Vol. 45, No. 1 Supplementum, 2001 content next

THE MORPHOLOGICAL PICTURE OF M. GASTROCNEMIUS IN JAPANESE QUAIL CHICKS HATCHED ON THE ORBITAL STATION "MIR"

Kočišová, J., Cigánková, V., Zibrín, M., Tomajková, E., Lenhardt, Ľ., Sabo, V.*, Boďa, K.**, Dadasheva, O. A.***, Guryeva, T. S.***

University of Veterinary Medicine
Komenského 73
041 81 Košice
The Slovak Republic		 * Institute of Animal Biochemistry and Genetics SAS
900 28 Ivanka pri Dunaji
The Slovak Republic		 ** Research Institute of Veterinary Medicine
900 28 Ivanka pri Dunaji
The Slovak Republic		 *** State Scientific Centre - Institute of Biomedical Problems
76A Khoroshevskoye shosse
Moscow 123007
Russia

Summary

The striated musculature of the m. gastrocnemius of newly-hatched Japanese quail chicks was rarely fully differentiated: for the most part, there were regularly arranged sarcomeres with regular I and A strips and marked Z lines, which had sporadically irregular and doubled courses. The intermyofibrillar spaces were oedematous with numerous osmiophil granules, ribosomes and glycogen.
In some cases, there were oedematous, dilated tubules of the sarcotubular apparatus. Mitochondria took various shapes from round to oval. The internal membranes were dense, but in some cases vacuolized. For the most part, they were accumulated on the larger areas or joined into long formation overlapping one sarcomere. In the sarcoplasm there were also numerous lipid droplets.
The light-microscopical picture of the striated musculature in the experimental group was marked with a regular striation and the myofibrils were accumulated into bundles on the transverse section. The muscular fibres had numerous nuclei located on the periphery of the fibre close under the sarcolemma.
In the control laboratory group, the m. gastrocnemius was entirely developed: sarcomeres with alternating I and A strips and regular Z lines ran regularly. The mitochondria had rich internal membranes and the sarcotubular apparatus did not manifest any signs of dilatation. There were sporadically lipid droplets.

Key words: Japanese quail chicks; m. gastrocnemius; flight experiment; morphology

References

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Folia Veterinaria / 2001