The document summarizes a study that examined the relationship between medical comorbidities and psychological function in patients with temporomandibular joint disorder (TMD). The study analyzed data from 1,060 TMD patients, finding a linear relationship between the number of medical comorbidities and overall psychological distress. It concludes that certain comorbidities like sleep problems, lack of exercise, and hypothalamic-pituitary-adrenal axis dysfunction may relate more strongly to psychological functioning in TMD patients. The study recommends multidisciplinary treatment approaches for TMD patients.