I accidentally found Judy Carmichael on 91.3 this afternoon, and damn glad I did. She's the host of "Jazz Inspired" radio show, and she performs as a musician.
Judy's well-known for her stride piano style; no less a personage than Count Basie nicknamed her "Stride."
This is a pretty good video where he details the elements of stride, and you can hear the connection between ragtime, jazz, boogie-woogie, and other styles. I've heard that boogie-woogie came about from pianists being too fat to stride very far on the keyboard. Don't know how true that is, but it makes a good story.
Here's Dr. John playing a boogie-woogie tune that you can see the connection in. You can see for the most part that while his left hand is quite busy, it's in a much narrower range than if he were striding.