Surface EMG and acceleration signals in Parkinson’s disease: feature extraction and cluster analysis

Rissanen, Saara M.; Kankaanpää, Markku; Meigal, Alexander; Tarvainen, Mika P.; Nuutinen, Juhani; Tarkka, Ina M.; Airaksinen, Olavi; Karjalainen, Pasi A.

doi:10.1007/s11517-008-0369-0

Cited by 78 publications

(76 citation statements)

References 19 publications

(35 reference statements)

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“…The power spectral densities of EMG and ACC and their cross-spectral density were estimated here by using Welch's averaged periodogram method. The coherence parameter is the area of the magnitude squared coherence spectrum in the frequency range [0-50] Hz (Rissanen et al, 2008). …”

Section: Emg Featuresmentioning

confidence: 99%

Signal features of surface electromyography in advanced Parkinson’s disease during different settings of deep brain stimulation

Rissanen

Ruonala

Pekkonen

et al. 2015

Clinical Neurophysiology

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h i g h l i g h t sEfficacy of deep brain stimulation (DBS) treatment was quantified here by using surface EMG and acceleration measurements. EMG signal features differed between different DBS settings for biceps brachii muscles. EMG features pointed to previously defined optimal settings in most of patients. a b s t r a c tObjective: Electromyography (EMG) and acceleration (ACC) measurements are potential methods for quantifying efficacy of deep brain stimulation (DBS) treatment in Parkinson's disease (PD). The treatment efficacy depends on the settings of DBS parameters (pulse amplitude, frequency and width). This study quantified, if EMG and ACC signal features differ between different DBS settings and if DBS effect is unequal between different muscles. Methods: EMGs were measured from biceps brachii (BB) and tibialis anterior (TA) muscles of 13 PD patients. ACCs were measured from wrists. Measurements were performed during seven different settings of DBS and analyzed using methods based on spectral analysis, signal morphology and nonlinear dynamics. Results:The results showed significant within-subject differences in the EMG signal kurtosis, correlation dimension, recurrence rate and EMG-ACC coherence between different DBS settings for BB but not for TA muscles. Correlations between EMG feature values and clinical rest tremor and rigidity scores were weak but significant. Conclusions: Surface EMG features differed between different DBS settings and DBS effect was unequal between upper and lower limb muscles. Significance: EMG changes pointed to previously defined optimal settings in most of patients, which should be quantified even more deeply in the upcoming studies.

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Section: Emg Featuresmentioning

confidence: 99%

Signal features of surface electromyography in advanced Parkinson’s disease during different settings of deep brain stimulation

Rissanen

Ruonala

Pekkonen

et al. 2015

Clinical Neurophysiology

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“…Accelerometers have been applied outside the operating room (OR) for a wide variety of purposes, e.g., to characterize pathological tremor [8,13], to compare it with physiological tremor [20,35,36], and to evaluate the severity and evolution of tremor [28,29,40] and the tremor-alleviating effect of drugs or DBS [22,36,47]. Pulliam et al [34] used motion sensors during postoperative DBS pulse generator programming to develop automated programming algorithms and concluded that objective assessment can improve patients' outcomes.…”

Section: Introductionmentioning

confidence: 99%

Intraoperative acceleration measurements to quantify improvement in tremor during deep brain stimulation surgery

Shah

Coste

Lemaire

et al. 2016

Med Biol Eng Comput

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Intraoperative acceleration measurements to quantify improvement in tremor during deep brain stimulation surgery. Medical and Biological Engineering and Computing, Springer Verlag, 2017, 55 (5) AbstractDeep brain stimulation (DBS) surgery is extensively used in the treatment of movement disorders. Nevertheless, methods to evaluate the clinical response during intraoperative stimulation tests to identify the optimal position for the implantation of the chronic DBS lead remain subjective. In this paper, we describe a new, versatile method for quantitative intraoperative evaluation of improvement in tremor with an acceleration sensor that is mounted on the patient's wrist during surgery. At each anatomical test position, the improvement in tremor compared to the initial tremor is estimated on the basis of extracted outcome measures. This method was tested on 15 tremor patients undergoing DBS surgery in two centers. Data from 359 stimulation tests were acquired. Our results suggest that accelerometric evaluation detects tremor changes more sensitively than subjective visual ratings. The effective stimulation current amplitudes identified from the quantitative data (1.1 ± 0.8 mA) are lower than those identified by visual evaluation (1.7 ± 0.8 mA) for similar improvement in tremor. Additionally, if these data had been used to choose the chronic implant position of the DBS lead, 15 of the 26 choices would have been different. These results show that our method of accelerometric evaluation can potentially improve DBS targeting.

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“…Moreover, because this electrode is very thin and can bend freely, it does not leave marks on the skin during prolonged ECG measurements. This property of the electrode allows the subject to feel comfortable throughout the measurement and also allows for make good contact with the subject's skin when used in bioimpedance measurement, facial movement detection, or EMG measurement [5,11,13,16].…”

Section: Discussionmentioning

confidence: 99%

Thin and flexible active electrodes with shield for capacitive electrocardiogram measurement

Lee

Sim

Kim

et al. 2010

Med Biol Eng Comput

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Capacitive electrocardiogram (ECG) measurement over clothing requires large electrodes that can remain in contact with curved body surfaces to increase the signal-to-noise ratio (SNR). In this article, we propose a new, thin, and flexible active electrode for use as a capacitive ECG measurement electrode. This electrode contains a shielding plate over its surface and it is extremely thin and can bend freely to cover larger body surfaces of the curve-shaped human torso. We evaluated the characteristics of flexible active electrodes under conditions of varying cloth thickness, electrode size, and contacting pressure. Electrodes of two sizes (45 and 12 cm(2)) were attached to a chest belt to measure the ECG from the human torso, and the results obtained for both the sizes were compared. Cloth thickness and electrode size showed a dominant effect on the SNR, whereas contacting pressure had almost no effect. The flexible active electrodes attached to chest belts wrapped closely and uniformly over the curved surface of the torso and SNR was increased with an increase in electrode size. Although the ECG signal became more distorted as the cloth thickness increased, the larger-sized flexible active electrode (45 cm(2)) showed less distortion than the smaller-sized one (12 cm(2)).

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Surface EMG and acceleration signals in Parkinson’s disease: feature extraction and cluster analysis

Cited by 78 publications

References 19 publications

Signal features of surface electromyography in advanced Parkinson’s disease during different settings of deep brain stimulation

Signal features of surface electromyography in advanced Parkinson’s disease during different settings of deep brain stimulation

Intraoperative acceleration measurements to quantify improvement in tremor during deep brain stimulation surgery

Thin and flexible active electrodes with shield for capacitive electrocardiogram measurement

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