| A false color image of an autoradiogram made from a section of rat brain using the quantitative Iodo-14C-antipyrine method for measuring rCBF. Green represents vascular hypoperfusion such as in the contused cortex, ventricles, ventricles, corpus callosum and pia mater. Purple represents hyperperfusion and is notable in cortex lateral to the impact site. The rCBF in the hemisphere contralateral to the contusion is not different from normal rat brain. Administration of 2 mg/kg. of amphetamine produced a significant global increase of CBF but had no effect on either the ischemic contused area or the area of hyperperfusion. This suggests a vasoparalysis in these areas. Note the correspondence in the shape of ischemic tissue and the cyst illustrated in Figure 1. |
