Theory 65/Shivering/Threshold lens
Shivering Stops on Fuel
The claim
Shivering ceases below a threshold in muscle glycogen, so an animal can be dangerously cold yet not shivering.
01Mechanism
Shivering consumes glycogen locally; when depleted, the muscle cannot sustain contraction regardless of the thermal drive.
02Prediction
Cessation should track glycogen.
03Refutation
Cessation tracking temperature would remove fuel.