Hervé Beck

TL;DR: The circadian rhythms of plasma levels of melatonin, prolactin and LH are not modified in old age nor in dementia, and a positive correlation has been demonstrated in young men between melatonin and LH and betweenmelatonin and Prolactin, but no such correlation could be found in the elderly.

TL;DR: The process of ageing, and the possible alterations in the central nervous system which are often seen in normal ageing, induced no major modifications in the temporal organization of adrenocortical function, even in subjects who were very advanced in age.

TL;DR: The circadian and seasonal variations of a set of routinely determined variables (chloride, sodium, potassium, calcium, inorganic phosphorus, magnesium, creatinine, urea and urate) were documented in young men and in healthy elderly men and women and validated by ANOVA for most of the plasma variables and for urinary calcium, phosphorus and uric acid.

TL;DR: A statistically significant circadian rhythm is detected in three of the groups: young males, elderly males and elderly females (no rhythm detection in elderly insane subjects).

TL;DR: The persistence of a circannual rhythm of plasma LH with large amplitude in elderly subjects, associated with high mean levels of the hormone, especially in elderly women, suggests that this bioperiodicity of the pituitary gland is independent of gonadal function.