Handbook of insanity for practitioners and students . occipital lobes are mainly atro-phied. If the brain is imperfectly developed as a whole,as in some idiots, there can be no question of is any further conclusion warranted from irregulardevelopment in the cortical layers, unless it is circum-scribed. For example, in a few idiots the frontal lobescontained only very narrow pyramidal cells, which weredistributed irregularty, so that it was almost impossibleto distinguish the layers. Here the imperfect mental de-velopment may be attributed to the imperfect developmentof the fro
Handbook of insanity for practitioners and students . occipital lobes are mainly atro-phied. If the brain is imperfectly developed as a whole,as in some idiots, there can be no question of is any further conclusion warranted from irregulardevelopment in the cortical layers, unless it is circum-scribed. For example, in a few idiots the frontal lobescontained only very narrow pyramidal cells, which weredistributed irregularty, so that it was almost impossibleto distinguish the layers. Here the imperfect mental de-velopment may be attributed to the imperfect developmentof the frontal cortex. Description of Figs. 3, 4, and 5, which are made according toEckers brain-scheme, with the aid of the literature of the locali-zation question. 10 HANDBOOK OF INSANITY. The dotted line gives a schematic posterior boundary of theapperception organ in the frontal brain, and the anterior boundaryof the perception organ in the occipital and parietal lobes. Thisline incloses the centro-motor region. These three tracts coincide AH^cerebrimedu. approximately with the areas of distribution of the anterior, pos-terior, and middle cerebral arteries. The fact that the centres for ci»J£C^-
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