Bosses at animal rights group People For The Ethical Treatment of Animals (PETA) are offering SHARON STONE a free brain scan - in an effort to improve her compassion.PETA President Ingrid Newkirk has written to the movie star, suggesting her refusal to stop wearing fur and recent ill-advised comments she made about the Chinese earthquake could be symptoms of an underdeveloped brain.Acknowledging Stone is an intelligent woman, PETA bosses fear the actress may need to work on her compassionate nature. And, after she was forced to apologise to China for suggesting the country's recent earthquake tragedy was "karma" for the way the nation treat Tibetans, PETA chiefs feel Stone might be ready to undergo medical tests.In her letter, Newkirk writes, "Given that millions of people... were killed, injured, and left homeless by the recent earthquake in China, everyone was shocked to hear you dismiss the devastating effects of this disaster."However, your cavalier attitude did not come as a surprise to us. We are used to the indifference that you flaunt and the callous remarks that you make about the suffering and death of the animals whose fur you wear so often."Scientific studies suggest that the prefrontal regions of the brains of people who lack empathy might be underdeveloped. Here's our offer: Would you allow PETA to pay for a scan of the prefrontal region of your brain to determine if comments and actions that seem to demonstrate a lack of empathy are the result of a physical defect?"The star suffered a brain haemorrhage in 2001 but has since fought her way back to health.