Tatarstan scientists counted people with a lowered cerebellum
Arnold-Chiari malformation of the first type means the descensus of the tonsils of the cerebellum into the large occipital foramen of the skull. Among the symptoms of the disease are headache, nausea and vomiting coupled with cough, tremor, an impairment of sensitivity and tone of the muscles.
The study showed that in the northern regions of Tatarstan the disease occurs in 30 cases per 100,000 people (average on the planet — 3,3−8,2 cases per 100,000). The scientists found a connection with the nationality — there was an average of 70% of the Tatars among the patients, while the Tatars make up just 54% of the population of the Republic. The data of Kazan doctors suggest that certain variants of genes that are more common in Tatars can play a role in the emergence of CMs.