The skin receives information from the outside world and transmits it to the central nervous system where the information is processed.

The receptors in the skin are the ones that constantly receive different information. They are responsible for the development of the baby’s first movements while still in the mother’s womb, initiating the appearance, development and maturation of reflexes.

The image you are looking at is a projection of our body’s sensations. The emphasized parts of the body have many more receptors (mouth and hands) than the other parts of the body (trunk, legs).

This is one of the explanations why speech therapy treatment can be improved and accelerated by hand stimulation, tactile integration and integration of primitive hand reflexes.
The projection of the mouth and hands in the sensory center in the cerebrum is very closely related.