The perils of wildfire smoke don’t stop at the lungs or the heart. They can also affect the brain. Recent research shows tiny particles from wildfire smoke — known as PM2.5, fine particulate matter — are so small they can travel deep into the lungs.But they don’t always end their journey there.Some slip into the bloodstream, or get to the brain directly through the nose, says Dr. Bhavini Gohel of the University of Calgary’s O’Brien Institute for Public Health.When toxins reach the brain, they can cause inflammation, resulting in fogginess, lack of focus and headache, she says.Increasing exposure to these…