Browsing by Author "Aydinlioglu, A"

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Anatomical Characteristics of the Tibial Medullary Canal and Their Implications for Intramedullary Fixation
(Sage Publications Ltd, 2003) Tosun, N; Aydinlioglu, A; Akpinar, F; Dogan, A; Islam, C
The use of intramedullary fixation methods in the tibia is limited by the anatomical characteristics of this bone. In this study, the shape and degree of axial lateral rotation of the medullary canal were determined in 45 human dry cadaver bones using X-ray and computed tomography examinations and direct measurement of rotation in inserted nails. Forty bones (88.8%) had slight and five bones (11.1%) had excessive anterior bowing along the tibial shaft. Six of the 45 bones (13.3%) had an extremely narrow medullary canal. Axial lateral rotation was demonstrated in the middle third of the medullary canal, being on average (+/- SD) 32.35 +/- 16.25degrees (range 10 - 75degrees). This study revealed that extreme narrowing of the medullary canal, axial lateral rotation of the medullary canal, and extreme anterior bowing of the tibial shaft are the anatomical characteristics most likely to cause difficulties when using intermedullary fixation in the tibia.
The Autonomic Innervation of the Testicular Parenchyma
(Scandinavian Federation Laboratory Animal Science, 2003) Erdogan, E; Aydinlioglu, A; Ragbetli, MC; Özbek, H; Göçer, F
The specific roles and direct involvements of autonomic innervations on the spermatogenic process are poorly understood. The aim of this study was to investigate stereologically the relative importance of sympathetic innervations in testicular parenchyma rats in chemically sympathectomized with guanethidine. Treated animals (n=10) were injected intraperitoneally with guanethidine at doses of 10mg/kg/day for 15 days while control animals (n= 5) received an equivalent volume of saline. After routine histological procedures, 5mum thick sections of the testes were selected for examination. Organ volumes were estimated using the Cavalieri Principle of volume measurement by means of consecutive serial sections, using "J Images" software in a computer. At least 10 seminiferous tubules were selected randomly and measured per cross section for evaluation of epithelial heights, luminal diameter and total seminiferous tubule diameter. Testicular volumes and seminiferous tubule measurements of treated animals were found to be affected by the chemical sympathectomy with guanethidine with a a statistically significant difference between experimental and control group (p<0.01). Our findings indicate that chemical sympathectomy with-short term low dose guanethidine might display morphometric changes in the rat testis which indicate the presence of autonomic innervation of its parenchyma.
Bilateral Median Nerve Compression at the Level of Struthers' Ligament - Case Report
(Amer Assoc Neurological Surgeons, 2000) Aydinlioglu, A; Cirak, B; Akpinar, F; Tosun, N; Dogan, A
Struthers' ligament syndrome is a rare cause of median nerve entrapment. Bilateral compression of the median nerve is even more rare. It presents with pain, sensory disturbance, and/or motor function loss at the median nerve's dermatomal area. The authors present the case of a 21-year-old woman with bilateral median nerve compression caused by Struthers' ligament. She underwent surgical decompression of the nerve on both sides. To the authors' knowledge, this case is the first reported bilateral compression of thp median nerve caused by Struthers' ligament. The presentation and symptomatology of Struthers' ligament syndrome must be differentiated from median nerve compression arising from other causes.
Heights of the Lumbar Intervertebral Discs Related To Age in Turkish Individuals
(Tohoku Univ Medical Press, 1999) Aydinlioglu, A; Diyarabakirli, S; Keles, P
The present study investigated the changes in the heights and anteroposterior diameters of human intervertebral discs by means of measurements from radiographs, to determine age changes of lumbar intervertebral discs in Turkish people. Measurements of anterior and posterior disc different age groups from lateral radiographs. The height of the intervertebral disc increases with aging only in males and the disc depth in both sexes. Our findings generally corroborate previous studies. It is suggested that the different findings from the present study might be peculiar to the society. (C) 1999 Tohoku University Medical Press.
