Exhibit 99.1

                             JOINT FILING AGREEMENT

     The  undersigned  hereby agree that  statements on Schedules 13G and/or 13D
and  Forms 3, 4 and 5 with  respect  to the  shares  of  common  stock of Acorda
Therapeutics,  Inc. and any amendments thereto signed by each of the undersigned
shall  be  filed  on  behalf  of  each  of the  undersigned  pursuant  to and in
accordance with the provisions of Rule 13d-1(k) promulgated under the Securities
Exchange Act of 1934, as amended. The undersigned hereby further agree that this
Joint  Filing  Agreement  may be  included as an exhibit to such  statements  or
amendments.  This  Joint  Filing  Agreement  may be  executed  in any  number of
counterparts,  all of which taken  together  shall  constitute  one and the same
instrument.


Dated: As of September 27, 2006


                                                          *
                                       -----------------------------------------
                                       Wayne Holman, individually


                                       Ridgeback Capital Investments Ltd.

                                                          *
                                    By: ----------------------------------------
                                        Name: Wayne Holman
                                        Title: Director


                                       Ridgeback Capital Management LLC

                                                          *
                                     By: ---------------------------------------
                                         Name: Wayne Holman
                                         Title: Managing Member



*By: /s/ Bud Holman
     -------------------------------
     Bud Holman, Attorney-in-Fact
     Power of attorney filed as an exhibit hereto