1. Responsible for our instinctive, autonomic behavior and serves survival functions
2. The medulla controls vital functions like respiration, blood circulation, digestion, and heart rate
3. The cerebellum regulates posture, balance, and muscular coordination
4. The pons bridges medulla and other parts of the brain. It regulates movement, sleep, and arousal
5. The reticular activating system regulates attention, movement, sleep, waking, and reflexes