There is a misguided analogy that creats an illusion of understanding that stands on the way to the true understanding of consciousness. It is called 'Emergent Property'. There is a good reason why consciousness rather is a Fundamental property.
There are 2 types of 'emergence'. One is 'weak emergence' and the other is 'strong emergence'. As we will see, non of those can explain consciousness.
If we think of neurones as to cause consciousness, we should immediatly notice an insurmountable problem. Non of the activities that we can observe individual neurones do constitute a valid 'proto-consciousness' out from which consciousness can emerge as 'weak emergance'. It is easy to see that whatever can emerge from EM forces in neuron is just a collective pattern of forces that are different from the forces in individual neurones. In other words the only property that can weakly emerge is a BEHAVIOUR but never CONSCIOUSNESS.