Consciousness and the Brain: Deciphering How the Brain Codes Our Thoughts — Stanislas Dehaene — 2014

Dehaene explains how consciousness arises from brain activity using experiments and brain imaging. He shows that conscious experience occurs when information becomes globally available in the brain, identifying measurable “signatures” of awareness and turning consciousness into a testable, scientific phenomenon.

1. How We Define and Study Consciousness

2. How Consciousness Works in the Brain

3. What Consciousness Does

4. Why It Matters: Consciousness Can Be Measured and Applied

⭐ Star Facts — Consciousness and the Brain (Stanislas Dehaene)

• Consciousness can be studied scientifically using experiments and brain imaging
• The most useful definition is “conscious access”—what you can report, think about, and use
• The brain processes far more unconsciously than consciously
• Conscious vs. unconscious perception can be tested using the same stimulus under different conditions
• Conscious perception triggers a “global ignition”—widespread, synchronized brain activity
• Unconscious processing remains local, weak, and short-lived
• Consciousness is a network event, not a single location in the brain
• A system of long-range connected neurons enables global information sharing
• Consciousness allows for reasoning, planning, language, and flexible behavior
• Unconscious processes can influence behavior but cannot be reported or flexibly used
• Subjective reports (what people say they experience) are valid scientific data when controlled
• Consciousness is limited in capacity—only a small amount of information is accessible at once
• The brain is constantly active, producing a “stream of consciousness” even without external input