Effect of alcohol on psycho-physiological functions . es the base-line more gradually. The errors inreading these curves will tend to cancel each other, as far as the averagelatency is concerned, but will, on the other hand, increase somewhatthe mean variation. As both points are more definitely fixed for meas-uring the curves produced by 50-gram stimuli, the errors of observa-tion should be smaller, and as the mean variation for latency in the caseof both reflexes produced by both intensities is almost identical, itseems that the actual variations in latency for the reflexes from the 50-gram
Effect of alcohol on psycho-physiological functions . es the base-line more gradually. The errors inreading these curves will tend to cancel each other, as far as the averagelatency is concerned, but will, on the other hand, increase somewhatthe mean variation. As both points are more definitely fixed for meas-uring the curves produced by 50-gram stimuli, the errors of observa-tion should be smaller, and as the mean variation for latency in the caseof both reflexes produced by both intensities is almost identical, itseems that the actual variations in latency for the reflexes from the 50-gram stimulus must theoretically be somewhat larger. Probably a 50-gram stimulation was too strong for the best condition of normal relax-ation with this subject, as the large contraction of the quadriceps muscleof the left leg must almost necessarily have tended to produce a pre-paratory stiffening of the whole body, even though the subject saidHa after each blow, and the excessive contraction of the muscle is 1 Hoffman, Arch. f. Physiol., 1910, p. Fig. 1.— llnr-reflex records from 30-gram and 50-gram stimuli. Patellar Reflex. 45 certain to produce changes in the position of the leg in relation to thestimulus apparatus. Since L and L, and A and A were measured with two stimulus inten-sities, there are eight products for each period of experimentation. Theeffect of 30 of alcohol upon these various factors and their relation-ship may be more clearly seen if they are given in diagrammatic 2 and 3 are plotted from the percentage effects of alcohol on thelatency and amplitude as given in section in of tables 3 and 4, the pluspercentages being above and the minus percentages below the base light and heavy lines in both figures represent the first reflex pro-duced by the 30-gram and 50-gram stimuli, respectively, (L in figure2 and A in figure 3) and the light and heavy broken fines the secondreflex within the refractory phase (1/ in figure 2 and A
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