Final answer:
Yes, the behavior of the brain can be simulated by a Turing machine if its behavior can be described by a mathematical function.
Step-by-step explanation:
Given the Church-Turing Thesis, which states that any function that is effectively calculable is computable by a Turing machine, the discovery that the behavior of the brain can be completely described by a mathematical function would indeed entail that the behavior of the brain can be simulated by a Turing machine. This is because a Turing machine is a mathematical model of computation that is capable of simulating any function that can be computed. If the behavior of the brain can be described by a mathematical function, then it can be simulated by a Turing machine.