Figure 2.

Morphology of the flexor digitorum superficialis muscle in the rat model of total brachial plexus injury with cC7 root transfer to the lower trunk or the median nerve (hematoxylin-eosin staining, 200× magnification)

Group A: cC7 root transfer to the lower trunk via the prespinal route; Group B: cC7 root transfer to the median nerve via subcutaneous tunnel; Group C: sham operation. Significant atrophy of the flexor digitorum superficialis muscle was seen on the injured side in groups A and B at 4, 8 and 12 weeks after the surgery. cC7: Contralateral C7.