Figure 4From: Trigeminal Electrophysiology: a 2 × 2 matrix model for differential diagnosis between temporomandibular disorders and orofacial pain Motor evoked potentials of the trigeminal roots in Orofacial Pain. The figure shows the evident symmetry in the amplitude of the motor evoked response by transcranial electrical stimulation of the trigeminal roots in a patient complaining of orofacial pain erroneously interpreted as bruxism.Back to article page