When the roof of the baby's mouth is touched, the baby will start to suck. This reflex doesn't start 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.
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. 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. These movements help them push up onto their hands and knees. By the time they reach their first to second birthday, the STNR should have fully disappeared.
A study suggested that preschool children who retained the TLR and ATNR reflexes had difficulty with motor skills such as running, cycling, throwing, or catching a ball. For these children, even rolling, bringing their hands together, or bringing their hands to their mouth can be awkward.
In the long run, an unintegrated ATNR may also lead to spinal deformities. An unintegrated ATNR reflex may also lead to poor eye tracking. Now you know why reaching for a rattle is a cause for celebration.
The same study of 35 children concluded that children with an unintegrated STNR reflex showed poor posture, poor eye-hand coordination, and focusing difficulties.
They also had difficulty sitting still at a desk, learning to swim, and playing ball games. Ditto for children who retained the plantar, palmer, and Galant reflexes. Usually, this is a sign of neurological disease. In an older study , people with dementia showed an abnormality in the plantar reflex. It was no longer integrated and the adults showed the reflex in the same way that babies do. A study found that nursing home residents with a sucking reflex that had reappeared had a greater risk of malnutrition and pneumonia.
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Gripe water is a remedy available in liquid form. It contains a mixture of herbs and is often used to soothe colicky babies. Reflexes help identify normal brain and nerve activity. Some reflexes occur only in specific periods of development. 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 the mouth to follow and "root" in the direction of the stroking. This helps the baby find the breast or bottle to begin feeding. The root reflex lasts until about 4 months of age; then it is replaced by voluntary turning of the head to the nipple. The sucking reflex, like rooting, is an automatic survival action. Rooting actually helps the baby become ready to suck.
When the roof of the baby's mouth is touched, the baby will begin to suck. Hence, premature babies may have a weak or immature ability to suck. Babies also have a hand-to-mouth reflex that goes with rooting and sucking and may suck on fingers or hands.
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