When addressing the issue of brain development in infants, it is necessary to mention the 2 most important lobes in summary:

Frontal lobe

The frontal lobe of the brain is located behind the forehead. The frontal lobe handles behaviors such as walking, talking, problem solving, and some aspects of emotions. Improvement in this area happens when your baby becomes more mobile and verbal. This accelerates between about 6 months and 12 months.
When your baby starts to tickle, the left part of his brain lights up with activity. When he listens to his favorite lullaby or sees a toy piece intertwined, the right side of his brain is in motion.
For most people, language production is controlled by the left side of the brain, while the right side is responsible for interpreting the emotional content of speech with its own tone and rhythm.
The frontal lobe matures over time and takes years to develop. New functions are constantly added in childhood. The brain is so active in childhood that the average 5-year-old uses half of the calories they consume to feed them.

Temporal lobe

The temporal lobe controls hearing, smell, and language comprehension. It works with the amygdala and hippocampus to activate learning, memory and emotional responses.
Hearing is one of the first steps to complete development among babies. A few minutes after birth, newborn children cry out loud, surprisingly. Because this early physical development develops long before your baby is born.
Research shows that the inner ear is the only sense organ that is fully formed before birth. The inner ear reaches adult size in the middle of pregnancy.

Smell develops early in your baby’s life. Researchers say premature babies born at seven months of gestation respond to smells, and so the necessary tools for detecting smells mean that they function even before birth.
Even in their first days, newborns react to smells and smile with sugary smells while showing a crumpled facial expression to unpleasant smells such as rotten eggs. By the end of their first week, a baby becomes able to turn to their mother’s pacifier soaked in milk, but they ignore the milk of other breastfeeding mothers.

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