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-related changes in pro-inflammatory cytokines, acute phase proteins and cortisol concentrations in neonatal piglets. Neonatology 2007, 91 , 44-48. 13. Martin M., Tesouro M.A., Gonzalez-Ramon N., Piñeiro A., Lampreave F.: Major plasma protein in pig serum during postnatal development. Reprod Fert Develop 2005, 17 , 439-445. 14. Orro T., Nieminen M., Tamminen T., Sukura A., Sankari S., Soveri T.: Temporal changes in concentrations of serum amyloid-A and haptoglobin and their associations with weight gain in neonatal reindeer calves. Comp Immunol Microb Infect Dis 2006, 29 , 79

Abstract

Morphometric parameters of the lateral ventricle choroid plexus epithelial cells (average area, perimeter, bounding rectangle area, average nuclear area, nuclear perimeter, nuclear circularity and average nucleocytoplasmic ratio) were studied in postnatal and juvenile (10th, 16th and 38th postnatal days) 15 male and 15 female rats. The results were statistically analyzed by factorial ANOVA.

Mean values of epithelial cells area, bounding rectangle area and perimeter were significantly higher in 16 days old, than in 10 and 38 days old rats. Opposite to this, the nucleocytoplasmic ratio was lower in the 16 days old, than in 10 and 38 days old rats. Average nuclear area and perimeter showed similar trends, while nuclear circularity increased from the 10th to the 38th day. Significant sex differences were in the epithelial cells area, bounding rectangle area and perimeter, being higher in males than in females in both 16 and 38 days groups. Nucleocytoplasmic ratio was higher in 10 days old male rats, but lower in 16 and 38 days old male rats.

Generally, choroid epithelial cells size increased on the 16th and then decreased on the 38th day, but still remained higher compared to the 10th day. Nuclear size after increasing on day 16, also decreased on day 38, but to values lower than on day 10. The general decrease of nucleocytoplasmic ratio which accompanied these changes indirectly suggests a functional decrease. In the investigated period the male rat choroid epithelial cells were larger, but their nucleocytoplasmic ratio, which suggests the functional status, was lower than in females, indicating sex differences in the growth dynamics of the rat choroid plexus.

). Circ 1986;74:111-75. 20. Anversa P, Olivetti G, Loud AV. Morphometric study of early postnatal development in the left and right ventricular myocardium of the rat. Circ Res 1980;46:495-502. 21. Anversa P, Palackal T, Sonnenblick EH, et al. Myocyte cell loss and myocyte cellular hyperplasia in the hypertrophied aging rat heart. Circ Res 1990;67:871-85. 22. Anversa P, Palackal T, Sonnenblick EH, et al. Hypertensive cardiomyopathy: Myocyte nuclei hyperplasia in the mammalian heart. J Clin Invest 1990;85:994-7. 23. Chimenti C, Kajstura J, Torella D, et al. Senescence and

References Alvarenga A.L.N., Chiarini - Garcia A.H., Cardeal P.C., Moreira L.P., Fox- croft G.R., Fontes D.O., Almeida F.R.C.L. (2012). Intra-uterine growth retardation affects birth weight and postnatal development in pigs, impairing muscle accretion, duodenal mucosa morphology and carcass traits. Reprod. Fertil. Develop., 25: 387-395. Ashmore C.R., Addis P.B., Doerr L. (1973). Development of muscle fibers in the fetal pig. J. Anim. Sci., 36: 1088-1093. Beaulieu A.D., Aalhu s J.L., Williams N.H., Patience J.F. (2010). Impact of piglet birth weight, birth order

passerine development. J. Zool. Lond., 185, is. 2, 147-172. О’Connor, R. J. 1984. Th e growth and development of birds. Chichester, 1-315. Ricklefs, R. E. 1967. Relative growth, body constituents and energy content of nestling Barn swallows and Redwinged blackbirds. Auk, 84, 560-570. Ricklefs, R. E. 1968. Patterns of growth in birds. Ibis, 110 (4), 419-451. Ricklefs, R. E. 1975. Patterns of growth in birds. III. Growth and development of the Cactus Wrens. Condor, 77 (1), 34-45 Ricklefs, R. E. 1979. Adaptation, constraint and compromise in avian postnatal development. Biol

-generated radiological imagery of the structure of the spongious substance in the postnatal development of the tibiotarsal bones of the Peking domestic duck (Anas platyrhynchos var. domestica). Poultry Sci., 90: 830-835. Charuta A., Cooper R.G., Pierzchała M., Horbańczuk J.O. (2012 a). Computed tomographic analysis of tibiotarsal bone mineral density and mineral content in turkeys as influenced by age and sex. Czech. J. Anim. Sci., 57: 572-578. Charuta A., Dzierzęcka M., Czerwiński E., Cooper R.G., Horbańczuk J.O. (2012 b). Sex- and age-related changes of trabecular bone of tibia in

Summary

The granule cell domain of the cochlear nuclear complex contains interneurons, which are the targets for nonprimary auditory inputs from the superior olivary complex, inferior colliculus, auditory cortex, cuneate and trigeminal nuclei of the somatosensory system. The cellular targets of the non-primary projections are unknown due to a lack of information regarding postsynaptic profiles in the granule cell areas. In the present paper, we examined the synaptic relationships between a heterogeneous class of large synaptic terminals, called mossy fibers and their targets within subdivisions of the granule cell domain. During the late stage of postnatal development, we observed heterogenous groups of complex synaptic glomeruli. Using electron microscopy, we provide evidence for ultrastructural features of dendrites that receive input from the mossy fibers. The distinct synaptic relations between mossy fibers and dendrites of microneurons further imply fundamentally separate roles in processing of acoustic signals.