The purpose of this study was to examine cerebral oxygenation in individuals with cervical spinal cord injury (SCI) during light exercise under normoxia and hypoxia. We used near-infrared spectroscopy to measure changes in oxyhemoglobin (oxyHb), deoxyhemoglobin (deoxyHb), and total hemoglobin (totalHb). In both the SCI and Control groups, deoxyHb increased during exercise under normoxia and hypoxia relative to rest. OxyHb slightly increased during exercise in the Control group. However, oxyHb decreased during exercise under hypoxia in the SCI group. These results might come from the decreased oxygen delivering capacity in individuals with SCI which was likely to result from the autonomic nervous system dysfunction and decreased skeletal muscle pump activity, possibly due to disuse atrophy.
We studied the effects of 3-month resistance training on bone metabolism in young adult women with a normal menstrual cycle. Thirteen women were assigned to the training group and twelve age-matched individuals served as a control group. After the training, cross-linked N telopeptide of type I collagen in the training group was significantly higher than that in the control group. Bone-specific alkaline phosphatase was not different between the two groups. These results suggested that resistance training influenced bone metabolism. Especially, resistance training can increase bone resorption and decrease bone formation.
This study examined the mental and physiological responses to degree of comfort in using sanitary napkins. Two types of sanitary napkins (thin type, thick type) were used by 17 women between menstrual periods. We evaluated the visual analog scale (VAS), heart rate (HR), ratio of low frequency and high frequency (LF/HF) of heart rate variability and salivary chromogranin A (CgA). The results of VAS (subjective evaluation) showed that the thin type napkin was more comfortable than the thick type napkin. The results of HR, LF/HF and salivary CgA (physiological evaluation) indicated that using the thin type napkin did not increase sympathetic activities compared with using the thick type napkin. Those results suggested that comfortable sanitary napkins have less stress mentally and physiologically.
We noted the human damage such as injury and illness after the Hyogo-ken Nambu Earthquake. In this study, from the view point of daily and non-daily affliction, we assessed the trend in earthquake-related diseases focusing on Osaka City emergency ambulance service activity records. Those records can be used to grasp details about emergencies in terms of a board range of factors, such as the attributes of the patient and situations of injuries. The data were found effective for ascertains two levels of earthquake-related diseases, especially in Yodogawa and Nishiyodogawa ward near Kobe City. Those areas showed a relatively high injury rate. It took more than 1 week after the Hyogo-ken Nambu earthquake occurred to return to the same condition before the earthquake.
The purpose of this study is to investigate the difference of the skin blood flow (SBF) reaction to white noise exposure during the follicular phase and the luteal phase. We simultaneously recorded ECG, electroencephalographic (EEG) changes and SBF from 13 premenopausal females with normal menstrual cycles. The beat-to-beat changes o the heart rate (HR), the mean EEG frequency (MF-EEG), the mean EEG amplitude (MA-EEG) and SBF were analyzed. White noise exposure significantly caused an increase in HR, MF-EEG and MA-EEG during the follicular and luteal phases. SBF was significantly decreased by the auditory stimuli during the follicular phase, but not the luteal phase. We suspect that difference of SBF reaction was explained by 1) the change of the tonic vasoconstriction 2) the change of peripheral response, and 3) the pathway or the time course changes of efferent autonomic nervous system.