Electrical excitability of muscles in newborns in connection with the structure of muscles and nerve fibers

The first works that were done in this direction) date back to 1877, when Soltmann, on the basis of a number of experiments, proved that: the excitability of the motor nerves of a newborn with electrical stimulation is less, less pronounced than that of an adult; this excitability increases with the gradual growth of the animal up to the 6th week inclusive, when it reaches a similar value in an adult, sometimes even exceeding it; the myogram of a newborn is similar to that of a tired animal, it is characterized by a slight maximum increase and a gradual decrease, and the top of the curve is in the form of a plane, since the muscle remains longer at maximum contraction.