• Oliver Sacks
• Neurological anthropologist

• Speaking at TED2009
• February 2009
• Long Beach, CA

What hallucination reveals about our minds: Neurologist and author Oliver Sacks brings our attention to Charles Bonnett syndrome -- when visually impaired people experience lucid hallucinations. He describes the experiences of his patients in heartwarming detail and walks us through the biology of this under-reported phenomenon.