Motor Evoked Potentials after Supraspinal Stimulation in Pre- and Postoperative Evaluations of Patients with Cervical Radiculopathy

Figure 4

Recordings of root-motor evoked potentials (MEP) induced by a magnetic field, performed bilaterally (a) in a healthy volunteer and (b) in a patient with disc-root conflict. What must be noted in the case of the patient is the asymmetry of responses induced from the same muscles on the right and left sides, expressed by a reduction in amplitude or a prolonged latency parameter.

(a)

(b)