Location of the imagined speech mapping from cortex to the scalp using the MEG and the EEG

Abstract

People suffer from different brain disorders, unable to speak though they can think. For them require, a system which easily wearable and converts their imagined or intended covert speech into overt speech. Each brainactivity generates an electrical and magnetic signal. The electrical signal due to the brain activity is called the EEG, andthemagneticmovementiscalledtheMEG.Bothsignalsaremappedonthescalp, butitisweakerthanthebraincortex,andtheeffectofvolumeconduction.Therefore, it is essential to map the scalp's exact location of imagined speech to reduce the required number of electrodes and complexity. In this explorer, self-made graphene- based electrode and Hall-effect principle-based optically pumped magnetic electrode Resultsareadequatetolocatetheareaonthescalpofimaginedspeechandincrease the system wearables and user comfortability than the preceding system