R Basar

Hacettepe University, Ankara, Ankara, Turkey

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Publications (22)14.34 Total impact

  • [show abstract] [hide abstract]
    ABSTRACT: Both the course and localization of the transverse facial artery are described, based upon the bilateral dissection of heads from 20 human cadavers. Its anatomical relationships with the mandibular fossa, the articular tubercle, the zygomatic arch, the parotid duct and the maxillary artery are studied and morphometric features are calculated. Furthermore, the transverse facial territory was examined. This territory was supplied by a single perforating branch in 28 cases, by two perforating branches in 10 and by three perforating branches in 2. Knowledge of the course and relationships of the transverse facial artery should help to protect this artery from the risk for transection. However, the variable course of the transverse facial artery must always be taken into consideration by the clinicians during surgical procedures.
    Morphologie 01/2005; 88(283):191-5.
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    ABSTRACT: Using 600 bilateral femoral angiographies (300 male lower extremities and 300 female lower extremities), we observed configurations of the femoral origins of the medial circumflex femoral artery (MCFA), lateral circumflex femoral artery (LCFA) and the deep femoral artery. The distinct intergender difference was found in the incidence of direct origin of the MCFA from the femoral artery (17.8% and 80.0% in male and female limbs, respectively). The LCFA also exhibited a marked difference between genders in the incidence of direct origin. The Turkish population seemed to be characterized by an intergender difference in specific somatic arterial morphology.
    Anatomical Science International 01/2003; 77(4):250-3. · 0.63 Impact Factor
  • Article: Editorial
    Neuroanatomy. 01/2002;
  • Source
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    ABSTRACT: Although there is detailed knowledge on the organization of the motor neurons supplying the extraocular muscles, there are still some discrepancies concerning the results of different studies. This study is planned to reexamine the distribution of the motor neurons in the oculomotor nucleus of the rat. In the present study we used 20 young adult Sprague-Dawley rats in four groups which represent four extraocular muscle groups innervated by oculomotor nerve, namely medial rectus, inferior rectus, superior rectus and inferior oblique muscle groups. For each rat 1-2 µl of 30% Horseradish Peroxidase (HRP) is used as a tracer. Multiple injections were made to fully infiltrate the individual muscles. After determining the position of the medial rectus subgroup, injections were applied into more than one muscle in a single experiment in order to decide the proper localization of the motor neuron subgroups in relation to each other. For each of the muscle groups five rats were injected with HRP. The rostral end of the nucleus begins with a compact neuron group belonging to medial rectus subgroup. However, at the caudal end the neurons were scattered in a wider area gradually decreasing in number. Neurons innervating the medial rectus muscle were located ipsilaterally within the ventral and ventrolateral portions of the nucleus extending throghout its rostrocaudal length. Motoneurons belonging to the inferior rectus subgroup were observed ipsilaterally within the gap between the median raphe and medial end of the medial rectus subgroup. Motoneurons of the inferior oblique subgroup formed an ovoid cell mass ipsilaterally and slightly dorsal to the medial and inferior rectus subgroups. Neurons of the superior rectus subgroup were localized contralaterally within the caudal two thirds of the nucleus. The neurons of this subgroup were located at the ventral and ventromedial parts of the inferior oblique subgroup and dorsal to the inferior and the medial rectus subgroups.
    Neuroanatomy. 01/2002;
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    ABSTRACT: Transverse foramens of 250 cervical vertebras were examined. There were accessory foramina and variations in shape and number in 10 out of 250 cervical vertebras. Since such a variation of foramens, through which the vertebral artery passes, has not been detected in the literature, these ten cases are to be considered.
    Morphologie 07/2001; 85(269):23-4.
