What is indicated by a positive Moro reflex in a newborn?

A positive Moro reflex in a newborn, which involves the sudden spreading of the arms and then bringing them back together upon experiencing a startling stimulus, is an important indicator of neurological function, particularly concerning the integrity of the central nervous system.

The Moro reflex is one of the primitive reflexes that typically appears at birth and generally disappears around 4 to 6 months of age. The presence of this reflex suggests that the baby's neurological pathways related to the spinal cord and brain are functioning as expected. Specifically, a positive Moro reflex indicates that the acoustic nerve and other neurological structures necessary for gross motor control are intact, contributing to the overall neurological health of the infant.

While abnormalities in the Moro reflex may raise concerns about potential developmental issues or neurological problems, a positive reflex itself indicates proper neurological functioning at this early stage, which is critical for assessing the infant’s overall health and readiness for further developmental milestones. Thus, acknowledging a positive Moro reflex signals that significant aspects of the newborn's neurological integrity are functioning well.