Relationships Between Ultrasound Data and the Impact of Lateral Epicondylar Pain

Inclusion Criteria for Tennis Elbow patients: * The patient must have given his/her informed and signed consent * The patient must be insured or beneficiary of a health insurance plan * The patient is available for 90 days of follow up * Pain when pressure applied to the epicondyl * Pain upon forced movement of both epicondylien muscles * Absence of pain upon forced movement of an epitrochlear muscle * Absence of one or more skeletal-muscle problem on the homolateral arm felt by the patient to be just as problematic as his/her tennis elbow * at least one consult for pain treatment associated with tennis elbow (on the same elbow) Inclusion Criteria for healthy volunteers: * The patient must have given his/her informed and signed consent * The patient must be insured or beneficiary of a health insurance plan * No pain when pressure applied to the epicondyl * No pain upon forced movement of both epicondylien muscles * No neck pain * No skeletal-muscle problems in the arms during the 3 months preceding the study Exclusion Criteria for Tennis Elbow patients: * The patient is included in another study * The patient is in an exclusion period determined by a previous study * The patient is under judicial protection, under tutorship or curatorship * The patient refuses to sign the consent * It is impossible to correctly inform the patient * The patient is pregnant * The patient is breastfeeding * Absence of one or more skeletal-muscle problem on the homolateral arm felt by the patient to be just as problematic as his/her tennis elbow Exclusion Criteria for Health Volunteers: * The subject is included in another study * The subject is in an exclusion period determined by a previous study * The subject is under judicial protection, under tutorship or curatorship * The subject refuses to sign the consent * It is impossible to correctly inform the subject * Presence of one or more skeletal-muscle problems in the arms within the 3 months preceding the study * Pain when pressure applied to the epicondyl * Pain upon forced movement of both epicondylien muscles * Consultation for any kind of treatment for elbow pain