Extremely premature infants are born before the nervous system is mature enough to handle outside stimuli without becoming overstimulated. Such an infant is said to have a disorganized nervous system.
If your premature infant has a disorganized nervous system, you may notice physical reactions (destabilization) in the presence of too much sound, touch, movement, or light, including:
If you see such signs, give your infant some peace and quiet. The next time you're together, try only one stimulus at a time (such as touch or voice, but not both).
WebMD Medical Reference from Healthwise