HCRT and Hypoglycemia: If carbohydrate re-feeding can be considered a reward, the low probability (i.e., no carbohydrates on re-feeding, 0 probability) and decreased uncertainty (i.e., 100% certainty of not receiving the carbohydrates) of this reward may be associated with diminished OX activation on subsequent exposure to hypoglycemia (a reward-predicting cue in this case).