[Development of electro-excitable properties of spinal cord chick embryo neuronal membranes in the process of their differentiation in culture].

Two types of neurons are distinguished proceeding from their morphology and electrophysiological characteristics during early days of development in culture. The "mature" cells prove to be motoneurons and die by the 5th-7th days in vitro. They possess a sodium and two-component potassium currents. Neuroblasts represent another type of cells. They are not able to generate the action potential and potassium current consists only of one component. These cells are differentiated during cultivation.