Hello Cuthbert. Mine is similar to yours.
1: I am aware that I am putting the steering lock on the car, and that it is locked.
2: I get out of the car, close the driver's door, and lock it.
3: I pull the handle to make sure that the door really is locked. It is secure.
4: I start to walk away.
5: Am I surethat I put the steering lock on?
6: I go back to check again. It is, but is the locking barrel pressed down? Yes it is.
7: Did I really check that the driver's door is locked? I pull the handle again, and it is locked.
8: What about the other three doors, and the tailgate? I check those as well, they're all locked.
9: I start to walk away, but stop again. Is the bonnet locked down properly?
10: Its front edges are level with the top edges of the wings, so yes it is.
11: Is the driver's door really locked?
12: I check again, and it is.
13: I start to walk away again, but is the driver's window fully closed?
14: I go and check that there's no gap between the top of the window and where it meets the rubber lining. There's no gap.
15: I start to walk away, but have one last look over my shoulder. Have I switched the lights off? Yes.
Now this is only me at my very worst, I'm not always this bad. And there's something else I've noticed about this; these symptoms are far less when I arrive at work, and am thinking more about this. And also about the fact that colleagues my be watching me if I do. So then I don't really go beyond making sure once that the door is locked. And I don't have any urge during the eight hour shift to go back to the car at break and check anything.
I think what is happening in these instances, Cuthbert, is that messages are not reaching the right part of the brain properly. This is a theory which was highlighted in a documentary on OCD, which I saw a few years ago.
The message fails to reach its 'destination' properly, so is caught between the action we perform, and the processing section of the brain. It then passes back and forth between the two like a table tennis ball. So maybe only after several failed attempts to be satisfied that something is safe/okay/secure, do we finally experience the satisfaction we should have had in the first place. This may be caused by faulty neurotransmitters in the brain.
But these sensations only affect us if the thought or action relates to a fear or paranoia we have. E.g, we may repeatedly check plug sockets because we're afraid there may be a fire if we don't. I keep checking the security of my car, because I like my car, need it, and am afraid of it being stolen.
I don't really know the neurology on how OCD plays on these fears of ours, and how, in my case, it doesn't work when I'm too preoccupied mentally with something else.
For example, Cuthbert, you probably wouldn't experience your checking symptoms if you received an emergency phone call from someone you know, and had to dash off from home, or if you'd just received some shattering news.
Perhaps in these situations, the brain produces a higher level of neurotransmitters? And when do other sufferers feel that their OCD symptoms are
worse? During stress, or when relaxed? With me, it tends to be more when I'm relaxed.
But I'm no neurologist, I don't really have the answer, but I do agree with that theory. I hope you've got something here to speculate with, Cuthbert.
Best wishes,
Steve