The structures remain the same. You will always have 4 brain lobes (frontal, parietal, temporal and occipital), a cerebellum (involved in coordination of movement and balance) and many gyri (bumps of the brain) and sulci (grooves of the brain).
However, everything you do in your life can have an impact at a cellular level (brain cells/ neurons). After you are born, your brain will get larger as it creates new brain cells. Your brain will keep growing until about 18 years of age. Every time you learn something, you create new connections between brain cells. You are also able to re-shape these brain connections through new experiences. This is called brain plasticity and continues throughout life!
No! There are many parts of the brain. We start the BrainReach year by describing the 4 lobes of the brain, as well as the cerebellum and brainstem. However, if we were to slice the brain in half lengthwise, we would see many other structures that are deep inside the brain. For example, you would see the corpus callosum (which connects the left and right hemisphere of the brain), and structures of the limbic system (involved in emotions, learning and memory). Every single part of the brain is connected. For example, injuring a part of the limbic system can impact connections it has with the frontal lobe.