Mathematical Relations Between the Lengths of the Metacarpal Bones and Phalanges: Surgical Significance
(Tohoku Univ Medical Press, 1998) Aydinlioglu, A; Akpinar, F; Tosun, N
The mathematical relationship between the lengths of the metacarpals and phalanges is important in hand surgery because of its role in determining the lengthening of the tubular bone size or the length of a prosthesis. The purpose of the present study is to perform the measurements on the hand radiographs, and to determine possible mathematical relations between the lengths of the metacarpals and phalanges. The lengths and widths of metacarpals and phalanges were measured in millimeters on hand roentgenograms of 100 normal voluntary subjects (50 men, 50 women) and the results were evaluated with a descriptive analysis test. The relations between the lengths of the metacarpals and phalanges were mathematically investigated on several sets of data. Unchangeable proportions between the metacarpals and phalanges lengths were found and formulated. Because any defects or faults of the hand, especially shortness, can corrected with current improved surgical techniques, a knowledge of the morphometric relations between the lengths of metacarpals and phalanges may be useful for such surgical interventions.
Maxillary and Sphenoid Sinus Aplasia in Turkish Individuals: a Retrospective Review Using Computed Tomography
(Wiley, 2004) Aydinlioglu, A; Erdem, S
The absence of a maxillary or sphenoid sinus in an adult is an extremely rare condition. We investigated maxillary and sphenoid sinus aplasia in adult Turkish individuals using computed tomography (CT). We examined CT scans in the axial and coronal planes of the paranasal sinuses in 1,526 patients. The CT scans of a 21-year-old male were notable for bilateral maxillary sinus aplasia. Another patient, a 20-year-old female, had CT scans that showed the unilateral absence of a maxillary sinus. Two additional cases showed the unilateral absence of one sphenoid sinus. Bilateral absence of the sphenoid sinuses was not observed in our study. The clinical implications of maxillary and sphenoid sinus aplasia will be further discussed. (C) 2004 Wiley-Liss, Inc.
Morphologic Evaluation of the Ulna
(Taylor & Francis As, 2003) Akpinar, F; Aydinlioglu, A; Tosun, N; Tuncay, I
Intramedullary ulnar nailing may be technically difficult. We used various methods and measurements to determine the ideal nail entry point and the shape, length, diameter and curvature of the medullary canal in 44 human cadaver ulnas. We found that the ideal nail entry point was, on average, 7 mm proximal and 3 mm lateral to the most prominent area of the olecranon. A nail of 3 mm diameter could easily be inserted through a hole at the proximal-lateral side of the most prominent part of the olecranon, but only 20% of all nails could be easily inserted through a hole in the middle of the olecranon. We found that correct selection of a nail of proper length and diameter, as well as an ideal nail entry point on the olecranon are essential to successful nailing.
A Morphometric Study on the Humerus for Intramedullary Fixation
(Tohoku Univ Medical Press, 2003) Akpinar, F; Aydinlioglu, A; Tosun, N; Dogun, A; Tuncay, I; Ünal, Ö
In recent years, the popularity of intramedullary humeral nailing is on the rise in spite of its handicaps. There are many problems in intramedullary humeral. stabilization because of the anatomic structure of the bone. We performed various methods and measurements to determine shape, length and diameter and curvature of the medullary canal of the humerus in 57 human dry cadaver bones. Anterior angulation with an average of 21 cm apart from greater tubercle was found at 1/3 distal part. Mean degree of angulation was 9degrees (max: 15, minutes: 5, S.D.: 2.84). Humerus bones with septal aperture (supratrochlear foramen) at the fossa coronoidea were observed to have very narrow medullary canal. The best point for nail insertion was found to be an area on the line from greater tubercle anteromedially to caput humeri. This study revealed that carefully evaluated structure of humeral medullary canal and various congenital constructions such as septal aperture, and correct selection of a nail with proper length and diameter are essential for successful nailing.
The Relationship of Callosal Anatomy To Paw Preference in Dogs
(Swets Zeitlinger Publishers, 2000) Aydinlioglu, A; Arslan, K; Erdogan, AR; Ragbetli, MÇ; Keles, P; Diyarbakirli, S
Previous studies have described the paw preference and asymmetry in dog brains, based on experimental studies. The purpose of the present study is to investigate a possible association between callosal anatomy and paw preference in dogs. The midsagittal area of the dog corpus callosum was measured in its entirety and in six subdivisions in a sample of 21 brains obtained from 9 male and 12 female mongrel dogs which had paw preference testing. The present study showed significant paw differences in dog corpus callosum. A posterior segment of the callosum, the isthmus, was significantly larger in the right pawedness than the left.
