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	DTW Gait Analysis	EMG-envelope	Inverse Dynamics
Ämnesområde	Biomekanik	Biomekanik	Biomekanik
Familj	Process / pipeline	Process / pipeline	Process / pipeline
Ursprungsår	1978	1999	1990
Upphovsperson	Sakoe and Chiba	Roberto Merletti	David Winter
Typ	Sequence alignment and pattern matching	Digital signal processing pipeline	Computational analysis pipeline
Ursprungskälla	Sakoe, H., & Chiba, S. (1978). Dynamic programming algorithm optimization for spoken word recognition. IEEE Transactions on Acoustics, Speech, and Signal Processing, 26(1), 43-49.	Phinyomark, A., Quaine, F., Charbonnier, S., & Serviere, C. (2012). Robust EMG feature extraction in the whitespace. IEEE Transactions on Biomedical Engineering, 59(5), 1505-1517.	Winter, D. A. (1990). Biomechanics and Motor Control of Human Movement. Wiley-Interscience.
Alias	DTW, Gait pattern matching, Temporal gait comparison	EMG linear envelope, RMS envelope, Activation envelope	Inverse problem, Biomechanical inverse dynamics
Närliggande	3	3	3
Sammanfattning	Dynamic Time Warping (DTW) is a sequence alignment algorithm that measures similarity between time series of different lengths by allowing flexible temporal matching. Applied to gait analysis, DTW enables comparison of walking patterns across subjects and conditions despite variations in cadence or stride length.	Electromyography (EMG) envelope analysis extracts the amplitude modulation of muscle electrical activity to quantify muscle activation over time. By filtering and demodulating the raw EMG signal, practitioners obtain a smoothed activation profile that reflects when and how intensely a muscle is contracting during movement or fatigue.	Inverse dynamics is a biomechanical analysis technique that estimates the forces and moments acting on joints during movement by working backward from observed motion and ground reaction forces. Introduced by David Winter in the early 1990s, it is fundamental to understanding how muscles and joints generate and control human motion.