An infant in prone with arms outstretched and a lateral trunk bend is BEST described as exhibiting which developmental position?

• A. Hooklying rotation
• B. Pivot prone
• C. Prone on elbows
• D. Modified plantigrade

Answer: (B)

Pivot prone is the best description here. In this position, the infant is on the belly with weight borne on one forearm, the trunk rotates and bends laterally as the body pivots around a point on the floor. The arms are often extended for balance, and the side-to-side trunk bend reflects this asymmetric weight shift and rotation. This posture contrasts with a more symmetrical prone position (prone on elbows) where the trunk stays relatively straight and both arms bear weight under the shoulders. Pivot prone captures the idea of the trunk rotating about a fixed point while the arms help balance, which matches the described description of arms outstretched with a lateral trunk bend.