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    ABSTRACT: We report here a connecting branch between the musculocutaneous and the median nerves in a 42 years old male cadaver. The connecting branch was 8 cm in length and 3 mm in width. One of the brachial veins and the brachial artery were located between the roots of the median nerve and the second brachial vein was present between the connecting branch and the median nerve. These kinds of variations may effect the venous return and may cause edema in the upper extremities. Additionally, variations of these nerves have an importance during operations of this region.
    Morphologie 10/2000; 84(266):25-7.
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    ABSTRACT: The radial nerve's course from the axillary region, branch patterns and the relation of the nerve to fixed anatomical landmarks in the arm region were studied in 27 embalmed intact cadavers. The radial nerve and its relation with the sulcus nervus radialis (SNR) was analyzed. The direct contact of the nerve with humerus in SNR was observed during the dissections. The following measurements were made: the total length of the humerus (the palpable uppermost point of the tuberculum majus and the lateral epicondyle); proximal safe zone (the tuberculum majus and the proximal beginning of the SNR); distal safe zone (the intercondylar axis and the middle of SNR); lateral safe zone (the lateral epicondyle and the distal end of SNR). In conclusion, it was aimed to correlate the osseus palpable landmarks of humerus with the course of the radial nerve for a safe surgery as the sulcus nervi radialis region is one of the main risky areas for the radial nerve palsies.
    Okajimas Folia Anatomica Japonica 11/1999; 76(4):197-202.
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    ABSTRACT: This study was applied on 9665 cases between January 1993 and October 1998. Of these, 6985 (72.3%) were urologic patients and 2680 (27.7%) were autopsy cases. The patients having urinary complaint investigated by urine analysis and kidney-ureter-bladder film (KUB), routinely. In all patients who have pathological urine, ultrasonography exam was done and in all patients who established an abnormality on ultrasonography, intravenous pyelography (IVP) was taken, also. We established the horseshoe kidney in 23 of patients (1/304) and in 6 of autopsy cases (1/447) with overall incidence 1/333. There were 21 male and 8 female with horseshoe kidney (male/female = 2.6/1). Abdominal discomfort with lower lumbar pain and Rovsing's sign were seen in 56.5% and in 65.2% of patients respectively. We concluded that horseshoe kidney incidence is almost the same as reported in the literature, although its clinical appearance is higher in our urologic patient population. In the urological out-patient evaluation, at least Rovsing's sign should be applied to all patients with lower lumbar pain with vague abdominal discomfort and an abdominal ultrasonographic exam should be applied, if this sign is positive.
    Okajimas Folia Anatomica Japonica 09/1999; 76(2-3):137-9.
  • K M Erbil, S Onderoğlu, R Başar
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    ABSTRACT: This article describes a complex bilateral variation in the formation of lumbar plexus in a 32 year old male cadaver. On the left side the plexus was postfixed and located posterior to the psoas major muscle. The femoral nerve was formed by the union of anterior rami of the second, third, fourth and fifth lumbar spinal nerves. On the right side, the lumbar plexus was prefixed. The lateral cutaneous nerve of the thigh was formed by the union of the anterior rami of the first and second lumbar spinal nerves. The femoral nerve formed by branches from the first, second, third and fifth lumbar spinal nerves while the obturator nerve was formed by the union of the first, second and third lumbar spinal nerves. The right lumbar plexus was located in the substance of the psoas major muscle. In the present case, the formation of branches of the lumbar plexus were different from the previous data present in the literature.
    Okajimas Folia Anatomica Japonica 06/1999; 76(1):55-9.
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    ABSTRACT: To investigate changes in histology and nitric oxide synthase (NOS) activity in cavernosal tissues from rats with neurogenic erectile dysfunction induced experimentally. Twenty-four adult male Sprague-Dawley rats were divided equally into three groups and underwent a sham operation (control, group 1), unilateral (group 2) or bilateral (group 3) cavernosal nerve resection. Three months later they were killed and the cavernosal tissues analysed histologically by light and transmission electron microscopy, with NOS activity detected using an NADPH-diaphorase staining technique. On light and electron microscopy, while penile nerves and cavernosal smooth muscle cells had a normal morphological appearance in the eight control rats, there were degenerative changes of the myelinated penile nerves and axonal fibrosis in groups 2 and 3. However, these changes were not significant. Using NADPH-diaphorase staining, NOS activity was detected in all three groups in endothelial cells and cavernosal structures. However, the staining was more intense in endothelial cells and cavernosal muscles of rats in group 2 than in the other groups. NOS activity was increased in the cavernosal tissue after cavernosal denervation, but the pharmacological action of nitric oxide may be impaired.
