General Types of Animal and Human Higher Nervous Activity70
Human and animal behaviour is determined not only by congenital properties of the nervous system, but also by the influences to which the organism is continuously subjected during its individual existence; in other words, it depends on constant education and training in the broadest sense of these words. Consequently, the strong animals are divided into two groups—equilibrated and unequilibrated. Unequilibrated animals belonging to the category are met with quite often. However, the animals with this type of nervous system differ greatly, even in appearance. In weak animals both the excitatory and inhibitory processes may be weak—this would be a case of absolute weakness. The absolute weakness of the inhibitory process may also be seen from the animal’s attitude towards bromide.