Fig. 7.

Recording from an ILM during sneezing (asterisks) and aspiration reflexes (filled circles). A, This neuron depolarized powerfully during the aspiration reflex. Thick horizontal line at the bottom indicates stimulation of the nasopharyngeal mucosa. B, High-speed recording of the period indicated by a horizontal line below MP in A showing sneezing episodes. This ILM depolarized during the inspiratory phase of sneezing (SN1), hyperpolarized after the I–E transition (SN2), and then depolarized again abruptly during the latter part of the abdominal burst (SN3). Presumptive resting potential of this ILM was measured at thearrow.