Tegnér R
Department of Neurology, Karolinska Hospital, Stockholm, Sweden.
J Neurol Neurosurg Psychiatry. 1989 May;52(5):669-70. doi: 10.1136/jnnp.52.5.669.
The response to tactile stimuli at the threshold range was studied with a forced choice technique in two patients with stable parietal lesions. The most unexpected finding was that very weak stimuli were significantly better detected on the side contralateral to the lesion. The psychometric functions were also less steep and reached a ceiling at below 100% correct responses. The findings are interpreted as due to the combined effect of decreased sensitivity to alterations in stimulus strength and decreased local attention.
采用强制选择技术，对两名患有稳定型顶叶病变的患者在阈值范围内对触觉刺激的反应进行了研究。最出乎意料的发现是，在病变对侧能显著更好地检测到非常微弱的刺激。心理测量函数也较平缓，在正确反应率低于100%时达到上限。这些发现被解释为是对刺激强度变化的敏感性降低和局部注意力下降共同作用的结果。
