GENERALIZED VIBROTACTILE ALLODYNIA IN A PATIENT WITH TEMPOROMANDIBULAR DISORDER

This report presents the findings from a psychophysical study of vibro tactile responses in a patient diagnosed with temporomandibular disord er (TMD). This patient unexpectedly reported pain due to innocuous vib rotactile stimulation, and this allodynia appeared to have a component of temporal summation. The pain response occurred not only in the reg ion of the clinical pain (the face), but also on the volar forearm, wh ere the patient reported no clinical pain. Administration of the N-met hyl-D-aspartate (NMDA) receptor antagonist dextromethorphan (DM), but not vehicle, attenuated the vibration-induced pain at both sites. (C) 1998 International Association for the Study of Pain. Published by Els evier Science B.V.