Mobile Application Utilization for Measurement of Scapular Position
Mobile Application Utilization for Measurement of Scapular Position
The purpose of this study is to determine the ability of a mobile clinical application to
 reliably and accurately track scapular motion in people with asymptomatic and symptomatic
 shoulders. The ability to accurately and reliably measure shoulder position clinically is an
 important first step in choosing the best treatment techniques to treat shoulder movement
 dysfunction. Therefore, the primary objectives of the study are:

 1. To determine the inter- and intra-rater reliability of shoulder joint position
 measurements in symptomatic and asymptomatic subjects, by using a mobile application,
 with and without use of a handle for a smartphone

 2. To determine the validity of the shoulder joint position measurements measurements as
 described above.
Subjects will be asked to provide demographic and background information such as age, height,
 history of pain or injury, and descriptions of their physical activity levels. Subjects will
 receive a clinical screening exam by a licensed physical therapist to determine the type of
 movement abnormalities present, the severity of their symptoms and to screen for inclusion
 and exclusion criteria.

 To collect scapular position measurement reliability data, subjects will stand through out
 data collection. Measurements of the scapula will be taken with the mobile application for
 the arm at rest and in two elevated position. Subjects will wear an off-the-shelf elbow brace
 when asked to hold their arm in the two elevated positions. These elevated positions will be
 maintained by having subjects maintain contact of their forearm against a guide. For
 intra-rater reliability, position measurements will be repeated twice for each of three
 planes of elevation. Additionally, for inter-rater reliability each measurement will be
 repeated once by two other examiners. This process will repeated twice when using the
 application with and without the handle.

 For the validation portion of the study, a subgroup of subjects will have the same position
 measurements performed by a single examiner with additional motion sensors taped to the skin
 of their scapula and breast bone and a sensor attached to an arm brace strapped to their arm.

 In total, the subject will be asked to raise and hold their arm for approximately 5 sec, 36
 times during the testing within ranges of motion typically performed during daily activities.
Inclusion Criteria:

 1. Asymptomatic subjects: subjects without complaints or history of shoulder pain or
 obvious movement abnormalities.

 2. Symptomatic subjects: subjects with shoulder pain who have active range of motion
 beyond 120° of elevation.

 Exclusion Criteria:

 1. Symptomatic and asymptomatic subjects: history of trauma including fractures,
 dislocations, previous shoulder surgeries within the past 6 weeks. Humeral elevation
 less than 120 degrees, shoulder symptomology that is judged by the examiner to be of
 cervical origin.

 2. Asymptomatic subjects: Complaints of shoulder pain, positive results on joint tests
 commonly associated with shoulder impingement, presence of shoulder joint movement
 abnormalities as determined by a physical therapist, including thoracic scoliosis.