Effect of electrical stimulation of the nucleus of the solitary tract on the development of electrical amygdaloid kindling in the cat.

Purpose: This work analyzed the effect of electrical stimulation of the nucleus of the solitary tract (NTS) on the development of electrical amygdaloid kindling (AK) in freely moving cats.

Methods: Nine male adult cats with implanted electrodes in both amygdalae (basolateral nucleus), both lateral geniculate bodies, left NTS, and both prefrontal cortices were used. Electromyogram and electrooculogram also were recorded.

Chronic stimulation of the cat vagus nerve: effect on sleep and behavior.

The effect of electrical vagus nerve stimulation (VNS) on sleep and behavior was analyzed in freely moving cats. Eight cats were prepared for 23-h sleep recordings. The left vagus nerve of four of them was stimulated during 1 min, five times at 1-h intervals, for 5 days.

Behavioral characterization of sleep in stumptail macaques (Macaca arctoides) in exterior captivity by means of high-sensitivity videorecording.

There are reasons to consider incomplete the description of sleep in many non-human primate species. Recording animals by highly sensitive videos to obtain detailed descriptions of nighttime behavior and evidence of muscle activity while in a resting posture, seems a promising approach to the non-invasive study of sleep in non-human primates. The present work describes the use of ultrasensitive videocameras to record and analyze spontaneous nighttime behaviors in captive non-human primates.

Habituation to bearable experimental pain elicited by tooth pulp electrical stimulation.

Stimulation (1/10 sec, 1-2 msec) of the tooth pulp of volunteers was carried out for 120 min at an intensity that produced bearable pain. Cortical evoked potentials, electroencephalographic activity, electromyograms of the superciliary and masseter muscles and galvanic skin response were recorded. Every 30 min, without suspending the stimulation, the subjects were questioned with respect to the sensations accompanying the stimuli.