Following transient ischemia of the brain, the coupling between somatosensory activation and the hemodynamic-metabolic response is abolished for a certain period despite the partial recovery of somatosensory evoked responses. To determine whether this disturbance is due to alterations of the stimulus-induced neuronal excitation or to a breakdown of the coupling mechanisms, cortical spreading de...

About 15% of migraine patients suffer from migraine with aura. Most patients have visual or sensory symptoms. The assumed mechanism of aura in humans is a phenomenon called spreading cortical depression (1,2). Cortical spreading depression is characterized by a short cortical neuronal excitation followed by long-lasting depression. Both excitation and depression travel across the cortex at a sl...

Ketamine (KET) induced blockade of cortical spreading depression (CSD) declines with repeated KET applications in a way suggesting the development of tolerance. Possible mechanism of this process was studied in 31 rats anestheized with pentobarbital. CSD was elicited by injection of 1µl of 5% KCl into cortex at 15 min intervals and monitored by recording the accompanying slow potential waves....