clinico ricerca Collection | A wearable EEG-based Assistive BCIs sistema for riabilitazione post-ictus - ictus Center

ricerca background
The combination of BCI and auxiliary robot is a new trattamento for riabilitazione post-ictus. However, most of the existing studio is based on complex sistema setups, expensive and bulky equipment. In this studio, a wearable EEG interfaccia cervello-computer sistema for mano function riabilitazione is designed to do clinial trial. This sistema is composed of customized EEG cap, commercial amplifier, and mano esoscheletro. In addition, the sistema includes the visual interface for the convenience of users. The trial enrolled six healthy participants and two ictus patients to verify the sicurezza and efficacia of the sistema.

Method

To verify the sicurezza and efficacia of the sistema, 6 healthy subjects(1 female and 5 males, aged 23±3 years old) from Shanghai Jiao Tong University and 2 ictus patients(all right mano affected) from the riabilitazione department of Huashan ospedale were recruited to participate in the studio. A 6-minute allenamento sessione was conducted for each subject, in which the subjects performed right-mano motor execution(ictus paziente’s affected mano to make a movement attempt) according to visual cues. A red rectangle appears on the right or center of the screen, indicating action execution (or attempt) or rest, respectively. The task lasts for 4 seconds until the white cross disappears. It is recommended that healthy subjects repeat clenching and extending fists 3-4 times, and ictus patients are instructed to make motor attempts during motor tasks. The online test was similar to the allenamento sessione, except that all red rectangles appeared in the center of the screen, which allowed subjects to choose to move their mano (or esercizio attempt) or rest at will. Test results are provided to users visual and proprioceptive feedback via a screen and mano esoscheletro shortly after task completion. There are three online test runs, each containing 20 trials. Each subject may rest between runs. All subjects were asked to refrain from any additional facial or braccio muscle movement throughout the experiment.

Result

The average accuracy of offline and online allenamento is 84.91% and 79.38%, respectively. Seven subjects had online accuracy of more than 70%, five more than 80%, and one more than 90%.

The Event-related Spectral Perturbation(ERSP) showed that the sensorimotor cortex was activated in both α and β bands during right mano movement allenamento, with stronger activation on the same side. Meanwhile, as expected, the uncontrolled state showed no significant activation on either the C3 or C4 channels. In the online test, both the left and right hemispheres were activated to perform right-handed movements.

 

Conclusion

This studio demonstrates a wearable interfaccia cervello-computer sistema for mano function riabilitazione after ictus. The results of motor task differentiation preliminarily confirm the feasibility of this dispositivo, which shows great clinico applicazione potential.

Reference: Qin Z, Xu Y, Shu X, et al. eConHand: A Wearable interfaccia cervello-computer sistema for riabilitazione post-ictus[C]// 2019 9th internazionale IEEE/EMBS Conference on Neural Engineering (NER). IEEE, 2019.