The actual research is quite interesting. Sleep disorders themselves are fascinating. There is evidence that TBI (traumatic brain injury) can cause lasting sleep cycle disruption. Perhaps sleep disruption and TBI is a much bigger factor in the lasting impact of TBI than previously thought.
(https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3482689/).
Article review: This is pretty good science reporting, actually providing a link to the study being referenced. My one nit is the use of the word "Toxins". That is a trigger word for me that immediately makes me suspicious of the reporting. Scientific papers about the human body very rarely if ever use the word "Toxins" preferring precise terminology such as "brain waste products" or just keeping to the chemical names at hand. "Toxins" is one of those normative layman words that gets used to sweep up all sorts of ill-conceived explanations and pseudo-science.