E0030497

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ツパイ リスザル ショウノウ ノ ヒカク カイボウガクテキ ケンキュウ

Comparative anatomical studies on the cerebellum of the tupai and the loris

Japanese (日本語)

Medical journal of Kobe University

41(2)

185-208

1980-03

The cerebellar foliae of the prosimiae are subdivided from the medullary laminae and body. For this purpose, in 6 cases of the tupai and 1 case of the loris, the myelin sheath stained 40μ thick sagittal series and the reconstruction models as the subsidiary guide are made. Results are as follows. 1) The cerebellar foliae are divided into 10 subdivisions (I to X) in the vermian part and 6 subdivisions (VH to XH) in the hemispheral part and VIH to IXH are divided moreover two portions namely A and B. 2) As compared with those of the tupai, the branching off or sprouting from the declive (V), folium vermis (VI) and the pyramis (VIII) are barely complex in the loris. 3) The lobulus simplex is only one surface folia in the tupai but 2 in the lorls. 4) The hemispheral portion (VIH) of the folium vermis (VI) namely the lobulus semilunaris superior corresponds to the lobulus ansiformis and is divided to the crus I(VIHB) and the crus II (VIHA) by the intercrural sulcus. The crus I and II respectively consist of 3 and 2 in the tupai and 2 and 3 to 4 in the loris 5) The hemispheral portin (VIIH) namely the lobulus semilunalis inferior in a broad sense of thetuber vermis (VII) and the hemispheral portion (VIIIH) that is the lobulus biventer form the paramedian lobule. The lobulus paramedianus is divided to three portions namely the anterior, middle and posterior portion. The anterior portion in the lobulus semilunaris inferior in a narrow sense and consists of 2 to 4 in the tupai and 3 in the loris. The middle portion is the common medullary lamina made by the union of the lobulus gracilis (VIIHA) with the rostral half (VIIIHB) of the lobulus biventer (VIIIH) and branches off VIIHA and VIIIHB at its apical part. The lobulus gracilis and VIIIHB, namely the rostral half of VIIIH are only one surface folia respectively in each case. The posterior portion is the caudal half (VIIIHA) of the lobulus biventer (VIIIH) and consists of two surface foliae in the loris and 1 to 2 in the tupai. 6) The paraflocculus (IXH) grows from the caudal part and the caudal third of the ventral part of the cerebellar body. After the cerebellar body is divided to the dorsal and ventral cerebellar body, the dorsal and ventral paraflocculus sprout from the dorsal surface and the ventral surface of the ventral cerebellar body respectively. The dorsal paraflocculus consists of 3 to 4 surface foliae in the tupai and 1 to 2 in the loris and the ventral paraflocculus 1 to 2 in the tupai and 2 in the loris 7) The flocculus (XH) develops predominantly in the prosimiae and sprouts from the middle third of the ventral surface of the cerebellar body and elongates along the cerebellar peduncle from its ventrocaudal surface to its rostrodorsal surface. The flocculus consists of 4 to 7 surface foliae in the tupai and 5 to 7 in the loris

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