The incidence of aneurysmal subarachnoid hemorrhage is about 10-11 cases per 100,000 inhabitants. The true incidence of multiple aneurysms is not known, however, according to previous studies it may vary between 20% and 30%. The association of arteriovenous malformation and cerebral aneurysm is well documented and varies between 20% and 30%. A case is described of a 47-year-old female presentin...

An investigation was conducted into the differences between macrosmatic and microsmatic animals of arterial supply in the area of the olfactory trigone and the anterior perforated substance. A brain of domestic cat was taken as an example of a macrosmatic animal and a brain of baboon as an example of a microsmatic animal. The cerebral blood vessels of the cadavers of 30 cats and 11 baboons were...

Anterior cerebral artery (ACA) is one of the two terminal branches of internal carotid artery that supplies orbitofrontal and medial hemispheric portions of the brain. ACA is topographically and angiograpically divided into a precommunicating (A1) and a postcommunicating (A2, also called as pericallosal artery) parts. An azygos (occurring singly) pericallosal artery in one of the most frequent ...

In this study we analysed the relationship between damage in the territory of the posterior cerebral artery and semantic knowledge, with special reference to category dissociations. Twenty-eight posterior cerebral artery stroke patients (18 left, 8 right and 2 bilateral posterior cerebral artery infarctions) completed a neuropsychological battery aimed at assessing semantic knowledge. The batte...

INTRODUCTION Simultaneous bilateral cerebrovascular infarction is relatively rare and its initial presentation as a space-occupying lesion is extremely uncommon. However, bilateral infarction can result from unilateral occlusion of anomalous cerebral vasculature. CASE PRESENTATION We report the case of a man presenting with lower limb weakness and aphasia of acute onset with initial computeri...

BACKGROUND AND PURPOSE The purpose of this study was to assess the ability of transcranial Doppler ultrasonography to detect selective circulatory changes during cognitive activity. METHODS We measured cerebral artery flow velocity in 21 normal volunteers by transcranial Doppler ultrasonography during rest followed by cerebral activation. Mean and peak systolic flow velocities of the anterior...