Parameters and sites of brainstem stimulation capable of eliciting the rabbit nictitating membrane response

One hundred and thirty-five different combinations of pulse amplitude, pulse width, pulse train duration, and pulse frequency were delivered to either pars oralis of the spinal trigeminal nucleus, the accessory abducens nucleus, the abducens nucleus, or the reticular formation at the level of the spinal trigeminal nucleus. The percentage of occurrence, amplitude, and latency of the rabbit nictitating membrane response were shown to be lawfully related to the parameters of stimulation. Moreover, the electrode sites were ordered from reticular formation to abducens to accessory abducens to pars oralis in terms of the increasing efficacy with which stimulation elicited the nictitating membrane response.