(NewsUSA) – It’s called "tech neck." But to really understand the stress you’re putting on your neck every time you look down at some wireless device -; think texting, for example -; just imagine four 15-pound bowling balls sitting atop your head.Done imagining? Doctors of chiropractic, who regularly consult on issues including spinal alignment and proper posture, have some important advice for you. Watch the video at: http://youtu.be/JVigUgq-Wmc NewsUSA Human Interest