Araştırma Çıktıları

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Author: search.filters.author.Arbak, SerapHas files: No

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    Early Onset of Atherosclerosis of The Carotid Bifurcation in Newborn Cadavers
    (PREMCHAND SHANTIDEVI RESEARCH FOUNDATION, 2016-01-01) Uslu, Bahar; Cakmak, Yusuf Ozgur; Sehirli, Umit; Keskinoz, Elif Nedret; Cosgun, Erdal; Arbak, Serap; Yalin, Aymelek
    Introduction: The anatomy of arterial bifurcations affects blood flow and has a significant role in the development of vascular disease. Therefore, it is important to know the structural characteristics of the Common Carotid Artery (CCA) and its branches for early onset of atherosclerosis in newborns. Aim: The present study was conducted to evaluate the characteristics of CCA in newborn cadavers. Materials and Methods: Eight carotid arteries obtained from newborn cadavers were used. The outflow to inflow area ratios was calculated to evaluate vessel diameters. Additionally, scanning electron and light microscopic investigations were conducted with tissue samples. The brachial artery of each cadaver was used as controls. Correlation between area ratios and atherosclerotic endothelial damage was determined. Results: Light microscopic investigations demonstrated that control group sections showed no positivity for Oil red O staining, while carotid bifurcation regions depicted widespread occurrence of intimal lipid accumulations. Scanning electron microscopic examination of control group sections presented regular endothelial topography, while carotid bifurcation region topography exhibited numerous blood cells and separated endothelial cells. Fibrin accumulation on endothelial surface in low area ratios was another important finding in the examination of its endothelial surface degeneration. The above-mentioned morphological findings seemed to be quite parallel to outflow to inflow area ratio data favouring low area and degeneration. Conclusion: The correlation between area ratios and the histological characteristic of cerebral vessels of newborn cadavers indicate that early stages of atherosclerosis began in early embryologic life.
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    A New Hypothesis on the Frequency Discrimination of the Cochlea
    (AVES, 2017-01-01) Bulut, Erdogan; Uzun, Cem; Ozturk, Levent; Turan, Pinar; Kanter, Mehmet; Arbak, Serap
    OBJECTIVE: Medial olivocochlear efferent (MOCE) neurons innervate outer hair cells (OHCs) of the cochlea, which in turn leads to basilar membrane motion. We hypothesized that MOCE-induced alterations in basilar membrane motion, independent of traveling waves, is responsible for the cochlear frequency discrimination of sound. MATERIALS and METHODS: Eleven guinea pigs underwent bilateral otoscopic and audiologic evaluations under general anesthesia. The study comprised two parts. Part I (n=11) included spontaneous otoacoustic emission (SOAE) recordings with or without contralateral pure-tone acoustic stimuli (1 and 8 kHz) at 60 dB sound pressure level (SPL). Part II involved pure-tone (1 or 8 kHz) acoustic trauma in the right ears of two randomly selected subgroups (G1: 1 kHz
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    Morphological evaluation of the effects of exercise on high-fat-diet-induced liver damage in rats
    (AVES, 2020-01-01) Elmas, Merve Acikel; Atay, Nilsu; Ozakpinar, Ozlem Bingol; Arbak, Serap; Kolgazi, Meltem; Sener, Goksel; Ercan, Feriha
    Background/Aims: This study was aimed to investigate the protective effects of swimming on nonalcoholic fatty liver disease associated with high-fat-diet-induced obesity using microscopic and biochemical parameters. Materials and Methods: Sprague-Dawley male rats were fed either standard chow (STD group