We start this morning with Oliver Sacks, who since Awakenings first stormed the bestseller lists (and the silver screen), has become an unlikely household name, and single-handedly invented the genre of neurological anthropology.
We see with our eyes, but we also see with our minds. Hallucinations is what he will be talking to us about today.
Oliver tells a story of an old lady who was “seeing things”. Who ended up being a perfectly sane and lucid lady, who had been very startled because she had been, “seeing things”. She had been completely blind, through macular degeneration for 5 years, but now was starting to see people in Eastern dress, cats, dogs, and a man with large teeth on one side of his face. Sometimes, she might hallucinate black and pink squares on the floor that go up to the ceiling. In her words, “It’s like a movie, a very boring movie.”
She was confused, and thought she might be going mad. She wasn’t, she had Charles Bonnet Syndrome: an anarchic visualization stimulation release.
10% of visually impaired people get visual hallucinations.
10% of hearing impaired people get hearing hallucinations.
As the visual parts of the brain aren’t getting as much input, they start to become hyperactive. Oliver tells us amazing stories of people what people see. Of boys flying up to 100 feet, men splitting into 6 parts and cartoons come to life.
Functional Brain Imagery (FMRI), has been possible in the last couple years. He tells us how the different parts of the brain are being activated and which are overactive for certain types of hallucinations, and it’s different parts that see teeth and eyes, from buildings, landscapes or cartoons.
He reminds us that blind people all over the world, many times have cases of hallucinations, yet they probably don’t share those with people for fear of being seen as crazy.
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