The paper presents an original method of non-invasive registration of electroretinogram from both compound eyes of an
insect. The method demonstrated high reliability and repeatability of the results. Using this method, it was shown that
the magnitude of the light responses obtained from mutant cockroaches devoid of screening pigment, pearl, was about 4
times greater than those of wild-type insects. The time to peak of the response decreased with increasing light
intensity, both for shortwavelength and long-wavelength stimuli. The pearl cockroaches exhibited a faster time to peak
response than wild-type cockroaches; the results of covariance analysis indicate that these differences cannot be fully
explained by an increase in the number of photons reaching the photoreceptor membranes and suggest additional
differences in the compound eye physiology of mutant and wild-type insects. The positive voltage wave after the end of
light stimulation depends on light intensity and reflects hyperpolarization of receptor cells. The photovoltaic effect,
which distorts the amplitude and the shape of the response can be eliminated by using a gold wire as a recording
electrode.
Key words:
electroretinogram, cockroach, Periplaneta, compound eyes, insect vision
DOI: 10.31857/S0235009224010048
Cite:
Novikova E. S., Astakhova L. A., Rotov A. Yu., Zhukovskaya M. I.
Neinvazivnaya registratsiya elektroretinogrammy ot oboikh slozhnykh glaz u tarakana periplaneta americana l. v otvet na svetovye stimuly
[Non-invasive recording of electroretinogram from both compound eyes in the cockroach periplaneta americana l. in response to light stimuli].
Sensornye sistemy [Sensory systems].
2024.
V. 38(1).
P. 52–64 (in Russian). doi: 10.31857/S0235009224010048
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