جستجوی مقالات مرتبط با کلیدواژه « توانبخشی عصبی » در نشریات گروه « پزشکی »

Upper limb functional disability is a common after-effect among stroke survivors. The main goal of this study was to present a visual biofeedback protocol to identify a model based on synergy patterns of the elbow muscles for motor learning and rehabilitation of stroke survivors with hemiparesis.

First, kinematic data related to the position of four joints and the surface electromyography signal of four muscles involved in the arm movement in the transverse plane were collected, preprocessed, and synchronized. In the next step, muscle synergy patterns were extracted using the Hierarchical Alternating Least Squares (HALS) method, and at the same time, kinematic data were recorded by the modified MediaPipe algorithm. Finally, a deep learning model based on the Gated Recursive Unit (GRU) was used to map between them. The model output was regarded as the visual biofeedback trajectory to conduct the exercise therapy by the patients.

The evaluations showed that the path produced by the proposed model is potentially suitable for visual biofeedback. Moreover, the artificial neural network based on GRU architecture has had the best performance in generating the visual biofeedback trajectory.

Experimental and clinical evaluations will show that participants can acceptably follow the visual trajectory generated by the model. Therefore, this mechanism can be used to improve and develop biofeedback systems to accelerate the functional rehabilitation of patients with hemiplegia caused by ischemic stroke along with other conventional rehabilitation methods.

Patients with facial palsy lose normal facial muscle movement in the paralyzed side. A condition which is treated using different methods of treatment. Over of a period of five years, a total of 80 facial palsy cases referred to the hospital. 22 were treated by high dose of prednisolon and physiotherapy. 58 cases were treated by different surgical procedures, that 38 cases had developed the condition due to trauma, and the remaining 20 due to bell's palsy, brain tumor, or congenital conditions. Surgical procedures used in treating these patients were end to end anastomosis, nerve graft between the severed nerve, neurotization of the contralateral healthy side to the paralyzed side, and nurotization with hypoglossal or accessory nerve of the paralyzed side. Muscle transplant to the paralyzed region, such as temporal or free gracilis muscle was also used in some patients. In acute phase of bell's palsy, after head trauma or facial palsy because of very cold weather, prednisolon in high dose and neuromuscular rehabilitation for some patients showed very good results. Operative technique using nerve graft or end to end anastomosis of the severed nerve showed very good results, and neurotization of the paralyzed side to the contralateral healthy side gave acceptable to good results. The use of muscles or hypoglossal nerve of the paralyzed region did not result in symmetric facial muscle movement. Our data shows the best operative technique for patients with chronic facial palsy is the use of free gracilis muscle. Patients treated with this method were able to regain their involuntary and symmetric facial muscle movement.