Figure 7.

Effects of CIH on the intrinsic electrophysiological properties of post-inspiratory laryngeal motoneurones

In the presence of blockers of fast synaptic transmission (see Methods) in the perfusion, we tested the intrinsic electrophysiological properties of post-inspiratory laryngeal motoneurones from control and CIH rats. Either intrinsic excitability (Aa and Ab) or input resistance (Ba and Bb) of post-inspiratory laryngeal motoneurones were not affected by CIH. Note the presence of burst discharge (↑) at the beginning of the positive current injection or at the end of hyperpolarizing pulses in the post-inspiratory laryngeal motoneurones. *Upon larger hyperpolarizing pulses in (Ba) and (Bb) the membrane potential presented a shift toward more positive values as a time-dependent conductance was slowly turned on. CIH, chronic intermittent hypoxia.