犬の舌粘膜分裂線の加令的変化について

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In the past, many investigators have worked on the field of splitting lines, however their attention has been almost neglected on the subject of the irregular splitting lines. In 1957 a report by professor T. NAKAYAMA, M. D. was published which stated that the irregular splitting lines might be a direct functional manifestation which occurs as a defense reaction of the tissue. Hence, study was conducted on age changes and their relation to the splitting lines in the mucous membrane of the tongue. The muscular organs, tongues were obtained from 72 dogs of red and short hair type, from 60 days pre-natal growth to 14 years of age. The following summary contains the conclusions of the study : 1. It is possible to differentiate the splitting lines-system and the irregular splitting lines in the mucous membrane of the tongue. 2. The direction of the splitting line indicates the direction of its development. For the irregular splitting lines, it was assumed that there are two types : one is a result of friction of developing power and the other accompanies general tongue function. 3. The age changes of the splitting lines demonstrates aging process of tongue development. The differrential stages are : a. Pre-incipient growth stage (60 days pre-natal) b. Incipient growth stage (10-30 days post-natal) c. Rapid growth stage of transverse and thick development (2-6 months post-natal) d. Rapid growth stage of longitudinal development (7-11 months post-natal) e. Maturation stage (1-6 years post-natal) f. Atrophy stage (10-14 years post-natal) 4. It is a general occurance to have many resulting irregular splitting lines within the continuous lines system itself on the lingual mucous membrane. And this result is, the author thinks, based on the fact that the tongue is a very active muscle organ and is subject to polymorphic exercise.
九州歯科学会の論文
1969-05-31

犬の舌粘膜分裂線の加令的変化について

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