Blind-Spot Mapping, Cortical Function, and Chiropractic Manipulation

Steven Novella recently wrote about so-called “chiropractic neurology” and its most outspoken proponent, Ted Carrick.  In 2005 I published an article in The Scientific Review of Alternative Medicine (Vol 9, No 1, p. 11-15) entitled “Blind-Spot Mapping, Cortical Function, and Chiropractic Manipulation.” It was an analysis of a study Carrick had published. Carrick read a shorter,

Antioxidant Supplements for Macular Degeneration

Age-related macular degeneration (AMD) is one of the major causes of visual impairment in the elderly: it affects central vision, impairing the ability to read and recognize faces while preserving some peripheral vision. It comes in two forms: wet and dry. Dry macular degeneration is by far more common, but wet macular degeneration, involving the

Blind Spot Mapping: A Dubious Aspect of “Chiropractic Neurology”

Several hundred practitioners, mostly chiropractors, are offering a simple paper-and-pencil test that they say can tell how your brain is functioning [1]. They call it “blind spot mapping,” “brain function testing,” “brain mapping,” or “cortical mapping.” They claim that this test can detect an enlarged blind spot in one eye, that the enlarged blind spot

Blind Spots, Brain Maps, and Backaches: A New Chiropractic Delusion

My trip down the rabbit hole started when an ad in the newspaper caught my eye: “Do you have a good brain or a bad brain? One simple test may tell you… call today for a free brain exam.” I started to worry. I had always thought I had a pretty good brain, but what

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