Twiglike Middle Cerebral Arteries

Biaxial and failure properties of passive rat middle cerebral arteries.

Rodents are commonly used as test subjects in research on traumatic brain injury and stroke. However, study of rat cerebral vessel properties has largely been limited to pressure-diameter response within the physiological loading range. A more complete, multiaxial description is needed to guide experiments on rats and rat vessels and to appropriately translate findings to humans. Accordingly, w...

Middle cerebral artery variations: duplicated and accessory arteries.

PURPOSE Our goal was to analyze the anatomic similarity between the duplicated middle cerebral artery (MCA) and the accessory MCA and their relationship to the early branches of the MCA. METHODS We reviewed stereoscopic angiograms of duplicated MCAs in four patients and accessory MCAs in four patients with reference to the origin, size, and cortical supply of these anomalous vessels, along wi...

Transient embolic occlusion of the middle cerebral and internal carotid arteries in cerebral apoplexy.

Cerebral Resistance Arteries

were independently controlled by two servo-controlled pumps, and changes in the diameter of the segment were registered by an automated video technique. In the absence of flow, these segments maintained their diameter when intraluminal pressure was changed over the range 30-90 mm Hg. When intraluminal pressure was low (30 mm Hg), flow at 20 pl/min caused dilation. This is half the rate of flow ...

Cerebral Arteries and Cerebral Microvascular Pressure

are major determinants of local microvascular pressure. Recent studies have shown that resistance of large arteries and cerebral microvascular pressure are affected by several physiological stimuli, including changes in systemic blood pressure, increases in cerebral metabolism, activity of sympathetic nerves, and humoral stimuli such as circulating vasopressin and angiotensin. Stimuli such as s...