“…However, nontraumatic and involuntary muscular contraction (IMC) conditions can lead to missed dislocations. 9,14,18,19,21,22,31,39,41,44,64,67,83,85,95,96,100,105,106,115 Acute injuries represented 85% of BSASD reported in the literature. Twelve of the 20 chronic BSASD reported in the literature occurred in IMC conditions.…”