abnormal neurophysiology FBcv:0000434 Phenotype that is any abnormality in the electrophysiological properties of some class of neurons, muscles or other anatomical structure of the nervous system. Examples of these phenotypes at the neuron class level include defects in spontaneous or evoked excitatory junction potential. Examples at a more gross anatomical level include abnormal retinal electrophysiology (e.g.- measured by an electroretinogram). phenotypic_class neurophysiology defective phenotype