The long-term objective of this mentored five-year development award is to achieve the independent investigative skills necessary to precisely identify biomechanical factors contributing to musculoskeletal dysfunction of the shoulder, specifically the subacromial impingement syndrome (SIS). The complexity of SIS dictates that a state-of-the-art, multi-faceted approach of exploration will be most effective in leading to an understanding of the pathomechanisms of this common problem. Training will target four scientific domains: anatomical quantification, soft tissue mechanics, movement science, and clinical research application. Each domain will be explored through coursework, mentored laboratory experiences, seminars and conferences, and scholarship. The research plan for this award will investigate the role of the posterior glenohumeral capsule in SIS. Decreased posterior capsule extensibility is believed to contribute to SIS by altering humeral head translations, diminishing the subacromial space, and repetitively compressing the rotator cuff or biceps tendons during arm elevation. The first specific aim of this project is to determine a clinically valid measure of posterior capsule extensibility using strain gauges and an electrogoniometer. The second specific aim is to determine the precise relationship of posterior capsule contracture to SIS. MRI and three-dimensional image reconstruction will be used to quantify the subacromial space before and after modeling posterior capsule extensibility alterations in cadavers. Contact pressures in the subacromial space, humeral head kinematics, and posterior capsule strain will also be measured after altering posterior capsule extensibility. The proposed development plan will result in an independent scientist with a unique set of skills with which to further explore the mechanisms of subacromial impingement and other pathologies of the shoulder joint complex. The research plan will determine the role of posterior capsule extensibility on movement dysfunction and SIS. Findings will be incorporated into the clinical diagnosis of movement dysfunction at the shoulder. Rehabilitation strategies targeting the posterior capsule will then be developed and tested for effectiveness. The findings of this research are likely to improve shoulder rehabilitation, decrease patient impairment and disability, prevent impingement, and lower health care costs.

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
Research Scientist Development Award - Research & Training (K01)
Project #
5K01HD052797-03
Application #
7589819
Study Section
Pediatrics Subcommittee (CHHD)
Program Officer
Shinowara, Nancy
Project Start
2007-03-01
Project End
2010-02-28
Budget Start
2009-03-01
Budget End
2010-02-28
Support Year
3
Fiscal Year
2009
Total Cost
$107,019
Indirect Cost
Name
Ohio State University
Department
Other Health Professions
Type
Schools of Medicine
DUNS #
832127323
City
Columbus
State
OH
Country
United States
Zip Code
43210
Dashottar, Amitabh; Borstad, John D (2013) Validity of measuring humeral torsion using palpation of bicipital tuberosities. Physiother Theory Pract 29:67-74
Dashottar, Amitabh; Borstad, John (2012) Posterior glenohumeral joint capsule contracture. Shoulder Elbow 4:
Borstad, John D; Dashottar, Amitabh (2011) Quantifying strain on posterior shoulder tissues during 5 simulated clinical tests: a cadaver study. J Orthop Sports Phys Ther 41:90-9