Sorry, but it is Carpal Tunnel Syndrome. Might just be acting up when your wrists are bent on the bike, with pressure for over a certain amount of time, in which case it is "probably" (means ask your doctor, not a bunch of nit wits on a sportbike web site) not enough to be worried more than about 24 Hours.
Sailor asks you about work. Carpal Tunnel is an overuse type problem with the hands in a position similar to what they are in on your bike. You get swelling of the sheath covering the tendons that pass through a cartilage tunnel in the wrist, which also is the conduit for the nerves to pass into the hands. So the swelling pushes against the nerves causing the numbness or "neuropathy" (i.e., could also be tingling or electrical shock type sensations).
I had the problem after riding for 8 days straight to get to Florida from Seattle on my ZX9. My left hand got numb and stayed that way, for about ten days, and I had reduced grip in that hand. It sucked but it went away after the trip. I have had no similar problems, but the next time I ride to Florida or Louisiana and Texas to see my relatives I will use a touring bike or a cruiser.
See your doctor. If the problem persists they may wish to test for reduction in nerve transmission to/from the hand or hands.
Do not neglect the problem, it only gets worse if you do not handle it right. Better to make ergonomic changes than to have to get surgery. Ask your doctor to refer you to a physical or occupational therapist for one or two sessions of counseling to solve the problem from an ergonomic perspective. Even if it is just while riding your bike.