Fig. 5 A-T.

(A-H) Trichrome staining (original magnification, x 200) and (I-P) Oil Red O staining (original magnification, x 100) of the supraspinatus and infraspinatus showed fibrosis and fatty infiltration in the supraspinatus and infraspinatus muscles from the denervation group and the nerve compression group, whereas fibrosis and fatty infiltration were decreased in the supraspinatus and infraspinatus muscles from the nerve compression and release group. (Q-T) The higher area fraction of collagen and fat was higher in the supraspinatus and infraspinatus in the denervation and the nerve compression groups. Area fraction of collagen (%) = area of collagen staining/entire sample area. Area fraction of fat (%) = area of Oil Red O staining/entire sample area. Solid lines indicate p < 0.05 and dashed lines indicate p < 0.01. Error bars indicate SD. DN = denervation; NC = nerve compression; NCR = nerve compression and release; SS = supraspinatus; IS = infraspinatus.