J García Ramos

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In cats, rats and rabbits under light barbiturate anesthesia, glottal activity during spontaneous or evoked hiccups was studied. By measuring laryngeal pressure or resistance to flow to a constant current of air, and controlling several sources of error, it was found that glottal closure is an important component of this complex phenomenon. Adductor(More)
The results of the electrical stimulation of the locus coeruleus in curarized cats, and the effects upon the observed cortical responses of 5,6-dihydroxytryptamine or 6-hydroxydopamine injected intracisternally or applied in the subarachnoideal space were studied. The changes were followed on the strychnine spikes produced after the topical application of(More)
In records of tracheal pressure or flow taken from anesthetized cats appear large pressure-negative, or air inflow excursions, in response to single pulses applied to the central end of the vagus nerve. These responses have been attributed to phasic bronchodilation and not only due to the brief contractions of inspiratory muscles that occur as part of the(More)
The effects of the local application of glutamate, aspartate, glycine, GABA and dl-alanine were studied upon the intact and isolated cortices of barbiturate anesthetized cats and upon the intact cortex of similarly anesthetized terrapin turtles. Repetitive responses following the DCR's, and the strychnine spikes, were observed, and sometimes a long duration(More)
By using the mescaline or the strychnine spikes as indicators of electrocortical activity it was found that they are increased in size by some catecholamines topically applied. These spikes showed late and long-lasting changes after somatic, as well as after autonomic afferent stimulation. The latter induced by cyanide, light asphyxia, intravenous(More)
The cortical depression induced by the stimulation of some afferent fibers affects strychnine spikes elicited in two different ways: by direct electrical stimulation, and through the evoked potentials induced at the somatosensory area by single shocks to the radial nerve. The effects on these two types of responses were found to be very similar, which was(More)
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