to measure strength of the deep anterior neck muscles with a new measurement protocol and by using the NOD device, a dynamometer, in subjects with and without bruxism, and compared to EMG on the superficial muscles of the anterior neck and the masseter muscle.
Study Type
OBSERVATIONAL
Enrollment
10
testing the anterior neck muscles during a nodding movement and by using a dynamometer
Zurich University of applied sciences
Winterthur, Switzerland
activation score = AS
stepwise (5 steps) and correct (no substitution by the superficial muscles) activation of the deep neck flexors, that can be hold for 10 seconds: Each step increases by 3.4N. The scale will be offset, starting at 0N. Steps are accordingly: 3.4N, 6.8N, 10.2N, 13.6N, 17N. Higher scores denote better function
Time frame: baseline
performance index= PI
number of correctly performed 10 second holds at each incremental step. number between 1 and 10. Higher scores denote better function.
Time frame: baseline
Neck-Pain
neck pain, headache or discomfort during or immediate after the test protocol, measured by a numeric rating scale from 0 to 10. Higher scores denote more pain or discomfort
Time frame: baseline
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