CALGARY -- Astronauts headed to the International Space Station in 2018 won't only be conducting their own experiments -- they'll be part of a bigger experiment themselves.

The Canadian Space Agency and the University of Calgary are collaborating on a new experiment to study how long-duration missions impact astronauts' brains.

Known as wayfinding, the study will examine how reduced gravitational forces affect the astronauts' ability to find their way around.

Studies have already shown that spending extended time in space can reduce bone density.

Canadian astronaut David Saint-Jacques will begin his six month mission in late 2018.

He says he doesn't mind being a guinea pig if it can help treat people suffering from neurological conditions.