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Rats shifted from a 12-pellet to a 1-pellet reward for running in a straight runway showed a decrease in start, run, and goal speed to levels below rats that received only the 1-pellet reward throughout training (a negative contrast effect). Contrast was greatest in the goal region of the runway. Rats with damage to the hippocampus produced by the(More)
The activation of amygdaloid nuclei, the ventral perirhinal cortex (vPRh), and several other brain areas in the rat during the acquisition and expression of olfactory fear conditioning was assessed through Fos immunocytochemistry in 3 separate experiments. The results of Experiment 1 suggest that olfactory and somatosensory inputs may functionally converge(More)
Previous studies have found that combined lesions of the perirhinal and entorhinal (PRER) cortical areas do not impair, and in fact may facilitate, acquisition of successive olfactory discriminations. The present study sought to determine the effect of PRER lesions on the acquisition of simultaneous olfactory discriminations. Rats (N = 24; 9 PRER-lesioned,(More)
In 55 patients, 25 endocrowns (test) and 40 shoulder crowns (control) were produced chairside in a private practice using the Cerec 3 (CAD/CAM) method and Vita Mark II feldspathic ceramic. The crowns were examined at baseline and after up to 12 years using modified USPHS criteria. The survival estimate was assessed by Kaplan-Meier analysis. The 12 years(More)
STUDY OBJECTIVE To develop a technique for performing laparoscopy in the mouse. DESIGN Controlled animal study (Canadian Task Force classification II-1). SETTING University research laboratory. SUBJECTS Twenty-eight CD-1 pregnant mice. INTERVENTION Eight mice underwent anesthesia only and 20 had anesthesia plus laparoscopy at 5.5 and at 10.5 days'(More)