** Shares of dorsaVi DVL.AX rise as much as 20% to A$0.054, their highest level since December 14, 2020

** Stock logs largest intraday pct gain since late July

** Motion analysis device maker signs a five-year sales deal with U.S.-based firm Select Medical to offer purchasing options for co's products across physical therapy centres

** About 23.3 mln shares change hands, 2.7 times the 30-day avg

** Stock up 325% YTD, including the session's moves

(Reporting by Anjali Singh in Bengaluru)

((anjali.singh2@thomsonreuters.com ))