Effect of repeated immobilization on musculoskeletal system and parathyroid hormone in male albino rats

In this study, 40 adult male albino rats were used to investigate the effect of repeated immobilization stress on the musculoskeletal system and parathyroid hormone. The rats were divided into two equal groups [control and experimental]. The rats of the control group were kept in the housing cages, while those of the experimental group were put singly in cages 10 x 5 x 5 cm for six hours daily, then returned to the housing cages. This procedure was continued for 15 days. At the end of the experiment, blood was taken to estimate serum calcium, phosphorus, alkaline phosphatase and parathyroid hormone. Specimens from skeletal muscles, long bones and joints were taken for a histological examination