<原著>ヒト舌の加齢的変化 : 組織計測学的研究 : 第1報 舌動脈の狭窄度について

Tongues from 119 autopsies were fixed in 20% neutral formalin. The transversely cut segments from the middle parts of the tongues were embedded in paraffin. Histologic sections of 5μm thickness were prepared. Lingual tissue were examined histologically. Specimens were stained by hematoxylin-eosin, elastica van Gieson, and Azan-Mallory stainings. The stenotic index of human lingual arteries (area of lumen / area of intima and lumen of lingual artery × 100) (S.I) was calculated on the elastica van Gieson-stained slides by using an image analyzer system (Pias, LA555N). The results were as follows: 1. The lingual arteries, showed rupture and multilamellation of lamina elastica interna, as well as proliferation of intimal elastic fiber in almost all cases. 2. A decrease in the S.I was indicated in the lingual arteries with the progress of aging. 3. Calcification was observed at the intima and media of lingual arteries in a small number of cases (5 cases). These findings indicated that histological changes due to arteriosclerosis of lingual arteries was intimal thickening and lipid deposion; atherosclerotic changes was not observed

子守帯の快適性評価 : 官能評価と接触圧からの検討

In this study, to design comfortable baby carriers, we determined the burden on the wearer. Sensory evaluation and contact pressure were used to evaluate five types of baby carriers. The test subjects were three healthy adult women who carried a dummy approximate to a six-month-old baby. The subjects evaluated the fit of the baby carrier immediately after putting it on, and then after an activity. They also evaluated the sense of burden on different parts of the body when wearing the carrier. Contact pressure was measured with airpack sensors while the subjects were walking or resting. The results show that the type of baby carrier affected the contact pressure and the fit in the vertical holding position. A correlation, r, of 0.554 was obtained between the fit and the largest contact pressure immediately after the baby carrier was worn. Further, the correlation between the largest contact pressure during the entire activity period and the fit after the activity increased to r=0.669. While wearing the carrier, the fit at the focus area of contact pressure worsened after the activity. These findings show that, when designing baby carriers, stabilizing and distributing contact pressure points will effectively improve the fit. The findings also indicate the usefulness of the largest contact pressure as a means of objectively evaluating baby carriers

利き耳・非利き耳側への聴覚刺激が重心動揺に与える効果 足圧中心(COP)総軌跡長・矩形面積・外周面積に着目して

本研究は，利き耳・非利き耳側からの聴覚刺激が重心動揺に与える効果について検討した．被験者は健常若年者30名である．本研究は横断研究である．重心動揺の測定には重心動揺計を使用し，足圧中心（COP）総軌跡長・矩形面積・外周面積を抽出して比較検討した．研究条件は条件①：聴覚刺激無，条件②：利き耳側からの聴覚刺激，条件③：非利き耳側からの聴覚刺激である．結果，聴覚刺激無（条件①）と，利き耳側から聴覚刺激（条件②）では両群で有意な差を示さなかった．非利き耳側からの聴覚刺激（条件③）は，聴覚刺激無（条件①）と利き耳側から聴覚刺激（条件②）を比較したところ重心動揺が有意に減少していた．これにより，非利き耳側から入力された聴覚刺激は脳の側性化により対側半球の空間認知機能局在に情報が伝搬され，姿勢の調整に影響を与えていることが推察された．The purpose of this study was to examine the effect of auditory stimulation from dominant ear/nondominant ear on body sway. The subject were 30 healthy young people. This study was a Cross-Sectional study. The assessment of body sway was taken as the total length of Center of pressure（COP） displacements, Rectangular area, and Environmental area of COP using the stabilometer. Research Condition ①：Conditions that do not give auditory stimulation. Research Condition ②：Conditions of giving an auditory stimulus from the dominant ear side. Research Condition ③：Conditions for giving an auditory stimulus from the non-dominant ear side. As a result, Condition ① and Condition ② showed no significant difference in both groups. Condition ③ decreased significantly than Condition ① . Condition ③ also decreased significantly than condition ② . These results, auditory stimulation input from the non-dominant ear is sent to the cerebral hemisphere on the opposite side by laterality. From this, it is considered that the effect was given the body sway