A newborn client has a positive Babinski's reflex upon admission to the nursery. Which of these actions should the nurse take?

Choice A rationale The Babinski's reflex, or plantar reflex, is tested by stroking the sole of the foot from the heel up to the toes. A positive reflex in an infant or young child is characterized by dorsiflexion of the big toe and fanning out of the other toes. This is considered a normal primitive reflex in newborns and infants, indicating an immature corticospinal tract, and therefore does not suggest a problem with the central nervous system unless it persists past 12 to 18 months of age. Choice B rationale The positive Babinski's reflex in a newborn is a physiological neurological finding. It reflects the incomplete myelination of the pyramidal tract (corticospinal tract), which is responsible for controlling voluntary movement. As the nervous system matures and myelination is completed, this reflex should disappear, typically between 12 and 18 months of age. Prior to this timeframe, no intervention is required as it is expected. Choice C rationale A seizure disorder is generally characterized by abnormal, rhythmic electrical activity in the brain, leading to clinical manifestations like involuntary muscle contractions, changes in consciousness, or behavior. While a neurological assessment is crucial, the positive Babinski's reflex is a normal, expected finding in a newborn, not a specific sign or indicator of an underlying seizure predisposition or active seizure disorder; other signs would be more pertinent. Choice D rationale Hypoglycemia in a newborn is defined as a low plasma glucose concentration (e.g., typically <40-50 mg/dL) and can cause nonspecific neurological signs such as jitteriness, lethargy, or poor feeding. However, the positive Babinski's reflex is a normal developmental reflex, not a sign specifically associated with metabolic disturbances like hypoglycemia; therefore, a blood glucose request isn't directly indicated by this reflex alone.