What reflexes should be present in a newborn?
Reflexes are involuntary movements or actions. Some movements are spontaneous and
occur as part of the baby's normal activity. Others are responses to certain actions.
Healthcare providers check reflexes to determine if the brain and nervous system are
working well. Some reflexes occur only in specific periods of development. The following
are some of the normal reflexes seen in newborn babies:
This reflex begins when the corner of the baby's mouth is stroked or touched. The
baby will turn his or her head and open his or her mouth to follow and root in the
direction of the stroking. This helps the baby find the breast or bottle to begin
feeding. This reflex lasts about 4 months.
Rooting helps the baby become ready to suck. When the roof of the baby's mouth is
touched, the baby will begin to suck. This reflex does not begin until about the 32nd
week of pregnancy and is not fully developed until about 36 weeks. Premature babies
may have a weak or immature sucking ability because of this. Because babies also have
a hand-to-mouth reflex that goes with rooting and sucking, they may suck on their
fingers or hands.
The Moro reflex is often called a startle reflex. That’s 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 his or her 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 until the baby is about 2 months old.
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. This is often called the fencing position. This
reflex lasts until the baby is about 5 to 7 months old.
Stroking the palm of a baby's hand causes the baby to close his or her fingers in
a grasp. The grasp reflex lasts until the baby is about 5 to 6 months old. A similar
reflex in the toes lasts until 9 to 12 months.
This reflex is also called the walking or dance reflex because a baby appears to take
steps or dance when held upright with his or her feet touching a solid surface. This
reflex lasts about 2 months.