    BJU International 02/1999; 83(1):101-7. · 3.05 Impact Factor
  • Surgical and Radiologic Anatomy 01/1999; 21(2):15-17. · 1.13 Impact Factor
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    ABSTRACT: This prospective MRI investigation was performed to investigate septum pellucidum (SP) anomalies in 505 (242 male, 263 female) non-psychotic persons. The mean age of the population was 39.179 +/- 0.904 (40.461 +/- 1.395 male, 38 +/- 1.166 female). There was no significant difference between the means of age in the male and female groups (t-test, DF = 479, p > 0.05). The SP anomalies were classified as cavitation anomalies (Type I) and absence of the SP (Type II). Type I anomalies were subdivided into four groups as isolated cavum septi pellucidi (Ia), cavum septi pellucidi et cavum vergae (Ib), anterior small triangular cavities (Ic), and cysts of the SP (Id). The incidences of the anomalies (Type I + Type II) were 17.31%, 1.89%, 7.55%, 3.53%, 7%, 4.55%, 4.76% and 6.06% for the age groups of 0-9, 10-19, 20-29, 30-39, 40-49, 50-59, 60-69 and 70-79 years respectively. The anomalies were very significantly more frequent in the 0-9 years age group than in the other age groups (chi 2 = 9.7858, DF = 1, p < 0.05). The incidences of the anomalies (Type I + Type II) were 6.34%, 5.37%, 7.22% for the whole, male, and female populations, respectively. These values were 1.39%, 1.65% and 1.14% for Type Ia, 2.77%, 2.89% and 2.66% for Type Ib, and 1.78%, 0.83% and 2.66% for Type Ic. Both Type Id and II anomalies were determined in only one case for each group in females (0.2%). There was no significant difference between the incidences of the anomalies in both sexes (chi 2 = 0.45, DF = 1, p > 0.05).
    Surgical and Radiologic Anatomy 01/1999; 21(2):119-23. · 1.13 Impact Factor
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    ABSTRACT: Biopsy and electrical activity recordings of the corpus cavernosum are 2 new diagnostic methods for the evaluation of impotent men. We evaluated the corpus cavernosum ultrastructure and electromyography (EMG) recordings from patients with erectile dysfunction. Twenty erectile dysfunction patients with veno-occlusive dysfunction underwent a detailed history, physical examination, biochemical tests, hormonal analysis, injection of an intracavernous vasoactive agent (60 mg papaverine-HCl), color penile Doppler ultrasonography, cavernosometry/ cavernosography and corpus cavernosum electromyography (CC-EMG). Thirteen patients underwent total vein ligation and 7 had penile prosthesis implantations. Tissue samples were obtained during surgery from both corpora cavernosa and examined by transmission electron microscopy. Control corporal tissue samples were taken from 3 cadavers. In 15 patients, CC-EMG recordings were 15.6 +/- 0.65 microV in the flaccid state, which decreased in 13 patients after papaverine (5.61 +/- 0.25 microV; P < 0.001). Five patients with diabetes mellitus had low amplitudes in the flaccid state (5.26 +/- 0.45 microV), which did not vary significantly after a papaverine injection (4.99 +/- 0.75 microV). The pathology of the corpus cavernosum biopsy specimens revealed a smooth muscle cell thickened basal membrane, dilated rough endoplasmic reticulum, and increased numbers of fibroblasts, but ultrastructurally normal endothelial cells lining the sinusoids. There was no difference between samples from diabetic or nondiabetic patients, or from either side of the corpora cavernosa. The only pathologic change observed in the controls was mitochondrial swelling. CC-EMG is less invasive and a valuable method in patients with erectile dysfunction, whereas no specific findings were observed from penile biopsy specimens.
    International Journal of Urology 06/1998; 5(3):252-5. · 1.73 Impact Factor
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    ABSTRACT: Anomalies of digastric muscle are not very rare. During a routine dissection, it was found on a cadaver that the digastric muscles on both sides had no fibrous slings. It was also observed that the two intermediate tendons crossed over the stylohyoid muscles. Such anomalies should be considered during the evaluation of the floor of the mouth after CT examination of MR imaging, and during surgical procedures as well.
