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The authors were privileged with an opportunity to investigate food preference with school meals and the number of children missing breakfast; this is to report the result of the investigation in relation to osteoporosis. The subjects are all 266 students of a elementary school (male 134, female 132) where the author serves as school dentist. Frequent leftovers, missing of breakfast, and lunch menu on the weekend were investigated. The result showed that the students tend toward one-dish meals such as seaweed rice, hashed beef (or beef stroganoff) with rice, Japanese curry, etc. Frequent leftovers include chewy foods such as dried fish seasoned with mirin and small dried sardines. 3.8 of children go to school without having breakfast while 4.9 of children miss lunch on the weekend. Ultimately, prevention of lifestyle diseases including osteoporosis starts with turning to dietary habits of young children; school meals need to be improved in order to improve diet of school children. 266 134 132 2015 222 対象と方法 266 134 132

Vibration is detected by mechanoreceptors, including Pacinian corpuscles (PCs), which are widely distributed in the human body including the adventitia of large blood vessels. Although the distribution of PCs around large limb vessels has been previously reported, there remains no consensus on their distribution in the adventitia of the human deep blood vessels in the upper arm. In addition, the physiological functions of PCs located around the deep limb blood vessels remain largely unknown. This study aimed to elucidate detailed anatomical features and physiological function of lamellar sensory corpuscles structurally identified as PCs using the immunohistochemical methods around the deep vessels in the upper arm. We identified PCs in the connective tissue adjacent to the deep vessels in the upper arm using histological analysis and confirmed that PCs are located in the vascular sheath of the artery and its accompanying vein as well as in the connective tissue surrounding the vascular sheath and nerves. PCs were densely distributed on the distal side of deep vessels near the elbow. We also examined the relationship between vascular sound and pulsating sensation to evaluate the PCs functions around deep arteries and veins and found that the vascular sound made by pressing the brachial arteries in the upper arm was associated with the pulsating sensation of the examinee. Our results suggest that PCs, around deep vessels, function as bathyesthesia sensors by detecting vibration from blood vessels.

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