Is the brain in superposition?

In Quantum Mechanics, superposition is the ability of a system to be in multiple states until a measurement is taken. Given the uncertainty in human decision-making process, the brain in a state of superposition, will provide ultimate flexibility and possibly the lowest energy consumption for a unit of decision. Evolution likely optimized the system this way and if so it has implications for many fields including Neuroscience and Economics.

There are different design questions. At the micro-level, the neurons could exhibit quantum effects and superposition. The larger question is whether the entire system, or at the very least parts of it, could be in a state of superposition till a conscious need for a decision or measurement. If this is possible, it may give insights into the design of quantum computers and such macro systems. Since the brain does not appear to require highly specialized environmental conditions to function, this may mean that superposition in macro systems is possible, albeit this may be bad news for the Schrödinger’s cat. There has been plenty of speculation that the brain is a quantum computer. Its architecture appears different from conventional computers and it seems to be immensely capable in computations with very low energy and information bandwidth. There has to be something special that allows the brain to be so efficient.

It is possible that every decision a human makes results in the collapse of the wave function at the point of decision. Till then, anything is possible?