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Journal of Biological Rhythms|January 1, 1994
Twenty-four-hour rhythms in relation to the natural photoperiod: a field study in humansM L Laakso, T Porkka-Heiskanen, A Alila, et al.Hormone Research|January 1, 1989
Effect of neonatal androgenization on the testosterone feedback sensitivity in adult rats in two lighting conditionsT Porkka-Heiskanen, M L Laakso, G Johansson, et al.Acta Physiologica Scandinavica|October 1, 1990
Testosterone elevates pituitary prolactin content of long-term castrated rats under constant but not under periodic lightT Porkka-Heiskanen, M L Laakso, D Stenberg, et al.Journal of Reproduction and Fertility|September 1, 1992
Increase in testosterone sensitivity induced by constant light in relation to melatonin injections in ratsT Porkka-Heiskanen, M L Laakso, D Stenberg, et al.Neuroscience|June 19, 2007
Glutamatergic stimulation of the basal forebrain elevates extracellular adenosine and increases the subsequent sleepH-K Wigren, M Schepens, V Matto, et al.Journal of Pineal Research|January 1, 1990
Correlation between salivary and serum melatonin: dependence on serum melatonin levelsM L Laakso, T Porkka-Heiskanen, A Alila, et al.Hormone Research|January 1, 1989
Lighting conditions affect testosterone feedback sensitivity in castrated ratsT Porkka-Heiskanen, M L Laakso, D Stenberg, et al.Journal of Neurochemistry|October 13, 2006
Nitric oxide production in the basal forebrain is required for recovery sleepA V Kalinchuk, Y Lu, D Stenberg, et al.The American Journal of Physiology|August 1, 1990
Lighting conditions affect serum and pituitary TSH in male ratsM L Laakso, T Porkka-Heiskanen, D Stenberg, et al.Journal of Sleep Research|November 14, 1997
Sleep deprivation increases somatostatin and growth hormone-releasing hormone messenger RNA in the rat hypothalamusJ Toppila, L Alanko, M Asikainen, et al.Pageof 4