The main gain of this period is to rotate the waist. Lying down, the child first tosses the bowl to the side, then the legs and then the body. "It is a spinning disconnected from the chest. It means that the strengthening of the muscles has reached the waist," says pediatrician Lembo. The baby is close to sitting. Their arms and legs become agile, they do not rest during the bath as parents may notice. Babies seem to enjoy this moment to practice voluntary, rhythmic movements. This agitation helps to organize the brain, forming connections between cells and setting a pattern for when it has the power to crawl. It is already standing when it is held at the waist.
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