Browsing by Author "Marinkovic, S. (7005202323)"

Anastomoses in the region of the posterior cerebral arteries were found in all of 40 brains examined. Anastomoses were channel-like, plexiform or combined. The former measured from 0.07 mm to 1.1 mm in diameter. They were most often found among the interpeduncular perforating vessels (71.2%), and between the branches of the posterior and anterior cerebral arteries (75.7%). The functional significance of the anastomoses is discussed.

The cavernous region was examined in 20 fetuses, injected with Micropaque, and in 5 adults. The lateral wall of the cavernous region in fetuses was noticed to have four layers. The superficial membrane represents the dural sheath. The second membrane of dense connective tissue involves the trochlear nerve. The third layer, formed by loose connective tissue, involves the oculomotor nerve, and the ophthalmic and maxillary division. The fourth layer, which represents the lateral wall of the cavernous sinus, involves the abducent nerve. The meningohypophyseal trunk can be complete or incomplete. The inferolateral trunk and its branches were found to supply the cavernous portions of the mentioned cranial nerves. The obtained data make the anatomic basis for neurosurgical operations in the cavernous region. © 2001 Harcourt Publishers Ltd.

The cavernous region was examined in 20 fetuses, injected with Micropaque, and in 5 adults. The lateral wall of the cavernous region in fetuses was noticed to have four layers. The superficial membrane represents the dural sheath. The second membrane of dense connective tissue involves the trochlear nerve. The third layer, formed by loose connective tissue, involves the oculomotor nerve, and the ophthalmic and maxillary division. The fourth layer, which represents the lateral wall of the cavernous sinus, involves the abducent nerve. The meningohypophyseal trunk can be complete or incomplete. The inferolateral trunk and its branches were found to supply the cavernous portions of the mentioned cranial nerves. The obtained data make the anatomic basis for neurosurgical operations in the cavernous region. © 2001 Harcourt Publishers Ltd.

Background: Identification and anatomic features of the feeding arteries of the arteriovenous malformations (AVMs) is very important due to neurologic, radiologic, and surgical reasons. Materials and methods: Seventy-seven patients with AVMs were examined by using a digital subtraction angiographic (DSA) and computerised tomographic (CT) examination, including three-dimensional reconstruction of the brain vessels. In addition, the arteries of 4 human brain stems and 8 cerebral hemispheres were microdissected. Results: The anatomic examination showed a sporadic hypoplasia, hyperplasia, early bifurcation and duplication of certain cerebral arteries. The perforating arteries varied from 1 to 8 in number. The features of the leptomeningeal and choroidal vessels were presented. The radiologic examination revealed singular (22.08%), double (32.48%) or multiple primary feeding arteries (45.45%), which were dilated and elongated in 58.44% of the patients. The feeders most often originated from the middle cerebral artery (MCA; (23.38%), less frequently from the anterior cerebral artery (ACA; 12.99%), and the posterior cerebral artery (PCA; 10.39%). Multiple feeders commonly originated from the ACA and MCA (11.69%), the MCA and PCA (10.39%), the ACA and PCA (7.79%), and the ACA, MCA and PCA (5.19%). The infratentorial feeders were found in 9.1% of the AVMs. Contribution from the middle meningeal and occipital arteries was seen in 3.9% angiograms. Two cerebral arteries had a saccular aneurysm. The AVM haemorrhage appeared in 63.6% of patients. Conclusions: The knowledge of the origin and anatomic features of the AVMs feeders is important in the explanation of neurologic signs, and in a decision regarding the endovascular embolisation, neurosurgical and radiosurgical treatments. Copyright © 2018 Via Medica.

Hypoplasia of the proximal (A1) segment of the anterior cerebral artery (ACA) has been examined in 50 human brains and on 8 selected carotid arteriograms. Hypoplasia has been found in 22% of the cases. Two types of this phenomenon exist, namely the mild and extreme hypoplasia. Mild hypoplasia has been noticed in 14% of the specimens. The hypoplastic vessel has ranged from 1.3 to 1.9 mm in diameter (average 1.6 mm) and it was from 0.6 to 0.9 mm smaller than the opposite A1 portion. Extremely hypoplastic proximal segment has been present in 8% of the cases. It has varied from 0.3 to 1.1 mm in size (average 0.9 mm) and has been more than 1 mm smaller than the opposite proximal segment. Both mild and extreme hypoplasia have been associated in 81.8% of the cases with the corresponding variations or malformations of the anterior cerebral, posterior cerebral, posterior communicating and basilar arteries.

11 encephalometric parameters of the corpus callosum and medial hemispheric surface have been measured on 50 human brains fixed in 7% formaline solution. The measurement of linear parameters has been made by using a standardized encephalometric system of reference, based on the bicommissural line which has been widely used in neurosurgery. The applied statistical procedures have shown that the following variables are the most successful in the evaluation and prediction of the change of the midsagittal cross-sectional corpus callosum area in the following order: the thinnest part of the corpus callosum, the corpus callosum length and medial hemispheric border. Their change for the unit value causes an average change of the corpus callosum midsagittal section surface area for the value of the partial regression coefficient with which they are connected. The chosen variables explain only the 45% variability of the cross-sectional corpus callosum surface area, and the remaining variability belongs to some other variables which have not been included in present investigation. The variability of the hemispheric length (74%), the corpus callosum length (65%) and medial hemispheric border length (64%) is most adequately explained on the basis of chosen variables.

Background and Aim: In the present study, we have hypothesized that volume changes of the caudate nucleus, putamen, globus pallidus, hippocampus, thalamus, and lateral ventricle in newly-diagnosed, male PTSD patients without therapy are more pronounced in those with headaches. To confirm or reject our hypothesis, we have undertaken an extensive study of forty-nine PTSD patients. Patients and Methods: To confirm or reject our hypothesis, we have undertaken an extensive study of forty-nine PTSD male patients that underwent MRI scanning immediately upon admittance for the treatment. Based on headache frequency, they were classified into three groups: group 1 included patients with headaches at least twice a week; group 2 consisted of patients with headaches less than twice a week; and group 3 consisted of patients without headaches. All MRI scans underwent software-based volume compute and statistical processing. Results: 39 out of 49 patients with PTSD suffered from headaches. Bilaterally, volume decreases were noted in groups 1 and 2 compared to group 3 for the caudate nucleus, putamen, hippocampus and lateral ventricle. Differences in globus pallidus and thalamus among groups appeared to be insignificant. Conclusion: The present study revealed a bilateral volume decrease of the caudate nucleus, putamen and hippocampus in PTSD male subjects without therapy. Intensity of volume alterations correlated with Hamilton's depression rating score; regression analysis uncovered correlated changes in the caudate nucleus, putamen and hippocampus, and an inverse correlation with the volume of the lateral ventricle in the PTSD patients. © Georg Thieme Verlag KG Stuttgart, New York.