title: [Further studies of the cytoarchitectonic division in the dorsal surface of the lst temporal gyrus of a linguistic genius and 2 anthropoids].
abstract: 1. As an addition to already published studies in this journal (BEHEIM 1974) about the cytoarchitectonic divisions in six left human dorsal surfaces, the left and the right dorsal surface of a linguistic genius and of two anthropoids were examined; a second human right dorsal surface was used for a comparison. 2. In all these cases it was possible to confirm the presented in the first article dividing characteristics of the described partitions of the cortex in spite of considerable cytoarchitectonic differences between individuals, as well as, between left and right dorsal surfaces. 3. The linguistic genius (El 9) showed on the left side a striking development of the 2d transverse gyrus by the repetition of two fields and threefold increase of the most interior field of the medial segment with the smallest nerve cells of the tr 2. 4. On the right side El 9 revealed, besides a considerable narrowing of the caudal part of the lst transverse gyrus in the 2nd transverse gyrus, only division into two parts of the medial segment of the gyrus; the most interior field was missing. The caudal field of the tr 2 and regio t par tr were large in comparison with the left side. A similar picture was presented by the right dorsal surface in the case of the highly musical scientist (El 2) in whom the left tr 1 was especially extensive. In both right dorsal surfaces the nerve cells of the tr 1, especially in markedly narrowed caudal part, were very small; the nerve cells of the tr 2 - exclusive tr 2 c - were smaller than on the left side - as much as it was possible to judge without comparative microphotographs; the nerve cells of the tr 2 c appeared to correspond to that on the left side. In regio t par tr the nerve cells, practically of "normal" size, were so severely damaged that it could not be topographically differentiated. 5. In both anthropoids, the topography of the dorsal surfaces was similar to that of the man; in both left sides area tr 1 c could not be subdivided; on the right side the differentiation between the subareae of tr 1 i and tr 1 c was even not possible. In tr 2 on both sides it was possible to divide in two the middle part of the gyrus similarly as in examined human right side; in addition there was a conspicuous extension of the lateral and caudal area of the tr 2. 6. The literature concerning the left-right differences in the dorsal surfaces and about the sensory primary auditory cortex is quoted and discussed.
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D002648:Child; D000882:Haplorhini / Q000033:anatomy & histology*; D006801:Humans; D007360:Intelligence; D007802:Language; D008297:Male; D008875:Middle Aged; D008953:Models, Anatomic; D002679:Pan troglodytes / Q000033:anatomy & histology*; D011323:Primates / Q000033:anatomy & histology*; D013702:Temporal Lobe / Q000033:anatomy & histology*
vernacular_title: Weitere Untersuchungen zur cytoarchitektonischen Gliederung der Dorsalfläche der 1. Temporalwindung bei einem Sprachgenie und bei zwei Anthropoiden