silke appel-cresswell studies how bacteria in the gut play a part in the development of parkinson’s disease, a neurodegenerative disease.
“there is evidence that in one subgroup of the disease, there are symptoms in the gut decades before people develop the movement problems associated with parkinson’s,” says the associate professor for medicine and neurology at the
university of british columbia
. “we want to see what goes wrong with the gut,” she says.
it’s why she’s excited by a new
study
by danish scientists making the gut-brain connection, and theorizing that parkinson’s disease may not be one disease but actually two.
researchers discovered through the brain imaging of 37 patients that one group of patients had damage in the brain prior to damage in the intestines, and heart mri scans of other patients showed nervous system damage of the intestines and heart before the brain was affected.
they believe there are two subtypes of the disease: one is a brain-first (top-down) type, where a “pathology” begins in the brain and spreads to the autonomic nervous system, and a body-first (bottom-up) type, “where the pathology originates in the enteric or peripheral autonomic nervous system and then spreads to the brain,” according to the study. the researchers also found that
rem sleep behavior disorder
, in which people physically act out dreams, rather than remaining still during rem, is linked to the body-first type of parkinson’s.