Physiologic differences between infants, children and adults. I. Central Nervous System. Myelination of nerve fibers incomplete in newborn, muscle tone and reflexes are different (rooting/suckling reflex etc.), cerebral cortex less developed. Pain threshold of young children is lower than that of older children or adults because of more nerve endings/cm2 and immature inhibitory pathways. Infant skull much less rigid than adult; can estimate ICP by palpation of fontanelle. Autoregulation of CBF impaired in the sick newborn.
The 2016 Artesia, New Mexico, population is 12,036. There are 1,211 people per square mile (population density).
Pennsylvania has a relatively small surface area, but like many states on the eastern edge of the USA, it has a relatively dense population by comparison. It's estimated that Pennsylvania's population has reached over 12.82 million in 2018, a small increase from the 2010 Census figure of 12.7 million. Pennsylvania has a current growth rate of just 0.24%, which ranks 42nd in the nation.