Neuromuscular Junction Architectures following Muscle Injury

The purpose of this study was to investigate the temporal changes taking place in the neuromuscular junction during muscle damage by histochemistry. Bupivacaine (BPVC; 200 μl， 0. 5% dilution) was injected in the rat hindlimb to induce extensor digitorum longus muscle damage. The morphology of the neuromuscular junction was monitored over 10 days (12 h and 1， 2， 3， 4， 6， and 10 days after injection) in longitudinal serial sections.Skeletal muscle fiber damage was detected early after BPVC injection. Opaque and necrotized fibers were first observed on day 2 and day 4， respectively. Regarding the neuromuscular junction， the nerve ending and the area of the motor end plate degenerated gradually， reaching a maximum on day 4 and day 6， respectively.The terminal arborization was reduced to a minimum on day 4. Finally， morphological regeneration started on day 6.These data suggest that BPVC causes a rapid degeneration of motor nerve endings and motor end plates in skeletal muscles， raising the possibility that exercise-induced skeletal muscle damage influences the somatic nervous syste

A Study on Morphological Characteristic, Dietary Conditions and a Satisfaction Degree for a Body in Female Students ； Focusing on Difference between Present Body Weight and Ideal Body Weight

With 333 female students whose age were 19-22yrs in Aichi， Tottori and Fukuoka prefectures， the purpose of this study was to examine their present height， weight， morphological characteristics， a satisfaction degree for their present body and dietary conditions， to obtain these data， and to compare with characteristics of these topics between difference of present weight and ideal weight (PI-dif.). For this purpose， subjects were divided into three groups by the result of mean and standard deviation (SD) of PI -dif. The three groups which were the great difference group (G; mean+1SD of PI-dif)， little difference group (L; mean-1SD)， and the middle degree group (M; mean±0.5SD) between G and L. Morphological characteristic and dietary conditions were measured by self-check list. A satisfaction degree for their present body， diet experience， daily exercise， smoking and drinking by original questionnaire. Results were as followings; 1. Average height， weight and BMI (Body Mass Index) of all subjects were 158.Ocm， 52.3kg and 20.9 respectively. The ideal values were 161.3cm of\u27 height， 47.2kg of weight and 18.2 of BMI. 2. The sufficient rates of nutrition intake per day were low percentages (59-89%) from standard intake (100%)， there were no differences of them among three groups. 3. Any differences were recognized in the leg， the ankle， the upper part of a body and the body weight between every group relating to a satisfaction degree for present body. 4. There were significant percentages in diet experience between G (53% ) and M (45-%) or L (22%) group， and G (31%) and M (27%) or L (20%) group in daily exercise. According to these results， it was suggested that there were some invisible problems relating to eating habits and self-consciousness of a body based on a degree of presentideal body weight difference in female students