Implementation of an Embedded Web Server Application for Wireless Control of Brain Computer Interface Based Home Environments.

Brain Computer Interface (BCI) based environment control systems could facilitate life of people with neuromuscular diseases, reduces dependence on their caregivers, and improves their quality of life. As well as easy usage, low-cost, and robust system performance, mobility is an important functionality expected from a practical BCI system in real life. In this study, in order to enhance users' mobility, we propose internet based wireless communication between BCI system and home environment. We designed and implemented a prototype of an embedded low-cost, low power, easy to use web server which is employed in internet based wireless control of a BCI based home environment. The embedded web server provides remote access to the environmental control module through BCI and web interfaces. While the proposed system offers to BCI users enhanced mobility, it also provides remote control of the home environment by caregivers as well as the individuals in initial stages of neuromuscular disease. The input of BCI system is P300 potentials. We used Region Based Paradigm (RBP) as stimulus interface. Performance of the BCI system is evaluated on data recorded from 8 non-disabled subjects. The experimental results indicate that the proposed web server enables internet based wireless control of electrical home appliances successfully through BCIs.

An asynchronous wheelchair control by hybrid EEG-EOG brain-computer interface.

Wheelchair control requires multiple degrees of freedom and fast intention detection, which makes electroencephalography (EEG)-based wheelchair control a big challenge. In our previous study, we have achieved direction (turning left and right) and speed (acceleration and deceleration) control of a wheelchair using a hybrid brain-computer interface (BCI) combining motor imagery and P300 potentials. In this paper, we proposed hybrid EEG-EOG BCI, which combines motor imagery, P300 potentials, and eye blinking to implement forward, backward, and stop control of a wheelchair. By performing relevant activities, users (e.g., those with amyotrophic lateral sclerosis and locked-in syndrome) can navigate the wheelchair with seven steering behaviors. Experimental results on four healthy subjects not only demonstrate the efficiency and robustness of our brain-controlled wheelchair system but also indicate that all the four subjects could control the wheelchair spontaneously and efficiently without any other assistance (e.g., an automatic navigation system).

Effects of Acupuncture at Ex-HN1 and Siguan Points on P300 in Post-stroke Patients Following Depression / 中国康复理论与实践

@#Objective To observe the change of P300(EP) evoked potentials in pre-and-post acupuncture on post-stroke patientsv following depression.Methods According to Hamiltion Rating Scale for Depression(HRS-D),ninty post-stroke patients were divided into two groups: the depression group(n=63) received acupuncture at Ex-HN1 and Siguan Points and the non-depression group(n=31).After assessed and grouped by HRS-D,and one acupuncture therapeutic course for the depression group,two groups' subjects were tested with P300 potentials.Results Before treatment,the latency of P3 of P300 potentials was longer and the amplitude of P3 was lower in the patients of the depression group compared with the cases in the non-depression group;after the acupuncture treatment,the latency of P3 decreased significantly(P<0.01),and the amplitude of P3 increased significantly(P<0.05) in the patients of the depression group.Conclusion P300 potentials test can help find cognitive dysfunction in post-stroke patients following depression at early stage,and acupuncture treatment in time can lessen or eliminate depression motion of post-stroke patients.

Study on P300 potentials in patients with first cerebral stroke / 中国实用内科杂志

Objective To explore the change of P300 potentials in first cerebral stroke patients,and to find the objective index in judging the cognition in these patients.Methods P300 potentials test was used for sixty patients with their first episode of single loci stroke and sixty-two healthy people.The results were compared in the two groups.Results Latency periods of N 2 and P 3 of P300 potentials in cerebral stroke group were longer than those in the controls,the amplitude of P 3 of P300 potentials in cerebral stroke group was lower than that in the controls.There was significant difference between the two groups(P0.05).Conclusion P300 potentials can reflect the cognition in cerebral stroke patients,which has remarkable clinical value in making reasonable treatment plan.

Cognitive Function and P300 Potentials in First-Episode Schizophrenia Treated with Quetiapine and Risperidone / 中国心理卫生杂志

Objective:To compare the effects of quetiapine and risperidone on cognitive function of first-episode schizophrenic patients.Methods:A randomized comparative clinical design was applied to compare the cognitive function of 67 patients with first-episode schizophrenia treated with quetiapine(n=35,25-750mg/d)and risperidone(n=32,1-7rag/d)before and after 12-week treatment.PANSS,WMS and P300 were used to evaluate adverse effects of drags and cognitive function.Results:The Long-term memory,Short-term memory,Immediate memory,Memory Quotient of first-episode schizophrenia were damaged obviously.Latency periods of P_2、N_2 and P_3 of P_(300) potentials with first-episode schizophrenia group were longer than the control group,The amplitudes of P_2 and P_3 of P_(300) potentials with first-episode schizophrenia group were lower than the control group(P