Yes-the tube for the scan can be a bit claustrophobic-but it's only for a few minutes. However--if it makes you crazy-then yes-sedate for the examination.........Of your neck problems--well--one option would be to let this new episode subside-then physio to strengthen everything around the joint and still preserve the joint. Secondly-changing bicycles--probably to something more upright might help short term...........Here's hoping it goes away on its own! (And that DOES happen!)