Botulinum Toxin Injection-Site Selection for a Smooth Shoulder Line: An Anatomical Study

Figure 2

Intramuscular nerve distribution pattern for all specimens based on macroscopic inspection. The -coordinate was the reference line, indicating the most lateral point of external occipital protuberance to the most lateral point of acromion. The -coordinate is perpendicular to the -coordinate according to the measure point (unit: %).