First thoughts
As far as the eye can see when we first touch down, there's an overwhelming amount of cerebrum. No wonder it's so big, it's responsible for sensing, thinking, learning, emotion, consciousness, and voluntary movement. Wow. As we look around, we notice some clear divisions. This land is quite obviously not all cerebrum. There have obviously been some divisions, but the separation seems to have been friendly. We see neurons from different regions all communicating with each other, there's even a postal service called Synapse Fast Inc. that has been established to keep relations friendly and prevent any hostility. They send neurotransmitters to let each other know what's happening. Even within these little regions, neurons still seem to respect each other's space, having sulci to keep them apart and inhabiting these bumps called gyri.
Second thoughts
After trekking through the cerebrum, the next region we hit is the cerebellum, which controls fine muscle movement and balance. It's also a pretty big region although not nearly as massive as the cerebrum. They say opposites attract because they balance each other out. Ha, balance. Oh terrible wordplay. But that must be why they're so close to each other. Cerebrum is the one handling all conscious activity getting plenty of credit while the cerebellum is the unsung hero providing little things like balance so the cerebrum can handle voluntary movement at all. We almost hit the spinal cord after that but that isn't necessarily part of the brain so we stay away from it for the most part. It's main function is to connect the peripheral nervous system to the brain. It connects directly to both the cerebellum and the medulla. For the cerebellum, it must be how it gets all of the information on balance since the PNS contains all the nerves in the body. As for the medulla, that's responsible for involuntary actions such as circulation and breathing, both very important and entirely involuntary. The close proximity to the spinal cord which is essentially the messenger from the body must be so essential actions such as those are served first and the body doesn't risk death. From the medulla, we reach the pons, which is involved in sleep and arousal. Also something essential for survival and just plain functioning. Without sleep, we risk losing some incredibly important capabilities such as memory and in extreme cases, lack of sleep can result in death by falling asleep at the wheel of a car. So here we've found yet another important part of the brain with somewhat involuntary functions, all snug together to make sure they get the messages first to keep the essentials going. We then end up back in the cerebrum but in the bottom this time. In the near middle is the oculomotor nerve, which controls eye and eyeball movement which frankly makes plenty of sense. This nerve probably fits right in with the cerebrum, bonding over all their voluntary work no doubt. But then there's the pituary gland.. well it doesn't exactly come to mind as voluntary. It's in charge of the endocrine system, which keeps tabs on factors such as growth hormones. We feel like this little guy would it in better with the involuntary crew back near the spinal cord but it must be here to keep the cerebrum informed on base desires so it can make voluntary decisions based off of it. The optic chiasma and nerves are responsible for transferring the information from the retina into the brain while the olfactory bulb recieves neural input from the nasal cavity. Both of them are responsible for senses located on the face and makes sense being close together near the cerebrum as they are often necessary to make observations and thus elicit emotion and conscious thought.
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