Adrenal glands: nerve supply of, 37; stimulated in emotion, 52-59, 62-63; stimulated in pain, 59-62, 63; in relation to blood sugar, 77; removal of, causes muscular weakness, 81; secretion of, improves contraction of fatigued muscle, 92; variations in adrenin content of, 171; latent period of, when splanchnics stimulated, 188; amount of secretion from, when splanchnics stimulated, 198; fatigue of, 199; stimulated by asphyxia, 206-208. Adrenin: secreted by adrenal glands, 36; action of, identical with sympathetic impulses, 37, 64; secretion of, by splanchnic stimulation, 41-43; secreted in emotional excitement, 44, 52-59; method of testing for, in blood, 47-50; secreted in emotion, 52-59, 62-63; disappearance of, from blood, 58; secreted in pain, 59-62, 63; effects of, when injected into body, 64-65; effect of, on distribution of blood in the body, 107; quickly restores fatigued muscle to normal irritability, 119-123; specific in its restorative action, 124-128; as an antidote to muscular metabolites, 129; restores fatigued denervated muscle to normal irritability, 130; point of action of, in muscle, 128-133; antagonistic to curare, 132; induces rapid coagulation of blood, 136, 147 ff.; not the direct cause of rapid coagulation, 156-158; fails to shorten coagulation time in absence of intestines and liver, 157-158; variable amount of, in adrenal glands, 171; emergency functions of, 185 ff.; utility of, in bettering the contraction of fatigued muscle, 194-195; not a check to use of sugar in the body, 197, 199; amount of, secreted when splanchnics stimulated, 198; a condition for increase of blood sugar, 199; stimulates the heart, 191, 201; dilates the bronchioles, 204; secretion of, increased in asphyxia, 206-208. Amyl nitrite: effect of, on contraction of fatigued muscle, 126. Anger: associated with action, 188; energizing influence of, 216. Antagonisms: autonomic, 34; in relation to emotions, 38; between cranial and sympathetic divisions, 268-270; between sacral and sympathetic divisions, 270-272. Appetite: compared with hunger, 233, 235; operation of, after section of vagus and splanchnic nerves, 240. Arterial blood pressure: increased in excitement, 95; artificial methods of increasing, 97; influence of different heights of, on fatigue, 97-102; influence of increase of, on fatigue, 97-102; influence of decrease of, on fatigue, 102-104; the “critical region” in decreasing, 104; explanation of effects on fatigued muscle, of varying, 104-106; value of increased, in pain and emotion, 106. Arteries: innervation of, 26. Asphyxia: increases adrenal secretion, 206-208; increases sugar in blood, 209. Athletes: glycosuria of, after games, 75.