The obtained veterinary B-ultrasound image is a cross-sectional view perpendicular to the direction of the animal's muscle fibers. In order to avoid contact with the veterinary B-ultrasound probe during muscle contraction and extension, a bracket is used to keep the muscle belly perpendicular to the skin surface, but a certain gap is maintained with the muscle belly. The gap is filled and coupled with a gel-like coupling agent. The electromyographic electrode is attached between the veterinary B-ultrasound probe and the joint. The electrode is parallel to the muscle fiber direction and as close to the veterinary B-ultrasound probe as possible. The distance between the electrode pairs is about 20mn, and the reference electrode is attached to the ulnar head.

After each animal is prepared as required, it starts to work, first autonomously controlling the contraction of the muscle, gradually exerting force to the maximum, and then returning to a relaxed state. Repeat the above cycle of exercise more than 3 times, rest for 2 minutes, and observe the changes in the animal's muscles on the veterinary B-ultrasound during this process.

Veterinary B-ultrasound

In order to obtain the veterinary B-ultrasound images and force or torque, electromyographic signals of skeletal muscles during the entire muscle contraction process without interference and synchronously, so as to overcome the shortcomings of the above-mentioned research and measurement methods, a set of ultrasonic motion and elasticity measurement systems should be designed, and this system is used to measure the veterinary B-ultrasound images, electromyographic signals and torque parameters of muscles during long contraction, so as to obtain synchronous, non-interference, real-time data, so as to study the relationship between multiple parameters related to skeletal muscles during isometric contraction. At the same time, we proposed the concept of "sonomyogram" to define the spatial morphological change information about skeletal muscle structure obtained by ultrasonic scanning of skeletal muscles, and regarded the sonomyogram signal as a new muscle motion morphological parameter generated by the application of veterinary B-ultrasound imaging technology in skeletal muscle motion morphology.

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