Acupuncture Points ; Acupuncture Therapy ; Adolescent ; Female ; Humans ; Tremor ; therapy

Tremor is an involuntary and repetitive swinging movement of limb, which can be regarded as a periodic disturbance in tremor suppression system based on functional electrical stimulation (FES). Therefore, using repetitive controller to adjust the level and timing of FES applied to the corresponding muscles, so as to generate the muscle torque opposite to the tremor motion, is a feasible means of tremor suppression. At present, most repetitive control systems based on FES assume that tremor is a fixed single frequency signal, but in fact, tremor may be a multi-frequency signal and the tremor frequency also varies with time. In this paper, the tremor data of intention tremor patients are analyzed from the perspective of frequency, and an adaptive repetitive controller with internal model switching is proposed to suppress tremor signals with different frequencies. Simulation and experimental results show that the proposed adaptive repetitive controller based on parallel multiple internal models and series high-order internal model switching can suppress tremor by up to 84.98% on average, which is a significant improvement compared to the traditional single internal model repetitive controller and filter based feedback controller. Therefore, the adaptive repetitive control method based on FES proposed in this paper can effectively address the issue of wrist intention tremor in patients, and can offer valuable technical support for the rehabilitation of patients with subsequent motor dysfunction.
Humans ; Wrist ; Tremor/therapy* ; Movement ; Computer Simulation ; Electric Stimulation

Acupuncture Points ; Acupuncture Therapy ; Essential Tremor ; therapy ; Humans ; Male ; Young Adult

Acupuncture Points ; Acupuncture Therapy ; instrumentation ; methods ; Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Tremor ; therapy

OBJECTIVETo observe clinical therapeutic effect and safety of combination of acupuncture with medication for treatment of spontaneous tremor.

METHODSWith randomized controlled trial method, 26 cases of spontaneous tremor were divided into a treatment group (n = 13) treated with acupuncture plus western medicine, and a control group (n = 13) treated with simple western medicine. They were treated for 6 weeks. Scores of tremor before and after treatment and adverse effects were investigated.

RESULTSThe total effective rate of 84.6% in the treatment group was better than 61.5% in the control group (P < 0.05) and there was less adverse effects in the treatment group.

CONCLUSIONCombination of acupuncture with medication is a safe and effective therapy for spontaneous tremor.

Deep Brain Stimulation ; methods ; Essential Tremor ; therapy ; Female ; Humans ; Middle Aged

Adult ; Deep Brain Stimulation ; Essential Tremor ; physiopathology ; therapy ; Female ; Humans ; Male ; Middle Aged ; Subthalamic Nucleus ; physiology

Posttraumatic tremor is often one of the causes of disability in head injury patients. Usually, pharmacotherapy for this type of tremor is not effective. Since early 1970s, surgical ablation of the ventral thalamus has been used to treat various types of tremor. Nowadays, deep brain stimulation (DBS) confirms its efficacy in alleviating different forms of tremor, including posttraumatic tremor. Such therapy has been reported achieving around 80% success rate in the treatment of posttraumatic tremor. These successful results suggest that the application of DBS therapy can be considered as one of the alternative treatments for minimizing the tremor occurring from different pathologies.
Adult ; Craniocerebral Trauma ; complications ; Deep Brain Stimulation ; methods ; Electrodes ; Humans ; Male ; Tremor ; therapy

An automatic control system was designed to suppress pathological tremor on wrist joint with two degrees of freedom (DoF) using functional electrical stimulation (FES). The tremor occurring in the wrist flexion-extension and adduction-abduction was expected to be suppressed. A musculoskeletal model of wrist joint was developed to serve as the control plant, which covered four main muscles (extensor carpi radialis longus, extensor carpi ulnaris, flexor carpi radialis, and flexor carpi ulnaris). A second-order mechanical impedance model was used to describe the wrist skeletal dynamics. The core work was to design the controller and a hybrid control strategy was proposed, which combined inverse model based on feed forward control and linear quadratic regulator (LQR) optimal control. Performance of the system was tested under different input conditions (step signal, sinusoidal signal, and real data of a patient)., The results indicated that the proposed hybrid controller could attenuate over 94% of the tremor amplitude on multi-DoF wrist joint.
Electric Stimulation ; Humans ; Muscle, Skeletal ; physiopathology ; Tremor ; prevention & control ; therapy ; Wrist ; Wrist Joint ; physiopathology

Adult ; Aged ; Combined Modality Therapy ; Electric Stimulation Therapy ; Electroacupuncture ; Essential Tremor ; therapy ; Female ; Humans ; Male ; Middle Aged