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OBJECTIVE Previous reports indicated that between-muscle substitution of active motor unit pools can be found in a variety of synergist muscles, including shoulder and leg muscles, but little information is available for the masticatory muscles. We hypothesized that, during a prolonged clenching effort performed at low- to moderate-bite force levels, a(More)
Eighty emergency US exams of the spleen for blunt abdominal trauma were performed in 1988-1989 to evaluate US accuracy and reliability. A real-time scanner with convex probes (3.5 and 5 MHz) was employed. The results were confirmed at surgery and/or clinics and instrumental examinations. Nineteen patients were positive at US (1 false-positive); US patterns(More)
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