[The effect of music embedded with binaural beats on heart rate parameters during nap].

Objective: To test hypothesis that music embedded with binaural beats can boost activity of parasympathetic part of autonomic nervous system (PPANS) with the development of nap.

Material And Methods: The power of high-frequency component of heart rate variability spectrum computed on successive 2-minute intervals during 20-minute nap was a comparison criterion. The criterion was compared during nap accompanied by music with embedded binaural beats (stimulus condition) and nap in silence (control condition).

Collagen Hydrolysis Products Reduce the Formation of Stress-Induced Ulcers by Regulating Stress-Associated Activation of the Neuroendocrine and Immune Systems.

We studied the effect of collagen fragments (PGP and AcPGP) on serum content of epinephrine, corticosterone, and IL-1β in rats subjected to water-immersion stress. The degree of local inflammation accompanying ulceration was assessed by IL-1β production by ln. gastricus caudalis cells.