Chronic muscle tension headaches - we've all experienced them before to one degree or another. The chiropractors at Back In Motion in Beaverton diagnose and treat them on a regular basis. Stress, computer work, cell phone usage, poor posture - these all contribute, typically in combination, to this modern epidemic. Symptoms include tightness and decreased range of motion in the upper cervical spine, point tenderness in the upper trap muscles and suboccipital muscles at the base of the skull, pain that radiates into the temples, and often pain that radiates to the eyeball. These symptoms typically worsen with stress and are most prominent at the end of the work day, especially if that day was spent in front of a computer with infrequent breaks. As common as this condition is, and as frequently as it is treated in the chiropractor's office, what does the research say about the efficacy of manipulation and manual therapy - both relied on heavily by the chiropractors at Back In Motion in Beaverton - in the treatment of muscle tension headaches?