[Quantitative analysis of cell density and pattern of chondrocytes in transitory hyaline cartilage anlagen of human tarsal bones].
Changes in the distribution patterns of chondrocytes in the embryonic transitory hyaline cartilage of the tarsus were studied using 56 sagittal section of tarsi from 28 human embryos, with a vertex-foot length from 7.0 to 44.0 cm. The os naviculare and os cuboideum were not sliced in all sections. A total of 93,931 cells were transferred via a mirror to paper, and the resulting patterns were analyzed. Determinations included the numerical surface and volume density of the chondrocytes and the cell distribution patterns using the dispersion index. In the case of the calcaneus, talus, os naviculare and os cuboideum, the number of sliced cells found over a constant area decreases at a continuous linear rate in the course of the embryonic period. In all tarsal primordia the distribution pattern developed from regular to random. Particular conditions prevail immediately below the perichondrium and near the ossification centers which can be found in the calcaneus from the 6th month onwards.
Institut für Anatomie des Bereiches Medizin der Karl-Marx-Universität, Leipzig, DDR.
P
P
Rother
T P
TP
Ranke
F
F
Forriol
J
J
Banusch
L
L
Bauer
D000842:Ankle / Q000196:embryology*; D002356:Cartilage / Q000166:cytology / Q000196:embryology* / Q000378:metabolism; D003720:Densitometry; D006801:Humans; D006818:Hyalin / Q000378:metabolism*; D013997:Time Factors
Quantitative Analyse der Knorpelzelldichte und des Chondrozytenmusters im transitorischen hyalinen Knorpel der embryonalen Anlagen menschlicher Fusswurzelknochen.