Hippocampal stimulation rebound effects in hamsters

Bar-pressing for solid food on a variable interval schedule was severely disrupted during and following electrical stimulation of the dorsolateral hippocampus in female hamsters, the disruption of bar-pressing for liquid food was substantially less. With experimenter delivered stimulation rebound eating of solid food and grooming were found to increase while time spent drinking liquid food did not. Other observations indicated that neither drinking water nor manipulating nest materials increased during or after hippocampal stimulation. Self-stimulation behavior was supported by dorsolateral hippocampal stimulation.