The frontal lobe, or the region in the brain that regulates important cognitive skills in human beings (among them emotional expression, memory, and problem-solving), will be more matured in Mr. Lorre compared to his one-year-old son. As our cognitive skills tend to advance as we age, the frontal lobe in a baby is still premature. Thus, although the frontal lobe would still be present and coordinate most of the baby’s voluntary behavior such as walking, talking, and expressing some emotion, the frontal lobe of the child still needs to grow/develop with the coming years. Ultimately, Mr. Lorre’s frontal brain will be more developed and will be used to coordinate more high-level cognitive skills than his son’s, such as having more advanced memory and problem-solving skills.
His one-year-old son would have considerable more REM sleep, or one of the most important sleep stages characterized by rapid movement in the eyes and vivid dreaming, than Mr. Lorre. As we age, our REM durations get shorter; thus, his one-year-old son (who would spend most of his days sleeping) would undergo a significant more amount of REM sleep stages compared to his father (who requires less sleep).
Serotonin is an excessively important neurotransmitter responsible for our moods, hunger, and sleep. Especially for Peter, a one-year-old child, low amounts or not enough serotonin may result in SIDS, or sudden infant death. Thus, it is important to regulate just the right amount of serotonin in order for him for his bodily functions to work and support his health.
The medulla, a portion of the brain that controls our natural bodily processes such as breathing, beating, and blood pressure, is also vital for Peter’s health. Any defect with the medulla would be lethal for him and damage one of his vital life functions, as the medulla regulates and manages our most important internal organs (heart, lungs, etc.).
In order to eat independently, Peter’s cerebellum– the portion of the brain that manages balance, coordination, muscle movement– must be working properly. As the cerebellum mainly works with one’s movement and coordination, it’ll definitely aid with Peter’s first actions of, for example, feeding himself with a spoon or holding the dish properly so he could eat.
The ventromedial hypothalamus, or the portion of the brain’s hypothalamus that suppresses one’s hunger, prevents Peter from overfeeding himself! Without the ventromedial hypothalamus, Peter would eat forever (as no portion of the brain is alerting him or arousing his sense of “fullness”), thus negatively affecting his health.
Thyroxine, a hormone secreted inside of the thyroid gland, increases the body’s metabolism. Thus, as Peter learns how to feed himself and is steadily consuming food independently, the thyroxine throughout his bloodstream will speed up the rate of his metabolism, or how fast or slow his body breaks down/burns the energy from his nutrients.