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1

The volume fraction of brain ventricles to total brain volume: a computed tomography stereological study

100%
Akdogan I., Kiroglu Y., Onur S., Karabulut N.
Folia Morphologica
|
2010
|
tom 69
|
nr 4
This study has been designed to estimate the volume fraction of the brain ventricles volume to total brain volume and to correlate them with gender and age in normal subjects. Cranial computed tomography (CT) images of 80 normally evaluated subjects (five female and five male for each decade) were selected from 1,073 CT examinations. The volumes of total brain, cerebral aqueduct, fourth, third, and lateral ventricles and their ratios were estimated using the Cavalieri method and volume fraction-stereological methods. The ratio of total brain ventricle volume to total brain volume was comparable between the two genders (p > 0.05, independent t test). Mean volume fraction of total ventricle volume to total brain volume was found to be 1.21% in the first and 3.37% in the last decades. Mean volume fraction was found to increase significantly with age (p < 0.01, r = 0.630, Pearson). In conclusion, the mean percentage of total ventricle volume within the total brain volume was found to be 2%. We demonstrated the volume fraction of total ventricle to total brain in normal subjects. Total ventricle volume to total brain volume fractions can be important tools in determining ventricle volumes, which denote variability in some diseases (Alzheimer, schizophrenia, neurodegenerative disorders, etc.) and can be estimated by stereological methods. (Folia Morphol 2010; 69, 4: 193–200)
2

Design based stereological methods for estimating the total number of objects in histological material

100%
West M. J.
Folia Morphologica
|
2001
|
tom 60
|
nr 1
The principle that formed the basis of the most popular “assumption based” stereological methods for counting cells that were available prior to the advent of the more recently developed “design based” methods will be described in general terms. The major weaknesses inherent in the older methods will be described, along with how they have been eliminated by the design based methods.
3

Antidiabetic effects of Eucalyptus globulus on pancreatic islets: a stereological study

86%
Mahmoudzadeh-Sagheb H., Heidari Z., Bokaeian M., Moudi B.
Folia Morphologica
|
2010
|
tom 69
|
nr 2
The leaves of Eucalyptus globulus (eucalyptus) are used for the treatment of diabetes mellitus in traditional medicine. The aim of this study was to evaluate the effects of eucalyptus on streptozotocin (STZ)-induced damage in pancreatic islands by stereological methods. Fifty mature normoglycaemic male Wistar rats, weighing 200–250 g, were selected and randomly divided into 5 groups (n = 10): control; STZ-induced diabetic (D) — by intraperitoneal injection of 60 mg/kg streptozotocin; treated control (TC); and treated diabetic (TD₁, ₂), respectively, received 20 and 62.5 g/kg of eucalyptus in their diet, and 2.5 g/L aqueous extract of eucalyptus in their drinking water from one week after induction of diabetes. After four weeks of the experiment, stereological estimation of volume density and total volume of islets and beta cells, volume-weighted mean islet volume, mass of the islets and pancreas, and total number of islets were carried out. Administration of eucalyptus significantly decreased the weight loss and increase of water and food intake in the treated diabetic groups in comparison to the STZ-induced diabetic (D) group. Volume density and total volume of islets, volume-weighted mean islet volume, mass of islets, and mass of pancreas of both treated diabetic groups were higher than the D group. In TD₂, these stereological parameters increased significantly compared to the D group (p < 0.001). Volume density and total volume of beta cells increased 21% and 65%, respectively, in the TD₂ group, but it was not statistically significant compared to the diabetic group (p > 0.05). The results suggested that Eucalyptus globulus with a dose-dependent manner ameliorates diabetic states by partial restoration of pancreatic beta cells and repair of STZ-induced damage in rats. This study suggests a beneficial effect of eucalyptus in the treatment of diabetes. (Folia Morphol 2010; 69, 2: 112–118)
4

Qualitative and quantitative differences in the motor and somatosensory cortical projections of the rat claustrum - combined retrograde transport and stereological studies

86%
Kowianski P., Morys J., Sadowski M., Dziewiatkowski J.
Folia Morphologica
|
2000
|
tom 59
|
nr 2
Using axonal retrograde tracing, combined with morphometric analysis, we compared the distribution and number of claustral neurons projecting to the motor and somatosensory cortical areas in the Wistar rat. Comparable volumes of the retrograde tracer Fluoro-Gold, were injected into the motor or somatosensory cortices. Injections into these areas resulted in labeling of neurons along the entire length of the claustrum. Neurons retrogradely labeled after injection into the motor cortex prevailed in the anterior part of the claustrum, whereas those projecting to the somatosensory cortex predominated in the central part. The mean number of claustral neurons retrogradely labeled after tracer injections into the motor cortex significantly outnumbered that from the somatosensory cortical area (p<0.01). Similarly, the mean value of the numerical density of the retrogradely labeled neurons was significantly higher for the motor projection zone in the claustrum, than for the somatosensory projection zone (p<0.001). The contralateral claustral projections, both into the motor and somatosensory cortices, were considerably lower in number than the ipsilateral ones. These findings indicate that: (1) the claustral projections to the various cortical regions seem to be differentiated (2) the distribution of claustral neurons projecting to the motor and somatosensory neocortical areas shows an anteroposterior gradient, (3) the claustrum of the rat appears to be more closely related to the motor than to the somatosensory system, (4) the rat claustrum seems to function more as a satellite than a relay structure in relationship to the cerebral cortex.
5
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Effect of stress on stereological parameters of polished sections of soil samples

