I've got a congenital deformity in my cervical spine, where there is a single block vertebra where C6 & C7 should be. An injury about 15 years ago began a process of collapsing the disks on either side of it. Because of the block vertebra, the nerve bundles that would exit between C6 & C7 go somewhere else, probably between the block and T1. It's a thicker nerve bundle than normal, which means a 2mm loss of disk clearance will cause nerve impingement in me where it might do nothing to someone else.
I've seen a chiro from time to time to help restore the clearances and it's helped, but there is now some arthritis that may be making it harder to recover from. It's still early to say, but my hand went numb in the middle of July and it's not a whole lot better now. In fact, I'm now getting some buzzing in my right thumb.
