Fourth: Lesions of the lateral-frontal region produce more or less marked aphasic disorder, just as do those of the inferior part of the precentral gyrus. This aphasia is more apt to occur when the wound is deep. However, no case of permanent aphasia has been observed in cases of lesion of the lateral-frontal region (termed in Foix’s nomenclature, the precentral region, but referring to the tissues in front of the precentral (or ascending frontal) gyrus of the more familiar nomenclature). Almost absolute, or absolute, anarthria follows the wound, and the patient is hemiplegic. This hemiplegia may last from ten days to two or three months. After a time there is no longer more than a slight dysarthria, and writing becomes good again; reading remains, perhaps, a little difficult. A complete or almost complete cure is the rule. Fifth: When the retrocentral region is injured, various aphasic syndromes appear. The retrocentral region is the parietal-temporal lobe except the superior part of the parietal lobe and the anterior part of the temporal lobe, which latter two regions when injured do not allow any marked aphasic disorder. Lesions of the middle or posterior temporal region are particularly important for speech, and produce more marked disorder than lesions of the angular gyrus or the supramarginal gyrus. At first, words cannot be spoken, for a period of a fortnight to three months. Speech returns progressively, with an increased power of comprehension. At the same time, the patients begin to read and write. But there is no further spontaneous progress after a period of six or eight months, and then special reëducation must be started. These speech disorders of retrocentral (parietal-temporal) origin are either aphasic syndromes or slight remains of psychical disorders, or again, a disorder practically limited to alexia. The true aphasic syndromes concern the spoken word, understanding the words, writing, and calculation. The disorder is not especially dysarthric and consists particularly in loss of vocabulary. It might be called an amnestic aphasia (Pitres). These cases have well-marked intellectual disorder and their power of calculation is especially poor. As to the aphasic traces, which are more important to understand than they are extensive in point of fact, they relate particularly to calculating power, to vocabulary (slowness in finding words), and to reading (reading without comprehension). As to the cases of alexia, these are cases of lesions of the posterior part of the parietal-temporal lobe, and are usually accompanied by a hemi- or a quadrantanopsia.