The postural blood pressure reflex after a change of posture has been studied by Prof. K. Hukuda and his associates. It has been revealed by them that the pattern of the postural blood pressure reflex was modified by fatigue and constitution of individuals. The present authors studied the change of various measures on the postural blood pressure reflex in healthy Japanese males and females ranging in ages from six to fifty-four years. The time for restoration of the brachial blood pressure after the change of posture decreases with age up to forties, while it increases somewhat above fifty. The irregular undulation of the blood pressure in the time course of restoration is more marked in children and the aged than adults. There was found no difference between males and females in the reflex pattern. It is revealed from the results that adjustment of the blood pressure to the postural change developed with advancing age up to forties but began to fail over fifty.
1. Infants with nutritional disturbance due to rice flour feeding were studied from the viewpoint of etiology of beriberi. As the result it became clear that those infants showing the symptoms of infantile beriberi had taken (i) a great quantity of so-called secondary carbohydrates, (ii) an extremely small quantity of primary carbohydrates i. e. sugars, and (iii) some quantity of vitamin B1. 2. Coli communior and Coli communis were cultured on protein-free media added with polished rice paste, and bacteria-free filtrate of the culture was found virulent to mice, when the pH of the media was on the alkaline side. Paralysis and heart dilation were observed in the mice injected with such culture filtrate. The effect was proportional to the duration of the culture. Cocci did not produce such poisonous material. 3. Similar cultures obtained without addition of polished rice paste did not produce such poison. 4. This poison was detoxicated by the liver to a certain extent. There were evidences that suggest vitamin B1 is a powerful detoxicating agent for this poison. 5. A working hypothesis of the authors on the 'nature of beriberi is formulated as follows: Unbalanced habitual eating of polished rice starch lowers the acidity of the intestinal content which allows proliferation of Con, group. When excessive amount of starch is taken in such individuals, it cannot be hydrolysed away, and the stagnant starch may represent suitable media for Coli communior or Coli communis to prodce a certain poisonous subtance, which, absorbed across the intestinal wall, causes beriberi. Antiberiberic action of vitamin B1 consists in detoxication. Briefly, the authors regard the beriberi as a intoxication instead of a deficiency disease.
1. This is a report of mental work testing on a college girl, who had previously, 20 months before, been struck unconscious by thunder. At that time she, a rural high school student, was riding a bicycle on a country road. 2. Her result is on a high level on the whole; but marked fatiguabiliy is noticed in the course of the test, which was carried out on the principle of Kraepelin and in the procedure developed in Japan by Mr. Uchida. 3. This special feature was more manifest in the authors' clock-signaled session than in the conventional human-signaled session. The former means time-signaling with a specially adapted signal clock, while, in ordinary procedure of the Kraepelin-Uchida's mental work test, the time is signaled to the subjects under test by the supervisor of the testing. 4. Clock-signaling is recommended as more advantageous than conventional humansignaling, so far as the former contributes to eliminating the possible effect of situation influenced by the human relation. 5. Mental work curve or the scores of the speed of simple addition, recorded minute by minute and plotted as ordinates against time, shows inevitable fluctuation. The authors proposed a way of smoothing out the curve or rather of attenuating the fluctuation. A new concept of degree of fluctuation was also defined.
Time necessary for completion of a a set tennis match was found tly between 30 0 min. Energy requirement during this period was determined 200-600 Cal. Relative8 metabolic rate or the ratio: Extra energy requirement rate B.M.R. was 511, when the completed period of the match was taken as a whole. The level of energy metabolism was found higher in singles than in doubles, and in men than in women. This mainly depended on the degree of relative prevalence of action of running, which has a high R.M.R.
Grip strength, vital capacity, development of the mamma and growth of axillary hair were studied. The subjects were the same as in the previous report. In the average, grip strength is greater in group A than in group B (cf. the previous report as for the classification) in all age levels investigated. It is so in absolute values as well as in relative values of the grip strength related to the stature or to the weight. Group A reaches the maximum value of grip strength in absolute as well as relative sense at the age of 17 and group B at 18 years, group A preceding group B by a year in the development. Vital capacity behaves in the same way both absolutely and relatively as mentioned above for the grip strength. A half of group A acquires the final form of the mamma at the age 14 years 4 months while it is at 15 years 6 months for group B. A half of group A reaches the final state of axillary hair at the age of 15 years 6 months and it is at 16 years 5 months for group B. Summing up, group A precedes group B by a year or so in growth and development of the secondary sex characters and physical strength.