Christof Koch now teams with psychiatrist and neuroscientist Giulio Tononi in applying principles of integrated information, computation and complexity to the brain's neuronal and network-level electrochemical activities. In their view, consciousness depends on a system's ability to integrate complex information, to compute particular states from among possible states according to algorithms. Deriving a measure of complex integration from EEG signals termed 'phi', they correlate consciousness with critically complex levels of 'phi'.
Regarding the 'hard problem', Koch, Tononi and their physicist colleague Max Tegmark have embraced a form of panpsychism in which consciousness is a property of matter. Simple particles are conscious in a simple way, whereas such particles, when integrated in complex computation, become fully conscious (the 'combination problem' in panpsychism philosophy). Tegmark has termed conscious matter 'perceptronium', and his alliance with Koch and Tononi is Crick's legacy and a major force in the present-day science of consciousness. Their view of neurons as fundamental units whose complex synaptic interactions account for consciousness, also supports widely-publicized, and well-funded 'connectome' and 'brain mapping' projects hoping to capture brain function in neuronal network architecture.I can see absolutely nothing but gibberish in the vague array alternatives to this sort of approach mentioned by Chopra, Penrose, Hameroff and others: non-computational, quantum superpositional, connected to spacetime geometry, involving coherent cellular microtubule states. Elegant hand waving perhaps, but where is the model? How is it to be tested?