This research aims to investigate the effect of common environment factors on the amount of saliva secretion by analysis of the data collected from 10 healthy adult male subjects. More specifically, the experiment is designed to compare the effect of combinations of fragrance exposure and footbath under two illumination levels, high and low. The results have shown that there was a significant increase in the amount of saliva secretion after the subject was exposed to pineapple fragrance under the low-level illumination. There was no significant change in saliva secretion found after the footbath.
Visuo-motor related time (VMRT), which is calculated by subtracting the latency of motor-evoked potentials (MEP) from pre-motor time (PMT) as measured by electromyography for simple reaction tasks, reflects the time elapsed from visual stimulation to the motor cortex through the visual cortex. We aimed to determine whether observation training to a light signal shortens the VMRT. Fourteen healthy male subjects were divided into 2 groups: a training (TR) group that underwent training consisting of careful observation of a visual signal in a relaxed state, and a control (CONT) group that did not undergo any training. The TR group underwent the observation training for 4 weeks. Both groups performed the same response time test, which involved isometric abduction of the right index finger as quickly as possible in response to a visual signal, before (Pre-test) and after (Post-test) the training period. PMT, MEP latency, and VMRT were measured at each test. PMT, VMRT but not MEP latency were significantly shorter at Post-test than at Pre-test in the TR group. In addition, relative reduction in VMRT by training showed a positive correlation with Pre-VMRT. Coefficient of determination was 0.71.
This study investigated the effect of color variation on visual short-term memory. Task performances were compared in color matching and color variation memory. The delay in recognition was significantly shortened in the task of color variation memory. This effect has not been reported in other studies on the visual short-term memory of faces and figures. It is presumably mediated by the recognition of color variation in the ventral visual stream of the brain. The present study is the first to report that color variation has an advantage in visual short-term memory.
The purpose of study was to investigate the changes in an index of appetite before and after the browsing food pictures or the performing of radio gymnastics after the awakening. Seventeen healthy students (age: 20±1) were volunteered to this study. The investigation was conducted every other week for three days. There were three different groups (pictures browsing group, gymnastics group, control group) each day. All groups were the same subject. The appetite index and the hunger index were estimated at wake-up, immediately after the intervention, and 10 minutes after the intervention. In the gymnastics group and the pictures browsing group, both indices increased significantly compared to the control group. We suggested that that result contributed to the promotion of appetite for breakfast.