Abnormal EEG - [electroencephalogram]Abnormal EMG - [electromyogram]Abnormal EOG - [electro-oculogram]Abnormal ERG - [electroretinogram]Abnormal VEP - [visual evoked potential]Abnormal brain function studiesAbnormal caloric testAbnormal echoencephalogramAbnormal response to nerve stimulationAbnormal results of function studies of central nervous systemAbnormal results of function studies of peripheral nervous system or special sensesResults of function studies of the nervous systemabnormal central nervous system function studiesabnormal peripheral nervous system function studiesabnormal special senses function studies