Final answer:
Adhesive capsulitis, or frozen shoulder, is the most likely condition to contribute to a capsular pattern. It involves inflammation and scar tissue formation in the shoulder joint, resulting in restricted movement.
Step-by-step explanation:
A capsular pattern refers to a specific pattern of restriction in joint movement that is typically associated with certain conditions or injuries. The most likely condition to contribute to a capsular pattern is adhesive capsulitis, also known as 'frozen shoulder.' This condition involves inflammation and the formation of scar tissue in the shoulder joint, which reduces mobility and results in a specific pattern of limited movement, such as reduced external rotation, abduction, and internal rotation of the shoulder.