Which movement pattern is described as affecting shoulder mechanics during upper-extremity tasks due to the thoracic region?

• A. Ankle dorsiflexion restriction
• B. Knee valgus
• C. Thoracic rigidity affecting shoulder mechanics during upper extremity patterns
• D. Poor scapular stability noted in cervical and upper extremity assessments

Answer: (C)

The key idea is how the thoracic spine sets the stage for shoulder movement. When the thoracic region is rigid, especially in extension and rotation, it limits the scapulothoracic rhythm that allows the shoulder blade to move properly as the arm rises or reaches. That restriction means the shoulder joint can’t glide through its full range efficiently, so movement patterns shift to compensate. You end up with altered shoulder mechanics during overhead or upper-extremity tasks, because the shoulder relies on the thoracic spine to provide the necessary extension and rotational motion for optimal function. While issues like poor scapular stability or other joints can affect shoulder function, the specific mechanism described here centers on thoracic rigidity interfering with how the shoulder moves during upper-extremity patterns.