Histological and immunohistochemical study of albino rat filum terminale at different postnatal ages

It is difficult to find accurate data on the normal histology of the filum terminale because the previous studies dealing with its structures are insufficient. The present work aimed to study the histological structure of the filum terminale of the albino rat at different postnatal ages. Thirty six albino rats at different ages were divided into six groups; full term, two weeks, one month, adult [three months], six months and one year. The filum terminale was cut in situ at the level of the iliac crest, excised from its attachment to the coccyx and fixed. The specimens were processed for light and immunohistochemical Study. All sections were examined by light microscope. Filum terminale of the albino rat consisted of ependymal canal surrounded by central and marginal zones. The canal was variable in site, shape and lining ependymal cells according to age. The central and marginal zones contained neuron and glial [oligodendrocyte, microglia and astrocyte] cells immersed in neuropil fibers which changed with the advance of age. Negative Glial-Fibrillary-Acidic Protein [GFAP] reaction in the full term filum terminale group. In two weeks group; there was positive reaction. In one month group there was strong reaction which persisted with gradual decline in three and six month groups. In one year, GFAP reaction was scanty positive or even negative. The albino rat filum terminale contains neurons, glial cells, GFAP-positive glial fibers and neuropil fibers. Structural changes occur in these constituents with age

Identification of sex from patella in Egyptians

The present study aimed to detect the reliability of sex determination based exclusively on patellar measurements of Egyptians. Sixty-two normal right patellae were taken from 62 cadavers [34 males and 28 females] aged from 22 to 70 years and belonging to Egyptian population. Seven measurements [maximum width, maximum height, maximum thickness, width and height of the lateral and the medial articular surfaces] were estimated for each patella and statistically analyzed. The results revealed that the measurements of males were significantly higher than those of females except for the height of the medial articular surface. Maximum width was the most reliable parameter in sex prediction with 93.55% rate of accuracy, followed by the maximum thickness and width of the lateral articular surface. Combination of two parameters showed that the maximum thickness with the width of the lateral articular surface gave the highest rate of accuracy for correct sex determination [95.2%]. These results can help in identification of sex from the patella when no other human remains suitable for sex determination are available

Identification of sex from patella in Egyptians

The present study aimed to detect the reliability of sex determination based exclusively on patellar measurements of Egyptians. Sixty-two normal right patellae were taken from 62 cadavers [34 males and 28 females] aged from 22 to 70 years and belonging to Egyptian population. Seven measurements [maximum width, maximum height, maximum thickness, width and height of the lateral and the medial articular surfaces] were estimated for each patella and statistically analyzed. The results revealed that the measurements of males were significantly higher than those of females except for the height of the medial articular surface. Maximum width was the most reliable parameter in sex prediction with 93.55% rate of accuracy, followed by the maximum thickness and width of the lateral articular surface. Combination of two parameters showed that the maximum thickness with the width of the lateral articular surface gave the highest rate of accuracy for correct sex determination [95.2%]. These results can help in identification of sex from the patella when no other human remains suitable for sex determination are available

study of within-pair discrimination of genetically identified monozygotic twins

10 pairs of morphologically concordant, like-sexed twins whose monozygositywere confirmed by HLA-DR genomic typing using a combination of PCRamplification and DNA heteroduplex analysis were subjected for within-paircomparison of fingernail striation patterns and some dermatoglyphic traits offingertips, middle phalanges, palms, toes and soles. Fingernail striationpattern showed large areas of similarity between both members of monozygotic[MZ] twin, but it was still unique. So, they could be used for within-pairdiscrimination of MZ twins. Both qualitative and quantitative dermatoglyphicanalyses revealed that within-pair pattern symmetry is best illustrated bycomparing palmar and plantar patterns on heterologous [right versus left andvice versa] palms and soles. Also, middle phalanges gave high percentage ofpattern symmetry on homologous fingers. However, fingertip and toe patternsshowed high% of within-pair pattern asymmetry; thus, they are the mosthelpful dermatoglyphic traits for within-pair discrimination