As a child grows up, his tone weakens and allows him to start moving actively. He begins to move his arms, legs, take items, raise his head. It is important that the tone changes correctly and simultaneously in all muscles. If, for example, the upper limbs are tensed for a long time, it will be more difficult for the child to use them, and he will develop the relevant skills later. Long hypertonicity of the lower limbs can cause problems with the development of walking skill.
