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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.; Sabanci, S. S.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 Immunohistochemical Expression of LRG5 and CD44 in Colorectal Polyps and Adenocarcinomas: Implications for Carcinogenesis(Oxford Univ Press, 2016) Yildiz, D.; Balci, M.; Yildiz, S.…Öğe The scanning electron and light microscopic structure of bovine tactile hair(Blackwell Verlag Gmbh, 2004) Yildiz, D.; Gultiken, M.E.; Karahan, S.Bovine tactile hairs in skin samples from the lateral side of the upper lip were examined using scanning electron and light microscopy. The root of these hairs has a variable length and is surrounded by a large sinus located between the internal and the external dermal sheath. With a prominent thickness, the external dermal sheath forms the external wall of the tactile hair and contains many nerves some of which extend into trabeculae. Trabeculae projecting from the internal dermal sheath and attaching to the external dermal sheath with two or more branches are present in the entire sinus. The trabeculae are interconnected by connective tissue sheets that support the integrity of the trabecular organization. The sinus surfaces as well as trabeculae are lined by endothelia. As a result, the bovine tactile hair is truly a cavernous type of tactile hair with a well organized microscopic anatomy. Thus, the bovine tactile hair most likely plays an important role in relatively immobile and insensitive bovine lips.Öğe SEM investigation of the avian atrium wall(Ecole Nationale Veterinaire Toulouse, 2004) Yildiz, D.; Gultiken, M.E.In this study, the atrium wall of the chicken was investigated by Scanning Electron Microscopy (SEM) and routine histology. The wall of the left atrium was thicker and more uniform than that of the right atrium. However, the lumen of the right atrium was more voluminous than that of the left atrium. The average thickness of the pectinate muscles was 0.9 mm on the left atrium while 0.7 mm on the right atrium. The pectinate muscles were connected by the muscle bridges on the left atrium, but not on the right. The depressions on the right atrium wall were well defined and polygonal in shape; however, depressions on the left atrium were not as prominent.Öğe Vascularisation of the cerebellar nuclei in Akkaraman sheep(Akademiai Kiado, 2003) Yildiz, D.; Gultiken, M.E.This study reports an anatomical study of the vascular supply in 20 Akkaraman sheep cerebelli from adult subjects of both sexes. The origin and branching pattern of the cerebellar artery vascularising the cerebellar nuclei were studied by gross dissection and vascular injection. Then dissection was performed and vessels nourishing the cerebellar nuclei were documented. Four bilaterally symmetrical cerebellar nuclei were determined as nucleus lateralis cerebelli, nucleus interpositus lateralis cerebelli, and nucleus interpositus medialis cerebelli and nucleus fastigii from lateral to medial side. It has been previously confirmed that vascularisation of the cerebellar nuclei is carried out by intermediary branches of the rostral cerebellar artery and the caudal cerebellar artery. However, this study has confirmed that the caudal cerebellar artery has no contribution in the vascularisation of the cerebellar nuclei.
