A research paper in The article US National Library of Medicine published in August 2018 stated there are correlations of workplace bullying and brain injuries through brain image. It's 'the first study describing the link' as in the abstract.
The paper concluded that 'The reduction of the hippocampi volumes was related to work distress and, above all, to bullying at workplace. The results confirm that the morphological brain abnormalities could be involved in work-related psychiatric disturbances'.
This reading will help understanding the destruction of workplace bullying. Here is the web link to the open-access paper: