Functional localization of the cortical motor area in the brain Electrocorticogram analysis

The method for rapidly precisely and non invasively localizing functional regions of the brain is a problem in neuromedicine research Cortical electrostimulation is the optimal localization method during brain surgery with a degree of accuracy of approximately 5 mm However electrostimulation can damage the cerebral cortex trigger epilepsy and extend the operation time Studies are required to determine whether cortical motor regions can be localized by wavelet analysis from electrocorticograms In this study based on wavelet analysis of electrocorticograms a selection of algorithms for classification of the mu rhythm in the motor regions utilizing experimental data was verified Results demonstrated that a characteristic quantity of energy ratio in the reconstructed signal was filtered in the d6 (781-15 62 Hz) band prior to and following motion events A characteristic threshold was considered to be 40% The accuracy of localization detection was 93% The degree of accuracy was less than 5 mm The present study avoided the problems of cerebral cortex injury and epilepsy onset with an operation time of 60 seconds Therefore wavelet analysis on electrocorticogram is feasible for localizing cortical motor regions Furthermore this localization technique is accurate safe and rapid