A Chiropractical is a monthly video, on VHS or DVD, containing 17
minutes' worth of clips with entertainment and information pertaining to
chiropractics in general and your office in particular. The video clips are
soundless, so they do not conflict with whatever in-office music or quiet you
may prefer.
The general clips include health tips, definitions, and trivia, all geared
toward the current month.
Here's a sample definition, explaining subluxations: