Salivary alpha-amylase levels and hyperbolic discounting in male humans. Takahashi T, Ikeda K, Fukushima H, Hasegawa T. Clinical Trial 2007; 28(1): 17-20 PubMed PMID: 17277731 Keywords: Adolescent, Adrenal Medulla:physiology, Adult, Choice Behavior:physiology, Humans, Impulsive Behavior:metabolism, Male, Saliva:chemistry, Sympathetic Nervous System:physiology, Testosterone:metabolism, alpha-Amylases:analysis,. Citation OBJECTIVE: Little is known regarding the role of the sympathetic-adrenal-medullary (SAM) system in self-control and impulsivity in interte..... Read abstract Full text PDF