Fascinating to think that all the minutia of our mental activity is governed so strictly by physical matter and biology. It must be so. We are at base material objects descending from the Big Bang.
Consciousness however is not reducible to mental activity. Consciousness is pure awareness. Through consciousness we can be aware of our mind -- physical processes become thoughts, feelings, emotions, dreams, visions, sensing. The good bit about this is that awareness continues. In the beginning was awareness. It also means that higher processing speeds are possible.
Consciousness is not quantized. Nor is it digital but “analog.” Physical reality and time are quantum.