    Morphologie 02/1998; 82(257):5-6.
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    ABSTRACT: In this study, we examined the biopsy patterns of penile tissues taken during operation from patients subjected to surgical treatment for veno-occlusive dysfunction, and evaluated the importance of penile biopsy. We evaluated the findings from 17 patients with venous impotence. Fourteen of them underwent total vein ligation and the rest penile prosthesis implantation. Tissue specimens taken from superficial and deep dorsal veins, tunica albuginea and corpus cavernosum during operation were examined under electron microscope. Tissue specimens taken from 3 cadavers were used as the control group. Although the deep and superficial vein specimens of all patients did not show significant differences, oedema and increase of fibroblasts in collagen fibres of the corpus cavernosum and tunica albuginea were demonstrated. We concluded that penile biopsy as an invasive method does not give enough information about the choice of treatment for erectile dysfunction.
    International Urology and Nephrology 02/1998; 30(3):331-8. · 1.33 Impact Factor
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    ABSTRACT: In the course of a routine dissection of the anterior region of the arm an accessory muscle was observed in the flexor aspect of the right arm of a 64-year-old male cadaver. This accessory muscle, which was considered to be the third head of the biceps brachii muscle originated from the inserting tendon of the deltoid muscle. The muscle gave rise to three tendons as it approached the cubital fossa. Two of these tendons inserted to the bicipital aponeurosis whereas the third tendon inserted to the ulnar head of the pronator teres muscle. Dissection of the forearm on both sides revealed that the palmaris longus muscles was absent bilaterally. Mechanical effects of the insertion tendons of the accessory head of the biceps brachii on the median nerve, especially during the supination of the forearm, are discussed. For radiodiagnostic procedures, MRI images of the accessory head were obtained in the coronal and axial planes.
    Kaibogaku Zasshi 01/1998; 72(6):515-9.
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    ABSTRACT: This article describes a complex variation in the pattern of blood supply to the palm of the hand. In the present case; a) the superficial palmar branch of the radial a. coursed superficial to the thenar mm.; b) The princeps pollicis and radialis indicis aa. arose from the superficial palmar branch of the radial a.; c) The first and second common palmar digital aa. arose as a common trunk from the superficial palmar arch.
    Surgical and Radiologic Anatomy 02/1997; 19(2):123-5. · 1.13 Impact Factor
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    ABSTRACT: The peripheral, extraparotid course and localisation of the marginal mandibular branch of the facial n. is described, with variations, based on the dissection of 40 cadaver half heads. Its anatomical relationships with the ramus of mandible and facial a. are studied and morphometric features are reported. Knowledge of the accurate course and relationship of the marginal mandibular branch should help to protect this nerve from surgical injury.
    Surgical and Radiologic Anatomy 02/1997; 19(5):311-4. · 1.13 Impact Factor
  • Surgical and Radiologic Anatomy 01/1997; 19(2):123-125. · 1.13 Impact Factor
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    ABSTRACT: In the angiography performed for a clinical diagnosis, a unique case of "agenesis of the celiac trunk" was encountered in a 42-year-old Turkish male. There was instead an artery which arose from the aorta at the level of the first lumbar vertebra, and supplied blood to the territory of both the celiac and superior mesenteric arteries by giving rise to the splenic, the jejunal, the ileal, the pancreaticoduodenal, the proper hepatic and the left gastric arteries, consecutively.
    Kaibogaku Zasshi 05/1995; 70(2):180-2.

Publication Stats

79 Citations
5 Downloads
1k Views
14.34 Total Impact Points

Institutions

  • 1994–2005
    • Hacettepe University
      • • Department of Anatomy
      • • Faculty of Medicine
      Ankara, Ankara, Turkey
  • 1999
    • Ankara University
      • Department of Anatomy
      Ankara, Ankara, Turkey
    • Ankara Numune Training and Research Hospital
      Engüri, Ankara, Turkey
  • 1994–1998
    • Gulhane Military Medical Academy
      • Department of Anatomy
      Ankara, Ankara, Turkey