The Relationships of Dog Hippocampus To Sex and Paw Preference
(Taylor & Francis Ltd, 2006) Aydinlioglu, A; Arslan, K; Cengiz, N; Ragbetli, M; Erdogan, E
Previous studies have described paw preference and asymmetry in dog, brains. Electrical activity of the dorsal hippocampus also indicated the existence of hippocampal asymmetry in dogs. In the present study, the possible paw and sex-related asymmetries and right-left differences in dog hippocampus were investigated. The hippocampus was dissected and weighed. Each hippocampus was cut into slices by the slicing apparatus placed horizontally on the tissues. The volumetric measurements were performed using the formula modified from the Cavalieri principle. The present study indicated the significant sex and paw differences and no right-left asymmetry in dog hippocampi. The morphological asymmetries in normal subjects might be related to functional hippocampal asymmetries in memory or in cognitive skills.
Sex Differences and Right-Left Asymmetries in Rat Hippocampal Components
(Taylor & Francis Ltd, 2002) Ragbetli, MÇ; Aydinlioglu, A; Kaplan, S
Previous reports have indicated morphologic hippocampal asymmetry in thickness in male and female rats. In the present study, the possible sex differences and right-left asymmetries in rat hippocampal components were investigated. Pyramidal cells in four hippocampal sectors on thionin-stained sections were counted and the thickness of the hippocampal components was measured on microslide-projected images. The present study showed significant sexual dimorphism in two hippocampi as well as asymmetry in male. These findings agree with those found in humans.
Sex Differences in Dog Corpus Callosum
(Swets Zeitlinger Publishers, 2000) Aydinlioglu, A; Arslan, K; Ragbetli, MÇ; Erdogan, AR; Keles, P; Diyarbakirli, S
Human studies reported sex differences in size and shape of the corpus callosum. These observations have been contested. The purpose of the present study is to investigate possible sex differences in the corpus callosum of dogs. The entire brains including the medulla from 12 female and 9 male adult mongrel dogs wore removed and weighed. Total and partial area measurements of the callosum were made from photographic tracings of its outline. The callosum was partitioned into 3 regions; anterior half, posterior half, posterior one-fifth. The total corpus callosum, anterior half, posterior half, and posterior fifth or splenium areas were measured. Sex differences were found. The anterior half, the posterior half, the posterior fifth, and the total callosum were significantly greater in absolute area in males than in females.
Symptomatic Os Triangulare. (Case Report)
(Masson Editeur, 1999) Akpinar, F; Aydinlioglu, A; Tosun, N
Os triangulare is an accessory bone found in the triangular cartilage of the wrist just distal to the end of the ulna and is generally asymptomatic. A case report of symptomatic Os triangulare is reported. Treatment associated immobilization and anti-inflammatory medication.
Total Bilateral Carpal Coalition With Carpometacarpal Fusion: One Case
(Masson Editeur, 2001) Tuncay, I; Akpinar, F; Unal, O; Aydinlioglu, A
Carpal coalition may involve more than two carpal bones wich is more common when coalition occurs as part of a syndrome of congenital malformations. We describe an unusual case of congenital complete entire carpal coalition with massive carpometacarpal coalition except the first carpometacarpal joint and abnormal distal radioulnar joint bilaterally. In addition, radiocarpal joint surfaces were slightly irregular but compatible. There were abnormal distal radioulnar joints and ulnar styloids articulated with the ulnar side of the lunate of the both wrists.
Variants and Deformities of Atlas Vertebrae in Eastern Anatolian People
(Saudi Med J, 2004) Kavakli, A; Aydinlioglu, A; Yesilyurt, H; Kus, I; Diyarbakirli, S; Erdem, S; Anlar, Ö
Objective: At the craniocervical junction, developmental anomalies of the atlas may produce clinical symptoms by compressing on the vertebral artery, particularly during extreme rotational movements of the cervical spine. The aim of the present study was to investigate several varieties and deformities of the atlas vertebra from the skeletal specimens of Eastern Anatolian people. Methods: This study was carried out over a 3-year period, 2000 through to 2002 in the Department of Anatomy, Firat, Yuzuncu Yil and Ataturk University, Turkey. Developmental anomalies and the variants of the first vertebrae were investigated on 86 atlas. Results: Ponticulus posterior was observed with a low frequency on right as 2.3%. The bilateral localization was 10.5% and the left-side localization was 9.3%. Ponticulus lateralis showed an equal localization as 1.2% on the right, 1.2% on the left and 1.2% bilateral. In the present study, a complete subdivision of the joint surface was observed in 11 atlases (12.8%). Processus infratransversarius atlantis with a frequency between 1.2-7%, arthrotic formation and corona atlantis peridentals in 8 cases (9.3%) were also found. Conclusion: The low frequency for fonticulus posterior might be peculiar to the population living in this area.