METHOD FOR TRAINING ELECTRICAL SELF-STIMULATION IN RESPONSE TO HEAD ELEVATION IN RATS BY A TELEMETRY SYSTEM THAT REGISTERS EXTRACELLULAR DOPAMINE LEVELS

V. V. Sizov; Сизов В. В.; A. A. Lebedev; Лебедев А. А.; S. S. Pyurveev; Пюрвеев С. С.; E. R. Bychkov; Бычков Е. Р.; V. N. Mukhin; Мухин В. Н.; A. V. Drobenkov; Дробленков А. В.; P. D. Shabanov; Шабанов П. Д.

doi:10.31857/S0044467723040093

METHOD FOR TRAINING ELECTRICAL SELF-STIMULATION IN RESPONSE TO HEAD ELEVATION IN RATS BY A TELEMETRY SYSTEM THAT REGISTERS EXTRACELLULAR DOPAMINE LEVELS

Authors: Sizov V.V.¹, Lebedev A.A.¹, Pyurveev S.S.¹^,2, Bychkov E.R.¹^,3, Mukhin V.N.¹, Drobenkov A.V.¹, Shabanov P.D.¹
Affiliations:
1. Institute of Experimental Medicine
2. St. Petersburg State Pediatric Medical University of the Ministry of Health of the Russian Federation
3. St. Petersburg State University
Issue: Vol 73, No 4 (2023)
Pages: 563-576
Section: МЕТОДИКА
URL: https://ogarev-online.ru/0044-4677/article/view/136111
DOI: https://doi.org/10.31857/S0044467723040093
EDN: https://elibrary.ru/WHOHOT
ID: 136111

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Abstract

In this work, we propose a method for training rats electrical self-stimulation in response to rearing head in a telemetric system that records the level of extracellular dopamine. Initially, in the experiments of J. Olds, it was shown that in response to electrical stimulation of zones of positive reinforcement, rats exhibit natural exploratory behavior aimed at finding the source of the reward. It has been suggested that a natural behavioral act, in particular rearing head, can accelerate the development and stabilization of the self-stimulation reaction. A change in the position of the head can serve as an internal proprioceptive conditioned signal. The experiments were carried out in an annular chamber, where the ventral tegmental area (VTA) was stimulated using a telemetric system when the rat’s head was raised by 38°. The self-stimulation response to rearing head was developed and stabilized during the first day of training. With pedal self-stimulation, distinct repetitive reactions were observed only on the 3rd day of training after the procedures of “pushing” on the pedal on the 1st day of training and “repulsing” from the pedal on the 2nd day of training, stabilization of the reaction was observed only by the 4th day training. After stabilization of the self-stimulation response in rats, the level of extracellular dopamine in the nucleus accumbens was recorded by fast-scan cyclic voltammetry in response to the imposed stimulation of the VTA before and after each of the three series of self-stimulation lasting 10 minutes. After each series of self-stimulation, the level of extracellular dopamine decreased, which reflects the depletion of the intracellular pool of the neurotransmitter during prolonged self-stimulation of the VTA. The conclusion is made about the prospects of using the method of training rats to electrical self-stimulation in response to rearing head to study the mechanisms of reinforcement.

Keywords

self-stimulation, extracellular dopamine level, fast-scan cyclic voltammetry, nucleus accumbens

References

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