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Öğe A comparative study of oculomotor, trochlear and abducens nerves in Arabian foals(TAYLOR & FRANCIS INC, 2017) Bolat, D.; Yildiz, D.; Bahar, S.; Yuruker, S.; Kaymaz, F.; Ilgin, C.; Bozkurt, E. U.We investigated the microscopic structure of transverse sections of the oculomotor, trochlear and abducens nerves of Arabian foals using stereological methods. Bilateral nerve pairs from 2month-old female Arabian foals were analyzed. The tissues were embedded in plastic blocks, then 1 mu m thick sections were cut and stained with osmium tetroxide and methylene blue-azure II. Stereology was performed using light microscopy. Morphometry showed that the right and left pairs of nerves were similar. The transverse sectional areas of the oculomotor, trochlear and abducens nerves were 1.93 +/- 0.19 mm(2), 0.32 +/- 0.06 mm(2) and 0.70 +/- 0.08 mm(2), respectively. The oculomotor nerve exhibited a significantly greater number of myelinated axons (16755 +/- 1279) and trochlear (2656 +/- 494) and the abducens nerves (4468 +/- 447). The ratio of the axon diameter to myelinated nerve fiber diameter was 0.58, 0.55 and 0.55 for the oculomotor, trochlear and abducens nerves, respectively. Of the three nerves studied, the abducens nerve exhibited the greatest nerve fiber area, myelin area, nerve and axon diameters, and myelin thickness. The ratio of small myelinated nerve fibers was greatest in the oculomotor nerve.Öğe Comparison of the Morphometric Features of the Left and Right Horse Kidneys: A Stereological Approach(WILEY, 2013) Bolat, D.; Bahar, S.; Tipirdamaz, S.; Selcuk, M. L.The aims of this study were to determine the total volume of the horse kidney and volume fractions of its functional subcomponents (cortex, medulla, renal pelvis) using stereological methods and investigate any possible difference in the functional subcomponents of the right and left kidneys that may arise from differences in shape. The study was carried out on the kidneys of 5 horses of different breed and sex. The weight of the kidneys was measured by a digital scale, and kidney volume was calculated by Archimedes' principle. Total kidney volume and volume fractions of subcomponents of the right and left kidneys were estimated by the Cavalieri's principle. The weights of the right and left kidneys were 550 +/- 25g and 585 +/- 23g, respectively. The volumes of the right and left kidneys estimated using the Cavalieri method were 542 +/- 46ml and 581 +/- 29ml. The relative organ weight of the kidneys was calculated as 1:330. The densities of the right and left kidneys were determined to be 1.01 and 1.00, respectively. The mean volume fractions of the cortex, medulla and renal pelvis were determined as 55.6, 42.7 and 1.7 in both kidneys. No statistically significant difference existed between morphometric data pertaining to the right and left kidneys (P>0.05). To determine precisely whether differences in shape cause any difference in the functional subcomponents of the right and left kidneys requires further investigation of differences in the number of microscopically functional unit of the kidney such as renal glomeruli and nephrons.Öğe The distribution of the cardiac veins in angora rabbits (Oryctolagus cuniculus)(BLACKWELL PUBLISHING, 2007) Bahar, S.; Tipirdamaz, S.; Eken, E.This study was carried out to describe the ramifications of the cardiac veins of Angora rabbit. For this purpose, a total of 16 adult healthy Angora rabbits of both sexes, 1.5-2 years of age, were used. The great, middle, right cardiac veins ran in a subepicardial course and opened into the left cranial vena cava, but some tributaries of the right cardiac veins sometimes also joined various portions of the right atrium. The smallest cardiac veins followed subendocardially and terminated in the right chambers of the heart. Based on their origin, course and frequency, it was concluded that the smallest cardiac veins are primarily responsible for the drainage of the interventricular septum. Results from this study are thought to shed light on further heart-related medical studies, and to contribute considerably to the present anatomical knowledge of the cardiac veins in this species.Öğe The distribution of the coronary arteries in the angora rabbit(WILEY, 2007) Bahar, S.; Ozdemir, V.; Eken, E.; Tipirdamaz, S.The aim of this study was to determine the origin, course, termination and anastomosing of the coronary arteries in Angora rabbits. Eight adult healthy male Angora rabbits were used. Coloured latex was injected into the ascending aorta. A. coronaria sinistra of the Angora rabbit had larger diameter than a. coronaria dextra. It was divided into r. proximalis atrii sinistri, r. interventricularis paraconalis and r. circumflexus sinister in six Angora rabbits as well as r. septi interventricularis in two. R. septi interventricularis that stem directly from a. coronaria sinistra in two animals and from r. interventricularis paraconalis in six was a principal vessel responsible for the septum interventriculare. R. marginis ventricularis sinistri originating from r. circumflexus sinister was the most prominent artery on the auricular surface of the heart. R. interventricularis subsinuosus was not detected in Angora rabbits examined. A. coronaria dextra, crossing the sulcus coronarius immediately after its origin, ran obliquely in direction of the sulcus interventricularis subsinuosus to supply the right portion of the heart. The ventricular and septal branches of a. coronaria sinistra and a. coronaria dextra ran subepicardially at the beginning then intramyocardially and mostly parallel to the muscle fibres as surrounded by a thin adipose tissue. Their atrial branches were seen continuously to run subepicardially.
