[The involvement of intracellular calcium in the sensitization of command neurons in the defensive behavior of the edible snail].
Examinations carried out on command neurons of defensive behaviour of snail carried out using electrophysiological methods and a chlorotetracycline fluorescent probe have revealed that a single sensitizing action induces alterations of electrical neuronal activity and bound calcium (Ca-C) level in cells. An initial increase of the Ca-c amount (the first 15-20 min after the sensitizing action) coincides in time with depolarization, enhancement of plasma membrane excitability as well as with a decrease of amplitude and duration of the IPSPs induced by sensory stimulations. Repeated pronounced increase of the Ca-c level develops 50-60 min after the sensitizing action and correlates with facilitation of neuronal responses to sensory stimuli. Alteration of the Ca-c level in command neurons of defensive behaviour in the course of sensitization development differed from the previously described Ca-c shifts in the same cells in the course of habituation development in dynamics and direction.
V P
VP
Nikitin
S A
SA
Kozyrev
M O
MO
Samoĭlov
D000818:Animals; D002118:Calcium / Q000502:physiology*; D002751:Chlortetracycline; D004594:Electrophysiology; D004924:Escape Reaction / Q000187:drug effects / Q000502:physiology*; D005456:Fluorescent Dyes; D006372:Helix, Snails / Q000187:drug effects / Q000502:physiology*; D066298:In Vitro Techniques; D009474:Neurons / Q000187:drug effects / Q000502:physiology*; D010812:Physical Stimulation; D011803:Quinine / Q000494:pharmacology; D013997:Time Factors
D005456:Fluorescent Dyes; D011803:Quinine; D002118:Calcium; D002751:Chlortetracycline
Vovlechenie vnutrikletochnogo kal'tsiia v protsess sensitizatsii komandnykh neĭronov oboronitel'nogo povedeniia vinogradnoĭ ulitki.