Comparison of Electroencephalography Power Spectral Density between Duramater and Brain Cortex
Ahmad Faried *
Department of Neurosurgery, Faculty of Medicine, Universitas Padjadjaran−Dr. Hasan Sadikin Hospital, Bandung, Indonesia
Misuari Sabirin
Department of Biomedical Engineering, Bandung Institute of Technology, Bandung, Indonesia
Agung B. Sutiono
Department of Neurosurgery, Faculty of Medicine, Universitas Padjadjaran−Dr. Hasan Sadikin Hospital, Bandung, Indonesia
Muhammad Z. Arifin
Department of Neurosurgery, Faculty of Medicine, Universitas Padjadjaran−Dr. Hasan Sadikin Hospital, Bandung, Indonesia
Richard Mengko
Department of Biomedical Engineering, Bandung Institute of Technology, Bandung, Indonesia
Tati L. E. Rajab
Department of Biomedical Engineering, Bandung Institute of Technology, Bandung, Indonesia
*Author to whom correspondence should be addressed.
Abstract
The intracranial electroencephalo- graphy (EEG) or electrocorticography (ECoG) is an invasive type of EEG which its electrodes are placed on the brain surface. It might be increases the amplitude of a recorded brain signal compared with the common EEG due to an impedance reduction. This study tries to analyze the difference by comparing the Power Spectral Density (PSD) of brain signals between duramater and brain cortex. The result shows that there is a distinction between the two sites, where the EEG recorded from brain cortex has a higher PSD than from duramater.
Keywords: Electroencephalograph (EEG), intra operative EEG, fast fourier transform (FFT), power spectral