Magnetically channeled accretion in T Tauri stars : a dynamical process - To appear in Open Issues in Local Star Formation, Astrophysics and Space Science Library, vol. 299, pag. 147-158 (2003), Kluwer Academic Press, eds. J. Lepine, J. Gregorio-Hetem

We review observational evidence and open issues related to the process of magnetospheric accretion in T Tauri stars. Emphasis is put on recent numerical simulations and observational results which suggest that the interaction between the stellar magnetosphere and the inner accretion disk is a highly time dependent process on timescales ranging from hours to months.

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