All issues
Volume 16 (1967)
- Issue 4 Pages 1-
- Issue 3 Pages 57-
- Issue 2 Pages 31-
- Issue 1 Pages 1-
Volume 16, Issue 2
Displaying 1-3 of 3 articles from this issue
- |<
- <
- 1
- >
- >|
-
Y. Kawakami, N. Kurosawa, H. Kikuchi1967 Volume 16 Issue 2 Pages 31-37
Published: June 01, 1967
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSThe simultaneous recording of ECG and the pulse wave at the big toe was obtained. The time of transmission of the pulse wave was expressed as the RP-index which was obtained by dividing the interval between the R waves in ECG and the pulse wave by the distance between the tip of the xyphoid process and the medial malleolus. Using the RP-index as the indicator of changes of blood vessels, its relations with the age, sex, the place of residence, the blood pressure, change of retinal vessels, ECG changes, vascular fragility and serum cholesterol level were studied. Its changes after exercise were also studied.
1) No significant correlation was noted between the age and the RP-index.
2) No significant difference in the RP-index was noted between the male and the female and between the resident of the urban area and those of the rural area.
3) A significant negative correlation was noted between the RP-index and the blood pressure, especially the diastolic pressure.
4) The RP-index tended to be smaller in individuals with arteriosclerotic changes of retinal vessels than in those without them (p<0.01-0.05) .
5) The RP-index tended to be smaller in individuals with signs of hypertrophy or myocarial damage in ECG than in those without them.
6) The RP-index tended to decrease as vascular fragility increased (p<0.01-0.05) .
7) No correlation was found between the RP-index and the serum total cholesterol level.
8) The RP-index was noted to increase with exercise loading.View full abstractDownload PDF (781K) -
K. Kikuchi1967 Volume 16 Issue 2 Pages 38-44
Published: June 01, 1967
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSThe purpose of this study is to inquire histologically when red muscle fibers and white muscle fibers are differenciated and how they develope, considering from sex difference.
Wistar-strain rats of the same venter were used in this experiment. The animals of both sexes were killed at the interval of five days, from birth to 25 days. Two groups of male and female rats of 70 days old after birth were used as control groups.
M. tibialis ant. was removed and then fixed in 10% formalin for approximately two weeks. As staining, alchohol solution of Sudan black B was used.
The results are as follows :
1) Sex difference in rats' body weight was started to appear about 15 days after birth.
2) Differentiation of red muscle fibers and white muscle fibers in M. tibialis ant. was recognized about 15 days after birth in male and female rats.
3) The entire area of cross section of M. tibialis ant. is increasing during the development of rats' body as a whole. No apparent tendency on sex difference was found till 25 days after birth. On 70 days after birth the entire area of cross section in male has about 1.5 times the size of female.
4) No increase of number in M. tibialis ant. was recognized during the development of rats' body as a whole and no sex difference in number of muscle fibers.
5) The area of cross section per fiber and the average diameter of fibers are increasing during the growth of rats' body. No sex difference of those in red and white muscle fibers was found till 25 days after birth but, on 70 days after birth, it became clear. The rate of hypertrophy of white muscle fibers is greater than that of red muscle fibers.
6) Ratio of the entire area of muscle fibers to the intercelluler space in M. tibi-alis ant. is increasing during the development of rats' body.
7) No difference of area of cross section per fiber in peripheral and innermost regions was found till about 15 days after birth. On 70 days after birth the red muscle fibers in peripheral have 1.4 times the size of those in innermost, and the white muscle fibers 1.3 times.View full abstractDownload PDF (9481K) -
M. Ono, Y. Takahashi, K. Kimura, K. Harada, K. Ikuta, Y. Miyamoto, K. ...1967 Volume 16 Issue 2 Pages 45-56
Published: June 01, 1967
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSWe followed the records of the standing broad jump and the vertical jump continuously for 2 months (except Sunday) to the students (2 females and 3 males) who had studied physical education in the university, and found that the record of the standing broad jump enhanced but that of the vertical jump did not changed. Then they paused for 3 months and were checked again. But the records of the both jumps did not change. The electromyographes of M. rectus femoris, M. glutaeus maximus, M. biceps femoris and M. gastrocnemius were recorded at the same time and the decreasing tendency of the muscular contraction time in the both jumps was observed. Even in the same subject the activity order of the four muscles mentioned above varied considerably, and it was impossible to find that a definite pattern could be gotten by repeat of our measurement.
In the standing broad jump the record could not be changed by the adjustment of muscular coordination but generally by that of muscular strength. In the vertical jump activity order of the main muscular groups varied excessively when the jumping height was changed.View full abstractDownload PDF (1309K)
- |<
- <
- 1
- >
- >|