Chris Hupf, PT, DPT, CSCS
Do you ever feel a sense that you or your surroundings are spinning or moving? Do you experience bouts of sudden unsteadiness or dizziness? Vertigo is a type of dizziness defined as an illusory sensation of motion of either the self or the surroundings in the absence of true motion.1 According to the National Institute on Deafness and Other Communication Disorders, it’s estimated that close to 40% of the population will experience dizziness or balance problems over the course of their lifetime.2
One of the most common causes of vertigo is a condition called benign paroxysmal positional vertigo (BPPV). In fact, of the 5 million people in the United States who seek care for complaints of dizziness every year, between 17% and 42% end up receiving a diagnosis of BPPV.1
BPPV is a type of positional vertigo caused by a disorder of the inner ear. Those who have it experience repeated “spinning” sensations or unsteadiness when they move their head in a certain direction. This could occur when rolling over or getting out of bed or tipping the head back to look up. A feeling of lightheadedness and nausea can occur as well.
It’s widely understood that BPPV is caused by small calcium carbonate crystals that become dislodged from their normal resting place and end up free-floating within one of three semicircular canals used by the inner ear to sense movement. With changes in head position, these crystals migrate within the fluid-filled canal, causing movement of fluid and subsequent pressure changes that result in an abnormal sensation of rotation or spinning.