Fig. 3
From: Bone Morphogenetic Proteins and myostatin pathways: key mediator of human sarcopenia
Ultrastructural analysis of muscle fiber and satellite cell niches. a Image shows muscle fibers of OA patient (2500×). b Well conserved sarcomere structure of a muscle fibers of OA patient (20,000). c Image displays satellite cells (arrows) strongly associated among them and fused to form a syncytium (5000×). d Image shows atrophic fibers in OP patient (1000×). e Misaligned sarcomere in muscle tissue of OP patient (20,000×). f Satellite cells with obvious mark of degeneration (square) (5000×)