Maturation
biological growth that enables orderly change in behavior relatively uninfluenced by experience
Brain development
more cells are forming at an explosive rate of 1/250,000 per min. Developing brain cortex actually over produces neurons with number peaking at 28 weeks. Infancy on brain and mid develop together on the day you’re born most brain cells you have now. The brain branching neural network to do your motor skills
Motor development
Skills emerge as infants exercise their maturing muscles and nervous system. With occasional exceptions, motor development sequences are universal. These behaviors are maturing nervous system; blind children crawl before walking. Nurture may amend with nature intends.
Infantile amnesia
inability for most adults to retrieve episodic memories before the age of 3 to 4 years old. It may also refer to scarcity or fragmentation of memories recollected from early childhood particularly occurring between 3-6 years old.