Jackson, who hails from nearby Cleveland, suffered the injury late in practice after a pile-up with several other players.
Oddly, Jackson suffered a similar injury last season in the final minute of a 75-40 rout of Saint Louis in the San Juan Shootout on Dec. 1, 2003. She missed two and one half weeks due to the injury that time.
''Brittany will undergo further diagnostic testing this week,'' said head women's athletics trainer Jenny Moshak, ATC. ''We will begin her course of rehabilitation immediately.''
Jackson has started eight games for the 21-2 Tennessee Lady Vols this season. She is averaging 8.7 points and 2.2 rebounds per game.
Four games remain in UT's regular season, with the SEC Tournament to follow in two and one half weeks.