Haq then looked to see whether there was any significant link between the number of times they had smiled or laughed upon internal capsule-nucleus accumbens stimulation and their obsessive-compulsive disorder outcome .
哈克则着眼于患者在深部脑部刺激下出现微笑、大笑的次数与他们强迫症症状缓解之间是否存在重大关联。
Thus , whereas the nucleus accumbens was already known to be the reward center of the brain , this particular " sweet spot " may be part of the brain 's smile , laugh , and euphoria center , haq and his colleagues concluded .
