[header] How to understand the four main parts of the brain [title] Explore the largest section of the brain. [step] The brain weighs approximately 3 pounds, and the cerebrum occupies 80% of this mass. Important brain functions such as thought, memory, judgement, and decision-making are all controlled in the cerebrum. 
[title] Understand the sections of the cerebrum. [step] The cerebrum is divided into four lobes, each with a specific function : [substeps] Frontal lobe: high levels of perception and motor skills are controlled by the frontal lobe.