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