Research progress on insect visual electrophysiological techniques
Insect visual electrophysiological techniques are important to study the electrical characteristics of photo-receptor cells and visual neurons in insects,including electroretinography(ERG)and microelectrode intracellular recording(MIR).ERG records the changes of voltage or electric current in the retina of insects in response to dif-ferent light stimuli,which occurs outside the cell.MIR records the changes in individual photoreceptor cells or visual neurons of an insect exposed to different lights,which occurs inside the cell.Insect visual electrophysiological tech-niques can explore the mechanism of electrophysiological response of insects'vision to light and reveal their sensi-tive light spectra and photoreceptor types.This review introduced the basic structure and the principle of ERG and MIR,and summarized their applications in insect researches in the past 20 years,which would provide references for elucidating the mechanism of light perception in insects and the use of insect phototropism to control pests.