- 著者
- Yasuhiko Kondo Yasuo Sakuma
- 出版者
- THE PHYSIOLOGICAL SOCIETY OF JAPAN
- 雑誌
- The Japanese Journal of Physiology (ISSN:0021521X)
- 巻号頁・発行日
- pp.0601160021, (Released:2006-01-17)
- 被引用文献数
- 19 29
Partner preference and paced mating tests were accomplished in ovariectomized female rats following bilateral radiofrequency lesions in the medial amygdala. Open field behavior and passive avoidance learning were also examined to investigate the underlying behavioral mechanism. Partner preference was determined in a chamber located between castrated and sexually active males. Airborne olfactory cues were presented to the female through small holes on the partition. The lesion diminished preference for the odor of sexually active males over that of castrated males, even after injection with high-dose of estrogen. On the other hand, in a paced mating test, the lesioned females without estrogen treatment showed a significantly shorter latency for entering the male's compartment in a two-compartment apparatus, which allowed the females, but not the males, to cross the barrier through a narrow opening at the bottom. However, administration of estrogen and progesterone reduced the effect. The lesion had no effect on emotionality or exploratory behavior in an open field test, but impaired passive avoidance learning capability. We suggest that a male poses an inherent threat to a female. The seemingly incompatible results of partner preference and paced mating tests can be compromised if the male is inherently aversive to the female; this emotional response can be removed by the medial amygdala lesion.
- 著者
- 能勢 博 森本 武利 小椋 香苗
- 出版者
- THE PHYSIOLOGICAL SOCIETY OF JAPAN
- 雑誌
- The Japanese Journal of Physiology (ISSN:0021521X)
- 巻号頁・発行日
- vol.33, no.6, pp.1019-1029, 1983 (Released:2006-07-28)
- 参考文献数
- 21
- 被引用文献数
- 31 49
Dehydration amounting to about 10% of body weight was induced in adult male rats by exposure to a hot, dry environment (D.B.T., 36°C; R.H., 20%) over 6 to 8hr. The volumes of total water (TW), extracellular fluid (ECF), and plasma (PV) were determined both on individual tissues and on the whole body using the constant dry weight as well as 51Cr-EDTA and 125I-RIHSA dilution methods. Total body water (TBW), intracellular (ICF), and interstitial (ISF) fluid volumes were calculated from these data.The 10% loss of body weight caused a decrease in TBW by 17% from the control value; 41% of this loss was from ICF, 47% from ISF, and 12% from PV. The decrease of ISF was proportional to that of PV and the water loss from ICF was caused by an increase in plasma osmolality. As to the water loss from organs, 40% of the whole body water loss came from muscle, 30% from skin, 14% from bone, and 14% from viscera. The G.I. tract had the highest tendency to lose water while the brain and liver showed the least.These findings suggest that under heat-induced dehydration, both the extra- and intracellular fluid compartments of muscle and skin play an important role in the compensation of water loss and in the maintenance of circulation to the brain and liver.
- 著者
- SHUNZO TAKAGI MASAYUKI TAGAWA
- 出版者
- THE PHYSIOLOGICAL SOCIETY OF JAPAN
- 雑誌
- The Japanese Journal of Physiology (ISSN:0021521X)
- 巻号頁・発行日
- vol.5, pp.122-130, 1955 (Released:2011-06-07)
- 参考文献数
- 8
- 被引用文献数
- 3 4
The direction of winding and the regularities in form and arrangement of the intraepidermal portion of the eccrine sweat ducts were studied in horizontal skin slices.Right-handed spirals definitely prevailed over left-handed and deformed. spirals in the sweat ducts in the skin on the pad of fingers and toes of 28 Japa-nese and 3 whites regardless of sex and side of the body. The predominance of right-handed spirals was shown to hold in the other regions of the palmar and plantar skin and, though to a lesser extent, in the general body skin.The sweat ducts in the skin on the volar surface of the hand and foot were in the form of fairly regular cylindrical spirals. In a small area of the skin, their girth and pitch were fairly constant and their axes were nearly parallel to each other and, therefore, inclined toward the skin surface with an approximately uniform angle. The sweat ducts in the eponychium were shaped like straightened spirals, wound oftener right-handedly.