Sensory gating is defined as the automatic process of inhibiting brain response to repeated
auditory sounds. Infants who brains respond similarly to two identical sounds presented about
1/2 second apart are more likely to have later problems with attention than infants who
suppress response to the second sound. This study will examine whether providing a
nutritional supplement, phosphatidylcholine, for two months in infancy will result in an
increased likelihood of developing more robust sensory gating.