Brainstem

1) Brainstem Parts 

• Midbrain- most superior portion
• Pons- middle portion
• Medulla- lowest portion 
• Twelve Cranial Nerves

2) Brainstem Functions

• Regulates major life functions (e.g., heart beat, respiration) 
• Mediating head and neck reflex (e.g., gag via cranial nerves 
• Regulates alertness and wakefulness