Tag Archive for cognitive scaffolding

Information Architecture: Building Mental Castles

Prosopagnosia and Topographical Agnosia Not all memory structures are created equal. Humans have an amazing variability in our capacities to commit information to memory and to use this information flexibly to achieve our certain goals. Consider facial memory: our ability to remember a face even when out of context of original interaction. Like all cognitive abilities, facial recognition spans the continuum: there are people who basically lack this capacity (Oliver Sacks, a famous neurologist who wrote “A Man Who Mistook His Wife for a Hat” and “Awakenings” is one such example.) and then there are those who “never forget a face.” Most us are somewhere in between. I’m, personally, worse than most but perhaps not as bad as Dr. Sacks. (I taught science at a local elementary school, and to this day people stop me on a street and greet me in a very familiar way while I haven’t a slightest idea of who they are, never mind their names—very disconcerting.) The condition of being a lousy face recognizer is called Prosopagnosia and it tends to come with a complimentary Topographical Agnosia (or inability to identify places and thus having bad navigational skills). If you don’t remember faces and places,…

Neuro-Parasites & Problem Solving Errors

Dr. Robert Sapolsky is a professor of neurobiology at Stanford University. He started his career studying baboons, charting the relationship between stress hormones and an individual animal’s social ranking in the baboon society hierarchy. The lower the rank, the more stress the animal experiences, the more consequences there are to the health outcomes and longevity of the baboon. Making a parallel to human society, the conclusions of Dr. Sapolsky’s study is that it sucks to be at the bottom of the social order. In his books “Primate’s Memoir” and “Zebras Don’t Get Ulcers,” Dr. Sapolsky provides copious details of his work and his conclusions. (see Recommended Books for details) But residing on the bottom of the social ladder is not the only problem a mammal like us can experience. In his video interview with Edge (www.Edge.org), Dr. Sapolsky describes the adventures of Toxoplasma–a protozoan parasite carried by cats which causes an infection Toxo–in our amygdala. Post an active infectious state, Toxo is able to manipulate human dopamine levels. People with the post-Toxo infection have higher than normal dopamine levels, resulting in some interesting cognitive consequences. There’s been solid research that documents a high level of Toxo infections in schizophrenic patients. There…