The ability of the TM to support traveling waves suggests that its motion in response to sound may be more complex than previously believed. To investigate this possibility, we have studied responses of a wave model of the TM to distributed pressures predicted from a passive long-wave cochlear model. The resulting TM motions have a peak near the best frequency of the local BM drive, a notch at a lower frequency, and negative group delays at frequencies from well below to slightly above the best frequency. The negative group delays suggest that TM motion below the best frequency is dominated by the contribution of backward-traveling TM waves. Above the best frequency, forward-traveling TM waves dominate the response. These features are robust against variations in the wavelength and decay constant of the TM waves. Taken together, the notches in the TM magnitude response, negative group delays in the phase response, and increased sharpness of tuning are inconsistent with classical TM models. These phenomena can be explained in terms of TM waves propagating in both the apical and basal directions, highlighting the importance of modeling TM motion as a global wave phenomenon.