During anti-gravity scapular abduction, how is stabilization achieved?

During anti-gravity scapular abduction, how is stabilization achieved?

• A. Weight of the trunk against the table
• B. Clinician stabilizes thorax to prevent rotation
• C. Weight of the trunk on the table and the clinician's hand on the opposite scapula
• D. No stabilization

Answer: (C)

Stabilizing the shoulder girdle during anti-gravity scapular abduction is about keeping the trunk from compensating so the movement reflects the scapulothoracic protraction handled by the serratus anterior. The weight of the trunk on the table provides passive stabilization of the thorax, while the clinician’s hand on the opposite scapula gives targeted stabilization to prevent rotation or movement of the thorax and scapula as a unit. This combination lets the scapula protract and upwardly rotate against gravity without the patient relying on trunk motion. If stabilization is missing or inadequate, trunk or contralateral scapular movement can masquerade as strength.

Stabilizing the shoulder girdle during anti-gravity scapular abduction is about keeping the trunk from compensating so the movement reflects the scapulothoracic protraction handled by the serratus anterior. The weight of the trunk on the table provides passive stabilization of the thorax, while the clinician’s hand on the opposite scapula gives targeted stabilization to prevent rotation or movement of the thorax and scapula as a unit. This combination lets the scapula protract and upwardly rotate against gravity without the patient relying on trunk motion. If stabilization is missing or inadequate, trunk or contralateral scapular movement can masquerade as strength.