Description of Some Oceanic Hydromedusae from Japan

Based on zooplankton collections made by Fisheries Three species of oceanic hydromedusae, Sminthea eurygaster, Crossota alba, and Cytaeis tetrastyla, are described and illustrated based on the specimens collected in the Pacific Ocean, off central Honshu, Japan. Sminthea eurygaster is the first record in Japan. One out of the three specimens of Cytaeis tetrastyla bears both the polypoid and the medusa buds. This is the second record of such an asexual reproduction of the species and the first record in the Pacific Ocean

Medial prefrontal cortex and anterior cingulate cortex in the generation of alpha activity induced by transcendental meditation: a magnetoencephalographic study.

Previous EEG studies have shown that transcendental meditation (TM) increases frontal and central alpha activity. The present study was aimed at identifying the source of this alpha activity using magnetoencephalography (MEG) and electroencephalography (EEG) simultaneously on eight TM practitioners before, during, and after TM. The magnetic field potentials corresponding to TM-induced alpha activities on EEG recordings were extracted, and we attempted to localize the dipole sources using the multiple signal classification (MUSIC) algorithm, equivalent current dipole source analysis, and the multiple spatio-temporal dipole model. Since the dipoles were mapped to both the medial prefrontal cortex (mPFC) and anterior cingulate cortex (ACC), it is suggested that the mPFC and ACC play an important role in brain activity induced by TM.</p

Problems of "death at home" during home care

In Japan, with the progress of aging society, home care will be promoted due to alteration of social security in near future. In these circumstances, increase of "deaths at home" is expected. Thus as "death at home" increase, it is suspected that physicians will have to investigate and diagnose in the case of "death at home" more frequently than the present time. In this review, on the basis of the laws and regulations, we describe the issue of death certificate or postmortem examination of "death at home", and the roles of "family doctors" for home care

Geomorphological features of landslides distributed in upper stream of Naka-river, Tokushima, Japan

In this study, Geomorphological features of landslide distributed in the upper stream of Naka-river, Tokushima, are studied with air-photograph interpretation and map reading. The number of landslide in investigation area is 0.29 number/km2 in Chichibu belt, 0.34 number/km2 in Kurosegawa belt, 0.17 number/km2 in Sambosan belt and 0.09 number/km2 in Shimanto belt. The most number of landslide is Kurosegawa belt and the least number of landslide is Shimanto belt. Landslides show tendency to become smaller in equivalent coefficient of friction as a large scale landslide. Direction of landslide in Kurosegawa belt has a lot of trend of NNE to NE and in Chichibu belt has a lot of trend of ENE to E. Some 63% is in under 50 meters of height from river bed to end of landslide body, but some 23% is in over 100 meters. Deepening of river beds proceeds in transverse valley at the Sakasyukito-river in Kurosegawa belt, while ingrown meander grows in the Naka-river that flows in Sambosan belt and Shimanto belt. Distribution of landslides in these areas is related to the effect of deepening and lateral erosion of river

日本におけるAtorella vanhoeffeni(刺胞動物門,鉢虫綱,カンムリクラゲ目)の広範囲な地理的分布

Medusae of a rare, small scyphomedusa, Atorella vanhoeffeni Bigelow, 1909 (Cnidaria, Scyphozoa, Coronatae), were collected and/or photographed at three sites in Japan: Notojima, Ishikawa Prefecture, in the Sea of Japan; Osezaki, Shizuoka Prefecture, on the Pacific coast; and Yonaguni Island, Okinawa Prefecture, in the East China Sea. In Japanese waters this species has been previously reported only from Kakeroma Island, Kagoshima Prefecture. The detailed morphology is described based on a medusa from Yonaguni Island