Christof Koch
Christof Koch (born 1956) is a German-American neuroscientist and chief scientist of the MindScope Program at the Allen Institute for Brain Science, best known for his decades-long collaboration with Francis Crick on the neural correlates of consciousness and for championing integrated information theory (IIT) as a scientific framework for explaining conscious experience.
Neural correlates of consciousness
Koch and Crick pioneered the empirical search for the neural correlates of consciousness (NCCs) — the minimal neural mechanisms sufficient for any specific conscious experience — beginning in the early 1990s. Their approach treated consciousness as a tractable scientific problem, focusing on the visual system as a model domain, and produced foundational hypotheses about the role of attention and high-frequency neural oscillations in conscious awareness.
Integrated information theory
Koch is the principal scientific champion of integrated information theory (IIT), developed by neuroscientist Giulio Tononi, which holds that consciousness is identical to integrated information (Φ, or "phi") — a measure of how much a system's parts communicate with and constrain each other above and beyond their independent activity. IIT implies panpsychism — that consciousness is a fundamental, graded property of physical systems, present wherever information is integrated, including in simple organisms and potentially certain physical substrates.
Expanding consciousness
Koch has explored psychedelic states, meditation, and altered states as tools for probing the boundaries and mechanisms of consciousness. He argues that understanding how consciousness expands or contracts under different conditions is essential to a complete scientific account of mind.