How do babies develop their sense of touch?

Neurologically, among the earliest nerve tracts to develop in the human embryo is the spinothalamic, which conveys information to the brain about touch and pain. The spinothalamic nerve tract is protected and made highly efficient by an insulation of fatty myelin tissue that enfolds the tract as a sheath. As the limbs develop and tiny hands find primitive mouth, an active sucking reflex can be seen in early sonographs of the growing fetus.

As the fetus comes to term, it experiences repeated cutaneous stimulations during the newborn’s descent of the birth canal. Once the baby is born, its further developmental stages derive from a series of touch experiences: Very soon after birth the baby brings whatever she finds around her to her mouth as she starts to explore her personal environment. At about three months of age, she begins to look at her own hand, an important step in eye-hand coordination.

With time, her eye-hand coordination reflexes mature, and she can reach out with mindful purpose and make that world her own.

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