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Moro reflex. The Moro reflex is often called a startle reflex because it usually occurs when a baby is startled by a loud sound or movement. In response to the sound, the baby throws back his or her head, extends out the arms and legs, cries, then pulls the arms and legs back in. A baby's own cry can startle him or her and trigger this reflex. This reflex lasts about 5 to 6 months. Tonic neck reflex. When a baby's head is turned to one side, the arm on that side stretches out and the opposite arm bends up at the elbow.
palmar grasp reflex. A normal reflex in a the newborn in which the baby's fingers spontaneously curl around any object placed within them and do not spontaneously let go.This reflex usually diminishes by age 3 to 4 months and disappears before age 6 months.The reflex reappears later in life in diseases that affect the frontal lobes of the brain.his reflex usually diminishes by age 3 to 4 months and disappears before age 6 months. The reflex reappears later in life in diseases that affect the frontal lobes of the brain.