[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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The specific somatic sensory projection from the feline face to the third somatosensory, area S_III, in the anterior suprasylvian gyrus adjacent to the ansate sulcuswas investigated with single unit recording technique.
Cats were anesthetized with either a-chloralose or pentobarbital sodium.
1. The cell population responding to ‘tactile’ cutaneous stimulation of the face within S_III had similar static functional properties to those in S_I and S_II. Most neurons observed had receptive fields restricted in size and were mode specific. Their receptive fields were mainly contralateral, although some had an ipsilateral extension.
2. Unitary analysis of somatotopic pattern in S_III was simplified by the columnar organization that the receptive fields of Sin neurons identified along an electrode penetration at right angle to the cortical surface were very silimar in location.
3. Somatotopic organization was demonstrated in Sin:(a) The upper half of thecontralateral face is represented ventrally.(b) The lower part of the face projects dorsally.(c) The contralateral neck is represented rostrodorsally.(d) Many cells along the posteroventral margin of Sm have receptive fields with a definite ipsilateral extension across the midline.

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Clinical and laboratory studies have repeatedly indicated the importance of oral bacteria in the initiation and progression of dental caries, periodontal disease and their sequelae, i.e., periapical lesions. However, localization of these bacteria in human tissue especially in the periapical lesion has remained unclear.
The present study was made to clarify the localization of cellular components of oral bacteria (Staphylococcus, Streptococcus, Bacterionema, Bacteroides, Fusobacterium and Corynebacterium) with a fluorescent antibody technique and other conventional staining techniques.
Of 74 subjects, 41 were diagnosed as apical abscess, 23 as apical granuloma, and 10 as apical cyst by conventional staining methods. By a fluorescent antibody technique, 61 of 74 subjects were fluorescence positive. Of these 61 subjects fluorescein-labeled anti Bacterionema, Corynebacterium, Bacteroides, Staphylococcus, Streptococcus and Fusobacterium sera proved to be fluorescence positive in 54, 53, 40, 38, 35 and 34 subjects, respectively (Table 5). This specific fluorescence was usually observed as a bacterial mass and 1 or in the cytoplasm of macrophages and in polymorphonuclear leukocytes (Fig. 2, 3). These specific fluorescence were usually seen both in the central necrotic area and granulation tissue of apical abscess (Fig. 4, 5, 6), granulation tissue in apical granuloma (Fig. 9), and intercellular space of connective tissue wall in apical cyst (Fig. 11, 12).
From the above data, it is indicated that the initiation or the process of chronic apical periodontitis is related with oral bacteria.

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