Diagnoses and follow up of muscles diseases lack imaging. Severity assessment of masticatory dysfunction and follow up of treatment effectiveness is currently based only on clinical features. Supersonic ShearWave Imaging® is a new, non-invasive, non-irradiating and dynamic imaging technique that uses ultrasound and allows shear wave elastic modulus in a muscle in order to study its viscoelastic properties. In this study, the investigators study the correlation between changes of shear wave elastography modulus and surface electromyogram features of the masseters between rest and maximal voluntary contraction.
Study Type
INTERVENTIONAL
Allocation
NA
Masking
NONE
Enrollment
20
Each of the two observers performs twice ultrasound examination and measures of the masseter thickness and its elastic modulus, at rest and maximal voluntary contraction.
Experimented neurologist performs EMG examination.
CHU de Saint-Etienne
Saint-Etienne, France
Elastic modulus using Supersonic Shear Imaging® technique on superficial and deep masseter parts at rest and maximal voluntary contraction.
Time frame: Day 1 (inclusion day)
Thickness of the whole masseter mesured by Supersonic Shear Imaging® technique
Time frame: Day 1 (inclusion day)
Thickness of the masseter superficial part mesured by Supersonic Shear Imaging® technique
Time frame: Day 1 (inclusion day)
Thickness of the masseter deep part mesured by Supersonic Shear Imaging® technique
Time frame: Day 1 (inclusion day)
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