The present study investigated the applicability of normalized pulse volume (NPV) as a new index for psychophysiological detection of deception. Twenty eight healthy undergraduates (14 males, 14 females) were required to commit a mock crime. The subjects were each instructed to steal an envelope containing a piece of jewelry and to hide it. The subjects were then given the Guilty Knowledge Test concerning the hidden thing, during which NPV, peripheral skin blood flow, heart rate, skin conductance response, skin conductance level, systolic and diastolic blood pressure, and thoracic and abdominal respiration rates were recorded. The results indicated that NPV decreased much more in the critical than in the non-critical items during the first 15 seconds after the onset of the items. The decrement pattern of NPV was almost identical to that of peripheral blood flow. The present study strongly suggests that NPV is a sensitive and cost-effective index for an application in practical polygraph examinations. (Japanese Journal of Physiological Psychology and Psychophysiology, 21 (3) : 217-230, 2003.)
In the present study, effects of the entorhinal and hippocampal lesions on delayed non-matching-to-place (DNMTP) performance in radial maze were examined to investigate the differential involvement of the entorhinal cortex and hippocampus in place guided working memory. Rats with lesions of the entorhinal cortex displayed significant delay-dependent impairments on DNMTP performance, whereas the performance of the hippocampal lesioned rats was severely impaired for all the delays examined. The results indicate that the entorhinal cortex is primarily involved in place guided working memory, and the hippocampus has involvement with reference memory in addition to place guided working memory. Therefore, these findings suggest that there is a functional dissociation between the entorhinal cortex and hippocampus.