in acute mono-hemispheric stroke: a magnetoencephalographic study. | Tecchio F et al. | — | 2005 | → |
| Variable resolution electromagnetic tomography (VARETA) in evaluation of compression of cerebral arteries due to deep midline brain lesions. | Fernández-Bouzas A et al. | — | 2004 | → |
| Neuronal plasticity in poststroke aphasia: insights by quantitative electroencephalography. | Mielke R et al. | — | 2003 | → |
| 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 | → |
| Long-term intra-individual variability of the background EEG in normals. | Kondacs A et al. | — | 1999 | → |
| Sources of abnormal EEG activity in the presence of brain lesions. | Fernández-Bouzas A et al. | — | 1999 | → |