We present the case of a patient suffering from prosopoagnosia (PA). The MRI, performed at the onset of the disease, showed a lesion, strictly confined to the right temporo-occipital region; whereas the computerized EEG documented a functional impairment of the posterior regions of both hemispheres. A control performed two months later indicated a partial recovery of the neuropsychological deficit coupled with an improvement of EEG abnormalities, which was more prominent on the left side. The usefulness of functional studies in order better to comprehend the anatomical substrates of PA and their prognostic value are briefly discussed.