Dear musicman,
Been quite busy with work and haven't had the chance to read the Neurotalk site lately. I, like yourself, have to be very careful with those greeting "pecks of the cheeks" that female friends do automatically. A bit too much much of a "head bump" and I'm in to damage control for a few hours and sometimes days. The other one that kills me is the "guy hug" where we whack each others back. That simple vibration is as bad as a head bump.

Can't say I'm any closer to an explanation and the solution for now is simple: do what you need to do to avoid bumping your head! Mark in Idaho gives great advice to people struggling with the dramatic changes this syndrome has brought to their lives. But the best one remains "acceptance". Know that you're not alone is this struggle. Resign yourself to the fact that setbacks will happen and most of us will naturally get "down" when this occurs. Healing happens but is does so at "its" speed, not yours. Most of all, focus on the many things you can still do and not the ones you can't. Most of the time, having a positive outlook takes a lot of work. But it's so worth it. That's how I have managed my life. Hope it works for you.