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Biomedical subjects

P Rother

Publications and source records attributed to P Rother.

At least 55 records · Page 3Linked to original sources
PubMed1975

Morphometrical and mathematical analysis of the ageing changes of the muscle-connective-tissue-relation in smooth muscles.

The rate of the process of ageing studied in this work as well as of other ageing processes observed by us constantly decreases with increasing age. By an adaptation of exponential functions to series of measurements it is possible to estimate the theoretically possible end stage of histological ageing processes for extremely long lifetimes. The histological biomorphosis is much slower in female persons during their generative phase than in males. Results of planimetric measurements made on sections suggest that, so far as the shift in muscle-connective tissue relation in favour of the connective tissue is concerned, primary significance should be attached to muscular atrophy, while the connective-tissue proliferation may be considered to the secondary in this respect.

Adolescent↗
PubMed1975

[Sex differences in the human sternum].

We investigated 14 male and 14 female breast-bones of adult human beings by measuring 2 parameters of length, 2 of breadth and 2 of thickness and estimated their frequency distributions. They overlap more or less. Therefore we made a discriminant analysis in order to differentiate male and female skeletons by means of a-l 6 measures of the breast-bone. The result was satisfying. The received discriminant function may be used in the sex diagnosis in forensic osteology, especially, if the more reliable criterions of the pelvic measures are missing.

Anthropometry↗
PubMed1975

[Stereological studies of aging changes in epiglottal cartilage cells].

The topic of these investigations were the aging changes of stereological parameters of the cells in human epiglottal cartilage. 42 sagittally cut epiglottides of all ages were available. By means of a drawing mirror in total 8937 cells had been drawn from the slide on paper and then measured. In detail we determined the volume fraction of cartilagous cells in the total cartilage volume, the complete cell surface area of the cartilage, the surface-to-volume ratio of the cartilagous cells, the numerical density of the cells and their volumes. The results are as follows: 1. The volume fraction of cartilagous cells in the total cartilage volume decreases from birth to senium continuously and, with the exception of a more rapid decline during the first decade, linear too. 2. The collective cell surface area per constant test volume of cartilage shows an exponential decline during life. 3. The surface-to-volume ratio of the cartilagous cells decreases very intensively during the first decades, from the 5th decade it little ranges again. 4. In the same way the numerical density of cells intensively decreases up to the 5th decade, but later on it ranges again. 5. The several volumes of cells show from the age of the newborn up to the 40th year a linear steep rise and afterwards, up to senium, an unequivocal decline. 6. The sizes of the cartilagous cells are not normally distributed, on the contrary, in young slides more than in older ones, one size class very predominates.

Adolescent↗