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Figure 4. The power of the MON to conduct CAPs is set by the stability between tissue and energy demand and provide of substrate to the nerve. In MONs supplied with 10 mM glucose the imposition of a hundred Hz stimulus causes the CAP area to fall. However changing 10 mM glucose with 30 mM glucose within the aCSF restores the CAP to its full area. The horizontal bars indicate the glucose concentration current within the aCSF. The role that lactate plays in the above results was investigated. Clausen, 1992). The use of the compound cinnemate, which blocks lactate uptake into axons, was strategically used to dissect the element of lactate use. CIN, as well as D-lactate, should be used appropriately since they not only block membrane surface transporters but also block pyruvate uptake into mitochondria. In the presence of 2 mM glucose addition of a hundred and fifty μM CIN brought about a rapid CAP lower, indicative of glycogen-derived lactate performing as a supplemental substrate in the presence of two mM glucose (Brown et al., 2003). However in the presence of 10 mM glucose CIN had no effect (Brown et al., 2003). This control experiment has far reaching penalties, as it suggests that not all glucose is shuttled by way of astrocytes, however that axons can immediately take up glucose.
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