Frolov R
We mainly study information processing at the visual system peripheries, specific mechanisms of visual signal transfer and transformation, their physiological adaptations and evolution linked to visual ecology. Since at the levels of receptors, neurons and neuron networks no principal differences exist between dissimilar Metazoan species, we use insects as convenient model organisms to investigate common mechanisms of signal processing. Our research methods include electrophysiology, microscopy, gene expression silencing, behavioral experiments and mathematical modeling.
Articles
Frolov R / Analysis of inductance-like effects of delayed rectifiers: amplification of voltage response onset, acceleration of decay, and voltage- and kinetics-dependent limitations / J Comp Physiol A 2025 211(22 October 2025) : 589-601
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Frolov R / Non-inactivating voltage-activated K+ conductances can increase photoreceptor signaling bandwidth beyond the bandwidth set by phototransduction / Plos one. 2023 18(8) : e0289466
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Ignatova I, Miinalainen I, Frolov R / Morphological and electrophysiological adaptations of photoreceptors in the love spot of hover fly Volucella pellucens / Vis Neurosci 2021 Oct 12; 38 : E015
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Ignatova I, Saari P, Frolov R / Latency of phototransduction limits transfer of higher-frequency signals in cockroach photoreceptors / J Neurophysiol 2020 123 : 120-133
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Frolov R, Ignatova I / Electrophysiological adaptations of insect photoreceptors and their elementary responses to diurnal and nocturnal life styles / J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2020 206 : 55-69
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Ignatova I, French A, Torkkeli P, Liu H, Frolov R / Suppression of Gq and PLC gene expression has a small effect on quantum bumps in vivo in Periplaneta americana / J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2020 206 : 597-610
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Frolov R, Ignatova I / Speed of phototransduction in the microvillus regulates the accuracy and bandwidth of the rhabdomeric photoreceptor / PLoS Comp. Biol. 2020 16(11) : e1008427
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Frolov R / The sources of electrophysiological variability in the retina of Periplaneta americana / Vis Neurosci 2019 36 : E003
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Ignatova I, French A, Frolov R / Effects of phase correlations in naturalistic stimuli on quantitative information coding by fly photoreceptors / J Neurophysiol 2018 119 : 2276-2290
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Rusanen J, Frolov R, Weckström M, Kinoshita M, Arikawa K / Non-linear amplification of graded voltage signals in the first-order visual interneurons of the butterfly Papilio xuthus / J Exp Biol 2018 221(Pt 12) : jeb179085
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Frolov R / On the role of transient depolarization-activated K+ current in microvillar photoreceptors / J Gen Physiol 2018 150 : 1287-1298
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Frolov R, Immonen E, Saari P, Torkkeli P, Liu H, French A / Phenotypic plasticity in Periplaneta americana photoreceptors / J Gen Physiol 2018 150 : 1386-1396
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Saari P, Immonen E, French A, Torkkeli P, Liu H, Heimonen K, Frolov R / Electrical interactions between photoreceptors in the compound eye of Periplaneta americana / J Exp Biol 2018 221(Pt 21) : jeb189340
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Saari P, Immonen E, Zhukovskaya M, Novikova E, French A, Torkkeli P, Liu H, Frolov R / Changes in electrophysiological properties of photoreceptors in Periplaneta americana associated with the loss of screening pigment / J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2018 204 : 915-928
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Immonen E, French A, Torkkeli P, Liu H, Vähäsöyrinki M, Frolov R / EAG-based channelomes of microvillar photoreceptors are unsuited to diurnal vision / J Physiol 2017 595 : 5465-5479
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Frolov R, Matsushita A, Arikawa K / Not flying blind: A comparative study of photoreceptor function in flying and non-flying cockroaches / J Exp Biol 2017 Jul 1; 220(Pt 13) : 2335-2344
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Saari P, French A, Torkkeli P, Liu H, Immonen E, Frolov R / Distinct roles of light-activated channels TRP and TRPL in photoreceptors of Periplaneta americana / J Gen Physiol 2017 149 : 455-464
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Zhukovskaya M, Novikova E, Saari P, Frolov R / Behavioral responses to visual overstimulation in the cockroach Periplaneta americana L. / Journal of Comparative Physiology A. 2017 Dec 1; 203(12) : 1007-1015
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