Infant Reflexes
Bobo Team • All you need to know • 3 min read
Newborns are equipped with a set of reflexes that are essential for their survival and development. These reflexes are involuntary and automatic responses to specific stimuli, and they provide important insights into the health and development of your baby's nervous system. Here is a guide explaining the key reflexes your baby will exhibit, their purposes, and when you can expect them to fade.
Key Infant Reflexes
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Moro Reflex (Startle Reflex)
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What It Looks Like: When a baby is startled by a loud noise or sudden movement, they will throw their head back, extend their arms and legs, cry, then pull their arms and legs back in.
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Purpose: This reflex is a protective response to sudden changes in the environment, helping the baby react to potential threats.
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When It Disappears: The Moro reflex typically fades around 2-6 months of age.
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Rooting Reflex
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What It Looks Like: When you stroke your baby's cheek or mouth, they will turn their head toward the stimulus and begin to make sucking motions.
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Purpose: This reflex helps the baby find the breast or bottle to begin feeding.
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When It Disappears: The rooting reflex usually disappears by 4-6 months of age.
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Sucking Reflex
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What It Looks Like: When the roof of your baby's mouth is touched, they will start to suck.
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Purpose: This reflex is crucial for feeding and helps the baby coordinate sucking, swallowing, and breathing.
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When It Disappears: The sucking reflex begins to fade as the baby develops more voluntary control over feeding, typically around 4 months of age.
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Palmar Grasp Reflex
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What It Looks Like: When you place a finger or object in your baby's palm, they will grasp it tightly.
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Purpose: This reflex may have evolutionary roots, helping infants cling to their caregivers.
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When It Disappears: The palmar grasp reflex usually fades by 5-6 months of age.
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Plantar Grasp Reflex
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What It Looks Like: When you stroke the sole of your baby's foot, their toes will curl tightly.
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Purpose: Similar to the palmar grasp, this reflex may have evolutionary significance.
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When It Disappears: The plantar grasp reflex typically disappears by 9-12 months of age.
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Tonic Neck Reflex (Fencing Reflex)
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What It Looks Like: When your baby's head is turned to one side, the arm on that side will extend, and the opposite arm will bend at the elbow, resembling a fencer's stance.
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Purpose: This reflex helps develop hand-eye coordination and muscle tone.
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When It Disappears: The tonic neck reflex usually fades by 5-7 months of age.
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Stepping Reflex
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What It Looks Like: When you hold your baby upright with their feet touching a solid surface, they will make stepping motions.
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Purpose: This reflex is a precursor to walking.
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When It Disappears: The stepping reflex typically disappears by 2 months of age but reappears as voluntary walking movements later in the first year.
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Why Babies Have These Reflexes
Infant reflexes are crucial for survival and development. They help with feeding, protection, and the development of motor skills. These reflexes are also indicators of a healthy nervous system. Pediatricians check these reflexes to ensure that your baby's brain and nervous system are developing properly.
When to Be Concerned
While the presence of these reflexes is normal and expected, their absence or persistence beyond the typical age range can indicate potential neurological issues. If you notice any of the following, consult your pediatrician:
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Reflexes that are absent or significantly weak.
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Reflexes that persist beyond the expected age.
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Asymmetrical reflexes (one side of the body responds differently than the other).
Sources
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HealthyChildren. (2022, August 03). Newborn reflexes. https://www.healthychildren.org/English/ages-stages/baby/Pages/newborn-reflexes.aspx
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Stanford Children's Health. (n.d.). Newborn reflexes. https://www.stanfordchildrens.org/en/topic/default?id=newborn-reflexes-90-P02630
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Cleveland Clinic. (2022, June 14). Newborn reflexes. https://my.clevelandclinic.org/health/articles/23265-newborn-reflexes
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Medline. (2023, June 11). Infant reflexes. https://medlineplus.gov/ency/article/003292.htm
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