What would be some developmental changes in brain and motor abilities during infancy and childhood? The time period of being an infant, which is usually from birth to two years old, is crucial for a child’s development. Before birth the brain was being developed but once you’re out of the womb it’ll grow 80% of the adult size brain by the time you’ve reached the age two. You learned some reflexes such as grasping and stepping, which have to do with motor abilities and your sense of movement and also speech during this period. The main theory behind these developments is biological processes and cognitive processes. Biological processes would deal with the brain developments and cognitive processes would have to do with things such as learning
