Anterior Coracoscapular Ligament as a Factor Predisposing to or Protective for Suprascapular Neuropathy

Figure 2

Schema presenting the predisposing (red arrows) or protective (green arrow) roles of the ACSL. In “deep and narrow” suprascapular notch (a), the nerve might be irritated by bony borders (red zigzag), but when the ACSL is present (b) the nerve might be protected by this ligament. When the nerve passes between the ACSL and the bottom of the suprascapular notch (c) it might be compressed (red zigzag). ACSL, anterior coracoscapular ligament; SN, suprascapular nerve; STSL, superior transverse scapular ligament.