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Biomedical subjects

M Jastrzebski

Publications and source records attributed to M Jastrzebski.

At least 19 recordsLinked to original sources
PubMed1986

Polymelia in lamb.

Explore the source record for details and available documents.

Abnormalities, Multiple↗
PubMed1984

[Binuclear neurons in the brain of hens in experimental pesticide poisoning].

The material for studies consisted of brains of broilers at the age of 7 weeks. The chickens were experimentally intoxicated with doses of some pesticides or their mixtures. Brains were taken from dead animals of the experimental groups and control chickens, which were fixed in neutralized formalin solution, and, after dehydrating and embedding them in paraffin, they were cut with the microtome into sections stained with hematoxylin and eosin and according to Klüver Barrer's method. In the material studied the presence of single binuclear neurons was found in all regions of the brains. The number of such cells considerably increased in some regions of the brain (Purkinje cell layer of the cerebellum, hypermetropic nucleus, thalamus) of experimentally intoxicated chickens and dead ones after 12 - 24 hr from poisoning. The results of the studies suggest the possibility of neuron division in the central nervous system of birds under the influence of the action of a pathogenic agent - pesticides as regards this paper.

Animals↗
PubMed1984

[Lateral motor nucleus in the lumbosacral segment of the spinal cord of the horse].

Two medullae oblongatae of horses were cut into 15 microns cross-sections and stained according to the modified method of Nissel. The lateral motor nucleus lies in the lateral and median part of the ventral column of spinal cord grey matter. It adjoins medially nucleus motorius medialis of the spinal ventral column. Cells of this nucleus occur both along the whole lumbar and sacral segment of the spinal cord. In the lateral motor nucleus three cell groups are distinguished - median, basal and lateral. The latter is divided in some segments into subgroups - dorsal and ventral. Along the nucleus quite numerous constrictions and intervals are found, which are caused by various numbers of cells in particular cross-sections. Nucleus motorius lateralis is formed mainly of large and medium multipolar or single spindle cells.

Animals↗
PubMed1984

[Medial motor nucleus in the lumbosacral segment of the spinal cord of the horse].

The studies carried out on 2 spinal cords of horses showed that cells of the medial motor nucleus (nucleus motorius medialis) are present in all neuromers of the lumbar and sacral segment of the spinal cord. It lies in the medial part of grey matter of the ventral column, neighbouring laterally and ventrally with cells of the lateral motor nucleus, whereas dorsally with cells of the nucleus of the ventral commissural horn. Along the nucleus numerous constrictions and intervals are found, which are connected with various numbers of nerve cells in particular cross-sections.

Animals↗
PubMed1984

[Nucleus motorius lateralis in the lumbosacral segment of the spinal cord in horses].

Two medullae oblongatae of horses were cut into 15 microns cross-sections and stained according to the modified method of Nissel. The lateral motor nucleus lies in the lateral and median part of the ventral column of spinal cord grey matter. It adjoins medially nucleus motorius medialis of the spinal ventral column. Cells of this nucleus occur both along the whole lumbar and sacral segment of the spinal cord. In the lateral motor nucleus three cell groups are distinguished-median, basal and lateral. The latter is divided in some segments into subgroups-dorsal and ventral. Along the nucleus quite numerous constrictions and intervals are found, which are caused by various numbers of cells in particular cross-sections. Nucleus motorius lateralis is formed mainly of large and medium multipolar or single spindle cells.

Animals↗
PubMed1984

[Nucleus motorius medialis in the lumbosacral segment of the spinal cord in horses].

The studies carried out on 2 spinal cords of horses showed that cells of the medial motor nucleus (nucleus motorius medialis) are present in all neuromers of the lumbar and sacral segment of the spinal cord. It lies in the medial part of grey matter of the ventral column, neighbouring laterally and ventrally with cells of the lateral motor nucleus, whereas dorsally with cells of the nucleus of the ventral commissural horn. Along the nucleus numerous constrictions and intervals are found, which are connected with various numbers of nerve cells in particular cross-sections.

Animals↗
PubMed1980

Effect of methanabol (17 beta hydroxy-17 alpha methyl-1,4-androstadiene-3-one) on growth and breast muscle nucleic acid content in the chicken.

1. The effect of methanabol (17 beta hydroxy-17 alpha methyl-1,4-androstadiene-3-one) on growth and breast muscle nucleic acid in White Rock chickens grown to 8 weeks of age was tested. Methanabol was administered by mouth daily during this period at 0.05 mg/kg body weight in aqueous suspension to 30 birds, with appropriate controls. 2. Growth was significantly increased by methanabol. 3. Breast muscle RNA was significantly increased by methanabol but DNA was not affected.

Animals↗