title: [Strength and mineral composition of human vertebrae during prolonged bed rest].
abstract: Reduction of the strength of vertebrae not associated with osteoporosis has been revealed in patients who underwent strict bed rest for 20-40 days and died from sudden complications. The strength of vertebrae of humans who died in an accident was assumed as normal. A comprehensive analysis has shown that reduction of the strength was caused by alterations in the chemical composition of vertebral mineral substances, particularly by the diminution of the calcium content.
mesh_terms: D000328:Adult; D001510:Bed Rest / Q000009:adverse effects*; D001696:Biomechanical Phenomena; D002118:Calcium / Q000032:analysis; D004548:Elasticity; D006801:Humans; D008274:Magnesium / Q000032:analysis; D008875:Middle Aged; D010758:Phosphorus / Q000032:analysis; D011188:Potassium / Q000032:analysis; D012964:Sodium / Q000032:analysis; D013122:Spinal Diseases / Q000209:etiology*; D013131:Spine / Q000032:analysis*
chemical_list: D010758:Phosphorus; D012964:Sodium; D008274:Magnesium; D011188:Potassium; D002118:Calcium
vernacular_title: Prochnost' i mineral'nyi sostav pozvonkov cheloveka pri dlitel'nom postel'nom rezhime.