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Baby 2½ weeks old. When the cheek is brushed or stroked, a newborn infant turns the head in the direction where the cheek near the corner of the mouth is brushed . This reaction serves to help a newborn find food (imaging that babys did not have this reflex, it would be rather difficult to feed them). The reflex disappears at about the sixth week of life. At this time, newborn eyes focus steadily, so a food source can be seen, and the reflex is no longer needed. the vid ends with a pre-war demonstration of
