Psychophysiological Study for the Promotion of Learning in Chidren with Learning Disability

(1)采用多镜头记录系统对学习障碍儿童的视觉认知过程进行评价。在视觉认知方面表现出一定困难的儿童，头部和眼睛旋转的协调受到干扰。(2)认知过程和事件相关电位一系列重复刺激中包含的罕见刺激会引发错配负性（MMN）。通过记录这样一个与MMN相关的事件，可以检测到大脑内的自动信息处理。在固定的中间刺激间隔条件下，智力低下儿童可以获得MMN。在固定的刺激间隔情况下，智力低下儿童的自动辨证有效。但是，在随机间歇刺激条件下，智力低下儿童的MMN变得模糊。这些结果表明，智力低下儿童在随机呈现刺激序列的自动辨别情况下存在同样的困难。(3)背景脑电图评价脑功能背景脑电图反映了脑活动的功能状态。儿童时期背景脑电图谱结构随年龄的变化而变化。这些脑电图受到感觉运动皮层的随意运动的影响。并对缺氧时的脑电图进行补充检查。(4)模拟低视力条件下的视向，检测正常成人和低视力者的头部和眼动协调动作。在低视力条件下，与正常视力相比，视觉方向变得依赖于头部运动。

(1) Visuo-Cognitive Process evaluted by the multicamera recording systemVisuo-Cognitive process were evaluated by using the multicamera recording system in children with learing disability or learning problems. Coordination of head and eye rotation were disturbed in children who showed some difficulty in visuo-cognitive aspects.(2) Cognitive process and event related potentialsRare stimulus included in a series of repetitive stimuli provokes mismatch negativity (MMN). Automatic information processing within the brain could be detected by recording such an event related MMN.In the fixed interstimulus interval condition, MMN could be obtained from the children with mental retardation. Automatic differentiation in children with mental retardation works effectively in the fixed interstimulus interval situation. But, in the randam interstimulus interval condition, MMN obtained from the children with mental retardation became obscure. These result suggest that children with mental retardation had same difficulties in the situation of automatic discrimination of randomly presented stimulus series.(3) Brain functioning evaluated by background EEGBackground EEG reflects the functional atate of the brain activities. Spectral structure of background EEG changes according to the aging during childhood. Those EEG are affected by the volunary movement in sensory motor cortex. Furthermore, EEG in hypoxia were supplementally examined.(4) Visual orientation in the simulated condition of low visionCoordinate action of the head and eye movement are examined in normal adult and person with low vision. In the condition of low vision, visual orientation became to depend on head mavement comparing to the normal vision.