![](https://i1.wp.com/radrounds.com/wp-content/uploads/2020/07/LightbulbSign.png?resize=696%2C528&ssl=1)
Posterior dislocation of R.shoulder :
The humeral head is force placed into internal rotation and giving appearance of the light-bulb.
Posterior dislocation of R.shoulder :
The humeral head is force placed into internal rotation and giving appearance of the light-bulb.