Table 1.

Summary of the number of K⁺ spikes and corresponding quantifiable glucose dips. Observation of a K⁺ spike confirmed SD in the vicinity of the probe. In every case, except for 5d aCSF, the majority of the K⁺ spikes were accompanied by a quantifiable glucose dip. Only the quantifiable glucose dips are included in Figures 4–7. The noise in a 10-min glucose baseline prior to each needle prick was used to create a threshold quantifiable glucose value (see text and Figure S4 for details).

	Total [K+] transients	Quantifiable changes in [glucose]
2hr DEX	24	24 (100%)
2hr aCSF	24	21 (88%)
5d DEX	15	12 (80%)
5d aCSF	15	4 (27%)
10d DEX	15	13 (87%)