Opera Medica et Physiologica

Popov A.V.

A Methodology of Calcium Dynamics Registration in Presynaptic Terminals of Neurons In Situ

Introduction

Abstract

For many decades synaptic circuits have been associated solely with cell-cell neuronal connections represented by the presynaptic terminal, which releases a neurotransmitter, and the postsynaptic neuronal specialization, a site where the neurotransmitter can activate synaptic receptors. However, due to technical limitations these studies usually were linked only to the postsynaptic site. For a long while, the widespread techniques that rapidly advanced neurophysiology have been little used in understanding the way how Ca2+-dependent release of the excitatory neurotransmitter glutamate from neuronal axons can be measured directly. Only with the advance of live cell imaging, it became possible to detect internal Ca2+ dynamics in presynaptic boutons with the high temporal resolution.

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