The bulb is an archaic term for the medulla oblongata and in modern clinical usage the word bulbar (as in bulbar palsy) is retained for terms that relate to the medulla oblongata, particularly in reference to medical conditions.
Pi is transcendental. The endless number cannot be expressed by any algebraic equation. No pattern has been found in its digits, Yet it cannot be proven in a finite amount of time. That no pattern exists in an infinite number of digits. Pi goes beyond our reality.
Life of Pi was an inspiring book and this is a beautifully written film review, but I'm not sure why it was published on Psychology Today. I was looking for an in depth psychological analysis of the book, but this is an opinion piece with strong religious assumptions, and very little science.