What are risk factors for carotid and vertebral artery dissection?

• heritable connective tissue disorder ie Ehlers-Danlos, Marfan's, autosomal dominant polycystic kidney disease, osteogenesis imperfecta
• family history of arterial dissection
  
• history of minor precipitating trauma ie yoga, painting a ceiling, coughing, vomiting, sneezing, chiropractic manipulation of the neck

Source

Schievink, W. MD. "Spontaneous Dissection of the Carotid and Vertebral Arteries." NEJM. 22 March 2001.