Palmar dermatoglyphics in Libyan population

To construct some population standards of some of the palmar dermatoglyphic features in the adult Libyans living in Tripoli. A total number of 100 adult Libyan males and 100 adult Libyan females living in Tripoli were used in this study. They were students at Faculty of Medicine, Al-Fateh University during the academic year 2009/2010. Their ages ranged from 18-20 years. For all subject palmar dermatoglyphic studies; Atd angle and a-b ridge count were done. The palmar jiexion creases; normal, Simian, Partial Simian and Sydney pattern were investigated. Mean atd angle of right hand of adult male [33.74] was less than that of the left hand [33.89]. Mean atd angle of the right hand of the adult female [34.37] was less than that of the left hand [34.61]. On the other hand, the mean atd angles of both right and left hands of the male were less than that of the female. A-b ridge count of right hand of male adult [38.31] was less than that of left hand [38.7]. The same result was seen in the female; a-b ridge count of right hand of female adult [35.77] was less than that of the left hand [36.87]. However, the a-b ridge count of both right and left hands of the male are more than that of the female. The percentage of the normal palmar flexion creases was found to be more in both hands of the adult male [81% for both,] than that of both hands of the female [68% for the right hand and 72%/or the left hand]. Conversely, the percentage of the abnormal types of palmar flexion creases was found to be less in both hands of the male [19%] than that present in both hands of the female [32% for the right hand and 28% for the left]. The data of this study discover the presence of sexual differences and bilateral asymmetry of almost all the palmar dermatoglyphic .features studied. The variations may be attributed to the genetic factor influencing their development

Hand parameters of adult Libyans

The hand measurements were carried out on both hands and all fingers of each volunteer to perform a standard for the Libyan population. Hand print impressions of 200 adult Libyan voluteers [100 males and 100 females] were taken. They are right handed. They live in the city of Tripoli. They are students a Faculty of Medicine, Al-Fateh University. Their ages were from 18-20 years old. They have good health and free of any chronic debilitating disease. The parameters studied were maximum length and breadth of both hands and for each finger of both hands. Hand Index [maximum hand width / hand length X 100] and finger Index [maximum finger width /finger length X 100] for each finger were estimated. The data were analyzed using different histograms. The data show the presence of bisexual highly significant differences and bilateral non-significant differences of almost all hand and finger parameters. Also, these data are different from that found before in other populations. Variations in hand measurements may be attributed to several factors like genetic, racial, geographical, climatic and nutritional. This work is the first study done on Libyans and was presented, discussed and accepted at the First International Congress of Medical Science, Towards Advanced Medical Horizons. Al-Baida, Libya, 23-25/04/2010, pp: 84

study of effects of the Infrared laser on the adult albino rat thyroid gland

The thyroid gland and its hormones are so essential for normal growth and develodopment. The thyroid gland is unique in having a histological organization that provides for extracellular storage of its products in lumen of the follicles. Nowadays, laser is widely used in medical therapy. Laser beams are most effective as biological stimulants. Low energy laser irradiation produces various effects at the biochemical, cellular, histological and functional levels. So, this study aimed at studying the histological and ultrastructural effects of laser irradiation on the thyroid gland. In the present work 20 adult male albino rat were used. These animals were divided into two groups, control and experimental, each of them was formed of 10 animals. Each experimental animal was exposed to spot laser irradiation over the right lobe of the thyroid gland. The laser beam was applied for 5 minutes once daily for one month in a dose of 1.92 J/cm 2. The thyroid gland was fixed in either 10% formaldehyde solution for paraffin sections or in 5% gluteralehyde for semithin and ultrathin sections and routinely processed. The paraffin sections were stained with Hematoxeline and Eosin and Van Gisson stains. Whowever, semithin sections were stained with toluidine blue. Ultrathin sections were stained with uranyl acetate and lead citrate. The results showed that: The thyroid follicles were larger in size in experimental group than that of control group, more widely separated by thickened interacinar reticular septa. Heights of their follicular cells were variable from cuboidal in engorged thyroid acini, to columnar in less distended acini. Their colloid secretion was not homogeneously distributed among different follicles and even inside the same acinus. There was an increased vascularily in the form of perifollicular distended and tortuous blood vessels. Also, interacinar capillaries appeared more winded, engorged by blood cells and had thicker walls. By electron microscopy: apical surface of follicular cells was devoid of indentations and microvilli, in reverse to the control group. The cytoplasm was paler and contained lesser amounts of cytoplasmic organelles specially rough endoplasmic reticulum and its cisternae, mitochondria, lysosomes and large secretory granules but not free ribosomes. In conclusion, laser irradiation increases blood supply and does some cellular changes

anatomic variations of the arterial supply of the human heart [Right or Left coronary artery dominance an angiographic study]

This study was done on a total of 149 cases [120 males and 29 females] of different ages ranging from 20 to 72 years. The results were statistically analyzed and it was found that the dominance of the coronary arteries is mainly right in either males or females. The majority of cases were found to be in the age group 40-60 years. Also, significant statistical differences were found in the age groups 20-40 and 40-60 years; whereas, there were no significant statistical differences in the age group above 60 years