摘要: Cerebral ischemia induces excess release of glutamate and an increase in the intracellular Ca2+ concentration, which provoke catastrophic enzymatic processes leading to irreversible neuronal injury. Histamine plays role neurotransmitter central nervous system, histaminergic fibers are widely distributed brain. In cerebral ischemia, histamine from nerve endings has been shown be enhanced by facilitation its activity. An inhibition activity aggravates histologic outcome. contrast, intracerebroventricular administration improves aggravation, whereas blockade H2 receptors ischemic Furthermore, enhances dopamine. These findings suggest that provides beneficial effects against damage suppressing excitatory neurotransmitters. However, action facilitates permeability blood-brain barrier shows deleterious on edema.