Why does the infant stepping reflex disappear?
Primitive reflexes; Reflexes in infants; Tonic neck reflex; Galant reflex; Truncal incurvation; Rooting reflex; Parachute reflex; Grasp reflex A reflex is a muscle reaction that happens automatically in response to stimulation. Certain sensations or movements produce specific muscle responses. Infantile reflexes are tested and observed by medical professionals to evaluate neurological function and development. Absent or abnormal reflexes in an infant, persistence of a reflex past the age where the reflex is normally lost, or redevelopment of
an infantile reflex in an older child or adult may suggest significant central nervous system, nerve trunk, or peripheral nerve problems. The Moro reflex is a
normal reflex for an infant when he or she is startled or feels like they are falling. The infant will have a startled look and the arms will fling out sideways with the palms up and the thumbs flexed. Absence of the Moro reflex in newborn infants is abnormal and may indicate an injury or disease. The presence and strength of a reflex is an important sign of nervous
system development and function. Many infant reflexes disappear as the child grows older, although some remain through adulthood. A reflex that is still present after the age when it would normally disappear can be a sign of brain or nervous system damage. Infant reflexes are responses that are normal in infants, but abnormal in other age groups. These include: Other infant reflexes include: TONIC NECK REFLEX This reflex occurs when the head of a child who is relaxed and lying face up is moved to the side. The arm on the side where the head is facing reaches away from the body with the hand partly open. The arm on the side away from the face is flexed and the fist is clenched tightly. Turning the baby's face in the other direction reverses the position. The tonic neck position is often described as the fencer's position because it looks like a fencer's stance. TRUNCAL INCURVATION OR GALANT REFLEX This reflex occurs when the side of the infant's spine is stroked or tapped while the infant lies on the stomach. The infant will twitch their hips toward the touch in a dancing movement. GRASP REFLEX This reflex occurs if you place a finger on the infant's open palm. The hand will close around the finger. Trying to remove the finger causes the grip to tighten. Newborn infants have strong grasps and can almost be lifted up if both hands are grasping your fingers. ROOTING REFLEX This reflex occurs when the baby's cheek is stroked. The infant will turn toward the side that was stroked and begin to make sucking motions. PARACHUTE REFLEX This reflex occurs in slightly older infants when the child is held upright and the baby's body is rotated quickly to face forward (as in falling). The baby will extend his arms forward as if to break a fall, even though this reflex appears long before the baby walks. Examples of reflexes that last into adulthood are:
CausesInfant reflexes can occur in adults who have:
When to Contact a Medical ProfessionalThe health care provider will often discover abnormal infant reflexes during an exam that is done for another reason. Reflexes that remain longer than they should may be a sign of a nervous system problem. Parents should talk to their child's provider if:
What to Expect at Your Office Visit
The provider will perform a physical exam and ask about the child's medical history. Questions may include:
ReferencesChaves-Gnecco D, Feldman HM. Developmental/behavioral pediatrics. In: Zitelli BJ, McIntire SC, Nowalk AJ, Garrison J, eds. Zitelli and Davis' Atlas of Pediatric Physical Diagnosis. 8th ed. Philadelphia, PA: Elsevier; 2023:chap 3. Schor NF. Neurological evaluation. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 608. Walker RWH. Nervous system. In: Glynn M, Drake WM, eds. Hutchison's Clinical Methods. 24th ed. Philadelphia, PA: Elsevier; 2018:chap 16. Version InfoLast reviewed on: 12/10/2021 Reviewed by: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. At which age does the stepping reflex disappear in the infant?Newborn Reflexes. What does disappearance of a reflex indicate?Many infant reflexes disappear as the child grows older, although some remain through adulthood. A reflex that is still present after the age when it would normally disappear can be a sign of brain or nervous system damage. Infant reflexes are responses that are normal in infants, but abnormal in other age groups.
What is the stepping reflex in infants?Stepping reflex
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.
What happens if stepping reflex does not integrate?It should integrate gradually as other systems mature and disappear by 3 1/2 years old. If retained, the TLR can lead to poor muscle tone, a tendency to walk on toes, motion sickness, and poor balance.
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