Newborn Reflexes: Nursing Assessment and Care

Newborn reflexes are involuntary movements an infant makes in response to specific stimuli. They are present at birth and fade as the nervous system matures, which makes them a fast, reliable window into neurological and physical development. Check alertness, muscle tone and strength, head control, and response to handling every time. A missing or asymmetric reflex is a red flag worth chasing.

Here are the maneuvers for 11 newborn reflexes.

1. Blink Reflex

Rapid eye closure when an object approaches. Like in adults, it protects the eye. Elicit it by shining a strong light (flashlight, otoscope) on the eyes or moving an object suddenly toward them. It checks visual attentiveness.

2. Rooting Reflex

Brush the cheek or stroke near the mouth and the newborn turns toward that side. It helps the baby find the food source: when the mother's breast brushes the cheek, the baby turns and starts sucking. Disappears by the 6th week, once the baby can steadily focus on a food source.

3. Sucking Reflex

Touch the lips and the baby makes sucking motions. Like rooting, it helps the baby feed. Disappears around 6 months of age.

4. Extrusion Reflex

Until 4 months of age, food placed on the anterior tongue is pushed back out. It protects against swallowing toxic substances and is why solids start around 6 months.

5. Palmar Grasp Reflex

Place an object on the palm and the newborn grips it, sometimes strongly enough to be lifted momentarily from supine. Disappears between 6 weeks and 3 months.

6. Walk-in-Place Reflex

Hold the newborn upright with feet on a hard surface and the baby takes a few alternating steps. Lasts until about 3 months, when the baby starts bearing real weight. A near-twin is the placing reflex: touch the anterior lower leg to the edge of a bassinet or table and the baby makes a few lifting, stepping-up motions.

7. Tonic Neck Reflex

Turn the head to one side and the extremities on that side extend while the opposite side flexes. Also called the fencing or boxer reflex. It appears to have no clear function but is linked to eye stimulation and handedness. Disappears between 8 and 12 weeks.

8. Moro Reflex

Most often elicited by the drop method: lift the baby off the bed supporting head and neck, then lower rapidly until only 4 to 8 inches remain between baby and bed, keeping the baby supine. A complete Moro is bilateral arm abduction, forearm extension, and full opening of the hands, then a slow return to midline and curling of the fingers. The startle reflex differs in that it lacks full extension and hand opening and can be triggered by sudden noise or movement.

9. Babinski Reflex

Stroke the sole in an inverted "J" from heel upward and the toes fan. A positive Babinski is normal only in newborns. Disappears after the 3rd month.

10. Reflexes of Spinal Cord Integrity

Three tests check spinal cord integrity. Magnet reflex: press the soles of a supine newborn and the baby pushes back. Crossed extension reflex: with one leg extended and its sole irritated by a sharp object (a thumbnail), the baby raises and extends the other leg as if pushing the irritation away. Trunk incurvation reflex: in prone, touch the paravertebral area and the baby flexes the trunk and swings the pelvis toward the touch.

11. Landau Reflex

Hold the baby prone supporting the trunk. The baby should show some muscle tone. Sagging into an inverted "U" signals very poor tone and needs further assessment.

Master these maneuvers. Neuromuscular dysfunction can signal serious problems like spinal cord injury, neonatal sepsis, and inborn errors of metabolism, and these simple checks catch them early enough to act.