Effect of alcohol on psycho-physiological functions . ough here again the larger varia-tions are found in the case of the lid reflex. It is further to be notedthat the mean variations for the latency and amplitude of the lid reflexare not so large in those periods which follow the ingestion of alcohol. The effect of alcohol upon the protective lid reflex may be seen insection in in both tables 5 and 6. For convenience of comparison thepercentile effects are also given in diagrammatic form in figures 4 and5, which show the latency and amplitude, respectively. The solid linerepresents the percen
Effect of alcohol on psycho-physiological functions . ough here again the larger varia-tions are found in the case of the lid reflex. It is further to be notedthat the mean variations for the latency and amplitude of the lid reflexare not so large in those periods which follow the ingestion of alcohol. The effect of alcohol upon the protective lid reflex may be seen insection in in both tables 5 and 6. For convenience of comparison thepercentile effects are also given in diagrammatic form in figures 4 and5, which show the latency and amplitude, respectively. The solid linerepresents the percentile effect on the primary reflex, the broken finethe reflex in the refractory phase. From figure 4 it is evident that thelatency of the reflex is considerably lengthened in those measurementswhich follow immediately the taking of alcohol (lid reflexes were nevermeasured earlier than 40 minutes after the dose). In period 3 thelatency is still lengthened, but not in such a marked degree. There is Lid Reflex. 53 Experimental periods after alcohol3 4 5. Fig. 4.—Effect of alcohol on latency of the lid reflex. C / ®^ -D +1 3~?•»?I—* 0w0 e a .J 7060SO40302010010 Expert mental perio is after alco hoi 1 i 11 1 Primary CA> • 111 * Secondary (A)—* 111 t \ 11 1 i t j •% k \ 111 111 i/i/ r^>^- 4 i \N 203040« 50 *>70 /1 \\ 111 r / / \ \ 111 -•* r \\ 111 .- \\ I1 » \ 1 11 1 Fio. 5.—Effect of alcohol on amplitude of the lid reflex. 54 Effect of Alcohol cm Psycho-Physiological Functions. a decrease in the latency in period 4, changing again to an increase inperiods 5 and 6. The curve for the secondary reflex latency followsfairly close to that of the primary reflex. The course of the alcohol effect upon the reflex amplitude, as repre-sented in figure 5, shows the greatest decrease in the amplitude in period2, a somewhat less decrease in period 3, a rise to an absolute increase inperiod 4, with a return below the base line for periods 5 and 6, that is,in the
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