86%
Guc A., Czachor H., Konstankiewicz K.
International Agrophysics
|
1995
|
tom 09
|
nr 4
6

The influence of storage time upon the real thickness of the histological brain sections

86%
Dziewiatkowski J., Spodnik J. H., Wojcik S., Spodnik E., Morys J.
Folia Histochemica et Cytobiologica
|
2002
|
tom 40
|
nr 2
7

Stereological analysis of mitochondria in embryos of Rana temporaria and Bufo bufo during cleavage

86%
Romek M., Krzysztofowicz E.
Folia Histochemica et Cytobiologica
|
2005
|
tom 43
|
nr 1
8

Stereological estimation of ovarian oocyte volume, surface area and number: application on mice treated with nandrolone decanoate

72%
Karbalay-Doust S., Noorafshan A.
Folia Histochemica et Cytobiologica
|
2012
|
tom 50
|
nr 2
9

Relation between the age of specimen and the shrinkage of brain frozen sections

72%
Dziewiatkowski J., Wojcik S., Spodnik J. H., Spodnik E., Kowianski P., Morys J.
Folia Histochemica et Cytobiologica
|
2002
|
tom 40
|
nr 2
10

The different patterns of maturation of the claustrocortical connections in a rabbit

72%
Kowianski P., Dziewiatkowski J., Karwacki Z., Morys J.
Folia Morphologica
|
2000
|
tom 59
|
nr 3
The quantitative analysis of the claustrocortical connections labeled with the fluorescent retrograde tracer Fluoro-Gold (FG) was conducted on 90 rabbits subdivided into the following age groups (P2, P7, P14, P21, P30, P60, P90, P120, P180). The equal volumes of retrograde fluorescent tracer FluoroGold (FG) were injected into the selected regions of the motor or somatosensory cortices. The volume of the dorsal part of the claustrum, total number of projecting neurons, numerical density and percentage distribution of projecting neurons were estimated by means of the unbiased stereological methods. The claustrocortical connections both with the motor and somatosensory areas in a rabbit are established in the postnatal life. The parts of the claustrum occupied by the motor and somatosensory projection zones as well as the morphology of the cortically projecting neurons do not reveal characteristic changes during the studied period. The significant decrease of the total number and numerical density of cortically projecting neurons as well as the increase of the claustral volume may reflect the process of adjustment of the claustrum to its modulatory function upon corresponding cortical areas. The intensity of the claustral connections with the motor and somatosensory cortices reveals significant difference during the studied period, being higher for the motor projection. It may be assumed that the claustrocortical connections established before birth undergo significant quantitative changes during postnatal development.
11

Utilization of yolk platelets during early embryonic development of Rana temporaria and Bufo bufo

72%
Romek M., Krzysztofowicz E.
Folia Histochemica et Cytobiologica
|
2001
|
tom 39
|
nr 3
12

Ultrastructural and stereological studies of hepatocytes in prenatal development of swine

72%
Bielanska-Osuchowska Z.
Folia Morphologica
|
1996
|
tom 55
|
nr 1
13

Claustrocingulate connections in the rabbit and rat - a stereological study

72%
Majak K., Kowianski P., Dziewiatkowski J., Karwacki Z., Luczynska A., Morys J.
Folia Morphologica
|
2000
|
tom 59
|
nr 1
Unbiased stereological methods were used for estimating the numerical density and the total number of claustral neurones projecting to the cingulate cortex in rabbit and rat. In rat the numerical density of neurones projecting to the retrosplenial granular cortex (RSG) differed significantly from those projecting to the retrosplenial agranular (RSA) and cingulate (Cg) cortices while in rabbit the numerical densities of retrogradely labelled neurones in the claustrum following injections into various areas of the cerebral cortex did not differ significantly. The total number of retrogradely labelled neurones in the claustral limbic zones did not differ significantly in both species. The quantitative analysis of claustral zones projecting to a different cingulate cortex area, both in rabbit and rat, reveals that each of these zones is rather homogeneous.
14

Postnatal development of the somatosensory thalamocortical projection in rat and rabbit - a combined retrograde transport and stereological comparative study

58%
Luczynska A., Dziewiatkowski J., Jagalska-Majewska H., Kowianski P., Spodnik J., Morys J.
Folia Morphologica
|
2003
|
tom 62
|
nr 2
A comparative quantitative study of the somatosensory thalamocortical connections in the rat and rabbit, labeled with the fluorescent retrograde tracer FluoroGold (FG), was conducted by means of unbiased stereology. FG was injected into the primary somatosensory cortex of the rat and rabbit in different age groups from P0 to P180 (P-postnatal day). The numerical density of retrogradely labeled the ventroposterolateral (VPL) projection neurons was analyzed. A significant decrease in this parameter was observed during the first two weeks of postnatal life in both studied species. Changes of the neuropil volume and selective elimination of early cortical connections stemming from the VPL may possibly cause this process. A withdrawal of axon collaterals from the expanded cortical sites as well as apoptosis (existing both in the VPL and parietal cortex) contribute to a decrease in the numerical density. Our observations allow us to conclude that the thalamocortical somatosensory connections established before the birth undergo significant quantitative changes in both studied species during the first two weeks of postnatal life and this period seems to be crucial for maturation of the thalamocortical loop.
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