2607313 ECoG electrocorticography 2116 509343 ECochG electrocochleography 331 2607315 EcoG electrocochleography 9 3896066 EcohG electrocochleography 4 2607316 ecog Electrocochleography 3 3896067 ECohG electrocochleography 2 3892524 EchoG electrocochleography 2