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https://www.readbyqxmd.com/read/23934080/system-identification-of-evoked-mechanomyogram-from-abductor-pollicis-brevis-muscle-in-isometric-contraction
#1
Takanori Uchiyama, Hiroaki Sakai
The purpose of this study is to verify the applicability of a sixth-order model to the mechanomyogram (MMG) system of the parallel-fibered muscle, which was identified from the MMG of the pennation muscle. The median nerve was stimulated, and an MMG and torque of the abductor pollicis brevis muscle were measured. The MMGs were detected with either a capacitor microphone or an acceleration sensor. The transfer functions between stimulation and the MMG and between stimulation and torque were identified by the singular value decomposition method...
December 2013: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/23129101/comparison-of-displacement-and-acceleration-transducers-for-the-characterization-of-mechanics-of-muscle-and-subcutaneous-tissues-by-system-identification-of-a-mechanomyogram
#2
Takanori Uchiyama, Keita Shinohara
The purpose of this study was to clarify the performance of transducers for the mechanical characterization of muscle and subcutaneous tissue with the aid of a system identification technique. The common peroneal nerve was stimulated, and a mechanomyogram (MMG) of the anterior tibialis muscle was detected with a laser displacement meter or an acceleration sensor. The transfer function between stimulation and the MMG was identified by the singular value decomposition method. The MMG detected with a laser displacement meter, DMMG, was approximated with a second-order model, but that detected with an acceleration sensor, AMMG, was approximated with a sixth-order model...
February 2013: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/22255982/system-identification-of-mechanomyograms-detected-with-an-acceleration-sensor-and-a-laser-displacement-meter
#3
Takanori Uchiyama, Keita Shinohara
The purpose of this study is to investigate the transfer functions of mechanomyograms (MMGs) detected with an acceleration sensor and a laser displacement meter. The MMGs evoked by electrical stimulation to the peroneal nerve were recorded on the skin of the tibial anterior muscle. The displacement MMG (DMMG) and the acceleration MMG (AMMG) systems were identified using a singular value decomposition method. The appropriate order of the AMMG system was six and that of the DMMG system was four. The undamped natural frequencies of the systems were compared to resonance frequencies of human soft tissue...
2011: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/2180093/the-usefulness-and-limitations-of-ultrasonography-for-the-diagnosis-of-adenomyomatosis-of-the-gallbladder
#4
K Cilingiroğlu, T Dağoğlu, K Demirkol, S Günay
Ultrasonography has been popular for the diagnosis of gallbladder diseases since the mid-1970s. Although this technique has replaced oral cholecystography (OCG) for the diagnosis of cholecystolithiasis, it has not gained popularity in the diagnosis of adenomyomatosis of the gallbladder (AMMG). We examined 141 patients with clinically suspected gallbladder disease. Ultrasonography (previously done by a radiologist) had produced no positive findings. On ultrasonographic re-evaluation by the same radiologist, but in the presence of a surgeon from our study group, 64 cases of AMMG were detected...
1990: Surgical Endoscopy
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