Tonicity, the ability of a solution to cause water movement
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Muscle tone, the continuous and passive partial contraction of the muscles
Leo Sowerby, a leading American cathedral organist-composer, described Whitehead's Benedicite, based on the Gregorian Tonus peregrinus, as the "best Benedicite" he knew.
He found out that tension and exertion was always accompanied by a shortening of the muscular fibres, that the reduction of the muscular tonus decreased the activity of the central nervous system, that relaxation was the contrary of states of excitement and well suited for a general remedy and prophylaxis against psychosomatic disorders.