Complex sentence: This "pull to stimulus" is seen in infants, but as the frontal lobe matures, these instinctive reflexes are inhibited and they can control these urges when interacting in the environment.
Split into simpler sentences: This "pull to stimulus" is seen in infants. As the frontal lobe matures however, these instinctive reflexes are inhibited and they can control these urges when interacting with the environment.