The influence of the cross-modal emotional pre-preparation effect on audiovisual integration.

Previous studies have shown that the cross-modal pre-preparation effect is an important factor for audiovisual integration. However, the facilitating influence of the pre-preparation effect on the integration of emotional cues remains unclear. Therefore, this study examined the emotional pre-preparation effect during the multistage process of audiovisual integration. Event-related potentials (ERPs) were recorded while participants performed a synchronous or asynchronous integration task with fearful or neutral stimuli. The results indicated that, compared with the sum of the unisensory presentation of visual (V) and auditory (A) stimuli (A+V), only fearful audiovisual stimuli induced a decreased N1 and an enhanced P2; this was not found for the neutral stimuli. Moreover, the fearful stimuli triggered a larger P2 than the neutral stimuli in the audiovisual condition, but not in the sum of the combined (A+V) waveforms. Our findings imply that, in the early perceptual processing stage and perceptual fine processing stage, fear improves the processing efficiency of the emotional audiovisual integration. In the last cognitively assessing stage, the fearful audiovisual induced a larger late positive component (LPC) than the neutral audiovisual. Moreover, the asynchronous-audiovisual induced a greater LPC than the synchronous-audiovisual during the 400-550 ms period. The different integration effects between the fearful and neutral stimuli may reflect the existence of distinct mechanisms of the pre-preparation in terms of the emotional dimension. In light of these results, we present a cross-modal emotional pre-preparation effect involving a three-phase emotional audiovisual integration.

The disorder of emotional audiovisual integration of addiction / 中华行为医学与脑科学杂志

The drug cues of multi-sensory have higher reliability and ecological validity,and play a key role in the substance and behavioral addiction. However,the comprehensive discussion on the relation-ship of addiction and the disorder of emotional audiovisual integration was very limited so far. Reviewing re-cent studies on multi-sensory integration of substance and behavioral addictions,it had been found that both two addiction groups had disorders of audiovisual integration,especially the negative emotion. Neuroimaging studies found that the abnormal activation on prefrontal cortical during emotional audiovisual integration com-monly tended to live in substance and behavioral addictions,suggesting that the disorder of emotional audiovi-sual integration for addictions might be related to the weakening of cognitive control. Further improvements of the neural mechanism of emotional audiovisual integration disorder of addictions,as well as the more ecologi-cally predictive indicators and clinical diagnosis criteria are needed.

Space-time characteristic and therapeutic strategy of traumatic brain injury attributable to Chinese Wenchuan earthquake / 中华创伤杂志

Objective To analyze the space-time characteristic of traumatic brain injury (TBI) caused by Chinese Wenchuan earthquake and discuss opportunity and mode of medical intervention. Methods A retrospective study was done on 92 patients with TBI admitted into our department during Chinese Wanchuan earthquake.Results All 92 patients came from champaign located at northwest of Chengdu. Of all, 76 patients were admitted within 12 hours after earthquake. Surgical operation Wag done on 10 patients, of whom 3 died.Conclusions In the early period after earthquake, TBI patients make a large proportion and have fast change of injury severity. All patients come from champaign with conven-ient transportation. For TBI patients, early emergent operation after admission can significantly elevate success rate of mcdical intervention.

Realization of assist system for the blind by artificial vision / 医疗卫生装备

This paper introduces an assist system for the blind.It utilizes ultrasonic to measure the distance and speed.Then the distance signal is converted to position of slip block and the speed signal is converted to tone.The main function of this sytem is to assist the blind to determine distance and speed of objects.It is practical,Simple and inexpensive.