Figure 5. In vitro carotid sinus nerve afferent discharge is unaffected by decreasing glucose.

Single-fibre chemoafferent discharge recorded from one animal during control (10mm glucose) and low glucose superfusion (2mm glucose; bar). Discharge was binned into 20-s periods and frequency calculated as impulses s⁻¹ (Hz). Discharge did not change significantly from control during the period of low glucose superfusion. On the right are shown five superimposed afferent action potentials from this recording. The vertical scale bar is 100 mV, horizontal scale bar 0.4 ms.