Where should back upholstery height be placed?

Where should back upholstery height be placed?

• A. Just below the inferior angle of the scapula
• B. At the inferior angle of the scapula
• C. Mid-thoracic region
• D. At the shoulder blade level

Answer: (A)

Back upholstery height should be placed so the support is under the scapula, engaging the mid-to-lower thoracic region just below the inferior angle of the scapula. This provides stable trunk support to promote an upright posture while leaving the scapula free to move with arm motion and scapulothoracic rhythm. If the backrest is at or above the inferior angle, it can press into the scapula, restricting depression and rotation and limiting shoulder mobility. A mid-thoracic height or a level at the shoulder blade is too high and can hinder scapular movement and cause discomfort.

Back upholstery height should be placed so the support is under the scapula, engaging the mid-to-lower thoracic region just below the inferior angle of the scapula. This provides stable trunk support to promote an upright posture while leaving the scapula free to move with arm motion and scapulothoracic rhythm. If the backrest is at or above the inferior angle, it can press into the scapula, restricting depression and rotation and limiting shoulder mobility. A mid-thoracic height or a level at the shoulder blade is too high and can hinder scapular movement and cause discomfort.