Techniques, devices, and systems may include screening effective therapies using cortical evoked potentials. In one example, a system may be configured to receive a first sensed cortical evoked potential of a patient that occurred in response to an induced sensation at an anatomical region different from a brain region of the patient and receive a second sensed cortical evoked potential that occurred in response to electrical stimulation delivered to one or more nerves associated with the anatomical region. The electrical stimulation may be at least partially defined by a set of therapy parameter values. The system may also compare a first value of a characteristic of the first sensed cortical evoked potential to a second value of the characteristic of the second sensed cortical evoked potential and determine, based on the comparison, efficacy of a therapy configured to treat a condition associated with the anatomical region.