On average a newborn baby’s brain weighs about 350 – 400 grams which is about the size of a grapefruit. Every part of the brain has a function.
Microcephaly is a condition where a baby's head is much smaller than expected when compared to other babies of the same age or gender. During pregnancy, a baby's head grows to allow for the growth of the baby's brain. With microcephaly the baby's brain may not have developed properly during pregnancy, or stops growing after birth. Microcephaly can be due to changes in the genes or exposure to infections during pregnancy, such as rubella, toxoplasmosis or cytomegalovirus. It can also be caused by exposure to harmful substances such as alcohol, certain drugs or toxic chemicals.
A seizure is a sudden surge or burst of electrical activity in the brain. It can be caused by an event that happened to the individual during birth, exposure to alcohol and drugs, stroke, head or brain trauma.