The impairment of repetition also has localization value. Its presence places the lesion firmly in the perisylvian region of the dominant hemisphere. Repetition defects are notably absent in the transcortical aphasias and in the so-called anomic aphasia, whose correlated lesion is located outside the perisylvian ring. Patients with the transcortical aphasias may actually repeat only too well, echoing the examiner’s words immediately after they are pronounced, often with little or no comprehension of what they are parroting.