title: Increases of calcium and magnesium and decrease of iron in human posterior longitudinal ligaments of the cervical spine with aging.
abstract: To elucidate compositional changes of ligaments with aging, the authors investigated age-related changes of elements in the posterior longitudinal ligaments (PLLs) by inductively coupled plasma-atomic emission spectrometry. After the ordinary dissection, PLLs were resected from the subjects ranging in age from 65 to 95 yr. The PLLs of the cervical spine were resected between the fourth and fifth cervical vertebrae, the PLLs of the thoracic spine between the fifth and seventh thoracic vertebrae, and the PLLs of the lumbar spine between the second and third lumbar vertebrae. Calcium and magnesium increased progressively with aging in the PLLs of the cervical spine, but they did not increase with aging in the PLLs of the thoracic and lumbar spine. In contrast, iron decreased gradually with aging in the PLLs of the cervical spine. Regarding the relationships among elements, significant correlations were found among the contents of calcium, phosphorus, magnesium, and sodium in the PLLs of the cervical spine.
authors.affiliation: Laboratory of Cell Biology, Department of Anatomy, Nara Medical University, Kashihara, Japan.
authors.forename: Masako
authors.initials: M
authors.lastname: Utsumi
authors.forename: Cho
authors.initials: C
authors.lastname: Azuma
authors.forename: Setsuko
authors.initials: S
authors.lastname: Tohno
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Tohno
authors.forename: Yumi
authors.initials: Y
authors.lastname: Moriwake
authors.forename: Takeshi
authors.initials: T
authors.lastname: Minami
authors.forename: Masa-Oki
authors.initials: MO
authors.lastname: Yamada
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology*; D002102:Cadaver; D002118:Calcium / Q000032:analysis*; D002574:Cervical Vertebrae / Q000033:anatomy & histology* / Q000601:surgery; D005260:Female; D006801:Humans; D007501:Iron / Q000032:analysis*; D017846:Longitudinal Ligaments / Q000737:chemistry*; D008274:Magnesium / Q000032:analysis*; D008297:Male; D013223:Statistics as Topic
chemical_list: D007501:Iron; D008274:Magnesium; D002118:Calcium