According to Huffington Post, in a small study of 26 people with spinal cord injuries 77% of the people in the study had sleep apnea. Almost all the people in the study reported that they had problems sleeping in general.
The patients suffered from both central sleep apnea and obstructive sleep apnea. Obstructive is the most common and is caused when the throat muscles block the airway. Central sleep apnea is a problem between the brain and the muscles that control breathing.
The study was published in the Journal of Clinical Sleep Medicine by Dr. Abdulghani Sankari, a physician scientist at John D. Dingell VA Medical Center and Wayne State University School of Medicine.