“A study found going without sleep for just one night causes

“A study found going without sleep for just one night causes changes in the brain similar to those that occur after a blow to the head”
我有些看不懂前面“A study"后面的found和”one night"后面的causes好像形成了双谓语,这样可以?
还有"found"后面的going是什么意思?