Aneurysms on the vessels at the front of the brain (anterior circulation – blue bars) are less dangerous than aneurysms on the back part of the brain (posterior circulation ... blocking blood flow ...

“For the first time, we found that better blood flow ... circulation and biomechanics of the hippocampus area that is involved in remembering and learning function within the brain.

A second theory posits that excessive arteriolar vasoconstriction results in decreased blood flow, ischemia ... sympathetic innervation of the posterior circulation. One characteristic of this ...