By Marco Barbero, Roberto Merletti, Alberto Rainoldi
Invasive electromyography is a well-established diagnostic device that has been used for many years by way of neurologists. lately, new and replacement units have more and more turn into to be had that let analysis with no using needles. This constructing sector of technological know-how and the recent instruments haven't, although, been sufficiently investigated in educational education. accordingly a spot exists among what technology is making attainable and the competence bought in the course of graduate experiences. this useful quantity has the purpose of filling this hole via offering the knowledge required by way of clinical practitioners in rehabilitation, activities, and occupational healthiness in addition to through rehabilitation therapists, ergonomists, and recreation coaches. The strategies which are provided and defined can assist in tracking and recording alterations, comparing the effectiveness of remedies and coaching, comparing paintings stations, and combating and documenting the evolution of occupational issues of the neuromuscular system.
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Extra resources for Atlas of Muscle Innervation Zones: Understanding Surface Electromyography and Its Applications
Note that interpolation is an approximation and is not equivalent to a higher sampling frequency. M. Barbero, R. Merletti, A. Rainoldi, Atlas of Muscle Innervation Zones, © Springer-Verlag Italia 2012 39 40 4 EMG Imaging: Geometry and Anatomy of the Electrode-Muscle System Fig. 1 a Example of an analog signal sampled at time instants S1–S6. The sample values are indicated by dots. b The sample values are interconnected by straight segments. c The sampling frequency is artificially doubled by taking an “interpolated” sample in the middle of each segment.
IEEE Trans Biomed Eng 34:106-13 3 Generation, Propagation, and Extinction of Single-Fiber and Motor Unit Action Potentials Abstract This chapter addresses the issue of associating the location and nature of the electric field sources below the surface of a conductive medium with the corresponding potential distribution on that surface. ). The electric potentials generated by sources moving under these detection systems are described using a qualitative approach. The general concept of a spatial filter is introduced.
In computer memory, the signal represented by the dashed line does not exist; only the sampled values. , the “resolution” will be greater; however, a larger computer file will be needed to store the acquired information. A signal must be sampled above a minimal rate, which depends on how fast the signal is changing (see Chapter 5). The sampling frequency is the number of samples taken per second (Samples/s or S/s). If the sampling frequency is above this minimal rate (referred to as the “Nyquist rate”) the original signal can be reconstructed without error from its samples.