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Year : 2003  |  Volume : 51  |  Issue : 2  |  Page : 235--236

Relevance of computerized electroencephalographic topography (Brain Mapping) in ischemic stroke

Department of Neurology, St. John’s Medical College and Hospital, Bangalore - 560 034, India

Correspondence Address:
L Pinheiro
Department of Neurology, St. John’s Medical College and Hospital, Bangalore - 560 034
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Source of Support: None, Conflict of Interest: None

PMID: 14571011

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Background and Aims: Computerized electroencephalographic topography (CET) (brain mapping) is a non-invasive, spatially oriented procedure for depicting amplitude and frequency patterns by two-dimensional color-coded frequency and amplitude display of the electroencephalograph (EEG). Material and Methods: We prospectively studied the relationship between CT scan lesions, conventional EEG and brain mapping in 40 patients with ischemic stroke within 1 week of onset. EEG and brain mapping was done within 24 hours of doing CT scan. Results: There were 32 males and 8 females and the mean age was 56 years (range 27-75 years). CET/EEG was normal in 2 patients with capsular infarct. Brain mapping showed abnormalities (most commonly low-frequency high-amplitude changes) in 95% of patients, whereas EEG abnormalities were seen in only 40%. Brain mapping abnormalities were appropriate to the side of the CT scan lesion in 20 (52.63%) patients and were present bilaterally n 18 (47.37%) patients. Brain mapping abnormalities were ipsilateral to the side of the CT lesion when the lesion was < 2 cm in diameter and they were bi-hemispherical when the CT lesion was > 2 cm in diameter. Conclusions: There was no correlation between motor deficits and brain map abnormalities.


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Online since 20th March '04
Published by Wolters Kluwer - Medknow