The effect on muscle contraction of sympathetic stimulation and of various modifications of conditions

The Influence of the Sympathetic Nerves on Skeletal Muscle

“…[The work of Orbeli is known to us only from references by Gantt (25), Walshe (70), and by Pulton (23).] Attempts by H. Wastl (72) to verify tbese results of Orbeli have failed; stimulation of the sympathetic led either to pronounced decrease in musele contractions, due doubtless to local vasoconstriction, or to no effects whatever.…”

The effect of sympathetic nerve stimulation on the power of contraction of skeletal muscle

“…Guglielmetti [1922], on the contrary, found an effect only with indirectly stimulated muscle, and suggested an action on the motor end-organ. Wastl [1925] obtained no effect on the directly stimulated frog's sartorius; while in indirectly excited mammalian muscle with circulation intact, adrenaline had usually a powerful depressant effect, due to vaso-constriction [Wastl, 1928].…”

The Transport of Gas by the Blood of the Turtle

“…Two features mark these curves as distinctive; (1) the greatest reduction of the carbon dioxide pressure attained fails to remove a residuum of 35 to 50 volumes per cent of combined carbon dioxide, and (2) the general slope of the curves is decidedly flatter than is usual in human blood. Since the completion of our experiments, Wasfl and Seli~kar (8) have published dissociation curves for the frog (Rana catesblana) which share these characteristics with the turtle, but have a general level intermediate between that of this reptile and that of man. The interpretation of these characteristics-, from the viewpoint of the blood as a physical system, is not difficult.…”