Fig. 4From: The effect of repetitive flexion and extension fatigue loading on the young porcine lumbar spine, a feasibility study of MRI and histological analysesHistological overview of a flexed FSU. Highlighted are the cranial-anterior growth zone (1) and the caudal-posterior growth zone (2). Sizebar in cm. Haematoxylin-eosin and Alcian blue solution stainBack to article page