Debbie-hope this helps with an explanation.
Within the inner ear, there's a little pouch called the utricle that contains about 1,000 little pebbles made of calcium carbonate.
The tiny rocks serve an important purpose: They stimulate nerve cells when we move our heads — and send signals to our brain that guide our sense of up and down.
The trouble is that sometimes the little rocks fall off," explains Dr. Timothy Hain, a dizziness expert at Northwestern University. When the rocks fall into one of the inner ear canals, the brain gets confused. As the rocks roll around in the canal, the brain senses that the head is moving a lot more than it actually is. The result: vertigo.
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