The patient, a 19-year-old female, presented with unexplained weakness of shoulder joint movement, neck soreness, pterygoid scapula during movement (Figure 1), compensatory depression of the neck when shrugging or lifting the shoulder (Figure 2), and limited abduction of the shoulder joint (Figure 3); electromyography showed paracentral nerve injury; 3 months after the modified Eden-Lange surgery, all the above symptoms and signs improved significantly, and the pterygoid scapula disappeared during shoulder joint movement (Figure 4), abduction mobility returned to normal (Figure 5), and compensatory depression of the neck disappeared when shrugging or lifting the shoulder (Figure 6).