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Perturbational Complexity Index (PCI)

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Applied IIT-based consciousness metric

By Adenauer G. Casali, Olivia Gosseries, Marcello Massimini, et al.

Summary

TMS-EEG measures brain response to direct perturbation. Conscious states (wake, dreaming, MCS) produce differentiated + integrated complex patterns. Unconscious states (VS/UWS, deep sleep, propofol) produce simple, local patterns. PCI = 0.31 threshold validated across 8 states.

Why It Matters

Closest thing to a "consciousness meter." Clinically validated. Operationalises IIT's Φ.

Notes

This entry is a seed import from the Phase 1 Knowledge Inventory. It has not yet been manually reviewed.