Peresleni L I, Rozhkova L A, Ryabchikova N A
Scientific Research Institute of Defectology, Academy of Pedogogical Sciences of the USSR [APN SSSR], Moscow.
Neurosci Behav Physiol. 1991 Mar-Apr;21(2):160-5. doi: 10.1007/BF01182893.
The features of orientation reaction (OR) and the background EEG were investigated with the purpose of studying the neurophysiological mechanisms of the disturbance of voluntary attention in children aged 6.5-9 years with learning difficulties caused by delayed mental development (DMD). A decrease in the expressivity of components of the OR as compared with the norm, discovered in a situation of involuntary attention against a background of insufficiently developed cortical rhythmicity in the alpha range, was compensated for given an increase in the significance of the stimuli. These facts support the hypothesis of a deficit in regulatory corticofugal influences in children with DMD. The inadequacy of the engagement of central regions of the cortex characteristic of children with DMD in the realization of OR in a situation of directed attention can be regarded as a reflection of disturbances of the integrative activity of the brain.
为研究智力发育迟缓（DMD）导致学习困难的6.5 - 9岁儿童随意注意障碍的神经生理机制，对定向反应（OR）特征和背景脑电图进行了研究。在α波范围内皮质节律发育不足的背景下，于非随意注意状态下发现，与正常情况相比，OR成分的表现力下降，但随着刺激重要性增加这种情况得到了补偿。这些事实支持了DMD患儿调节性皮质离心影响存在缺陷的假说。DMD患儿在定向注意状态下实现OR时，其皮质中央区域参与不足，可被视为大脑整合活动障碍的一种表现。
