Breathing in autonomic very little brain activity is required. All you need is a living brain stem and an intact Phrenic nerve.
It is her walking that is amazing. Walking requires balance and coordination.
I am continuously amazed that her brain can sustain the coordination required to maintain her body upright. With the statements that come out of that mouth I am amazed that her brain has the capacity to coordinate chewing gum with her eyes open let alone walk!