| Abstract: | Electrical stimulation and ablation of the midbrain structures in hens and one-day old chickens have revealed the structures (ICO, MLD, MLV, IPC and IMC) involved in the formation of vocal reactions. The paper outlines the functional characteristics of the structures and their dissimilarities which are determined by the type of their units. In the course of individual development of the hens, there is an increase of excitability and lability of the nervous processes in the examined structures. |
