Gresham Chiropractor. Dr. Brent Dixson provides Auto Injury, Personal Injury, Whiplash, Disc Pain, Family Practice, School Sports Exam, Pediatric care, back pain relief, neck pain relief to the following locations: Portland, OR, Troutdale, OR, Sandy, OR, Vancouver, WA. Portland, OR Chiropractor providing Auto Injury, Personal Injury, Whiplash, Disc Pain, Family Practice, School Sports Exam, Pediatric care in Gresham, Oregon.