Years after cruise, woman still feels rocking.(Main)

Byline: ELIZABETH SVOBODA - New York Times

When 71-year-old Marilyn Josselyn finished a weeklong cruise on the Volga River in Russia with her husband, Roger, in 1998, she expected to feel like a bobbing buoy for a little while after returning to land.

"I felt a rocking sensation, but I thought it was just the usual kind of thing," she said. But when the feeling persisted for weeks, then months, she began to realize something in her brain was truly off kilter.

A smorgasbord of doctor-recommended treatments followed, including medication and vestibu lar therapy for patients with dizziness. "They'd have me stand in front of a chair, turn around as fast …