https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0CDMQFjAD&url=http%3A%2F%2Fwww.baike.com%2Fwiki%2F%25E6%258E%258C%25E5%2580%25BE%25E8%25A7%2592&ei=QIS-VI-LBI7ksASzrYKYDw&usg=AFQjCNE-1v-xIDp1i6bF3MSOhN8Fmklt7g&sig2=MPN_LiPPeoMjNU-N9RGfbQ
正常情況:橈腕關節關節麵向掌側傾斜10-15°,向尺側傾斜20-25°