Patellar Reflex. 37 



research, in which only dose A was used. 1 In this report an effort has 

 been made to employ uniform tabular presentation for the different 

 measurements, and thereby to facilitate comprehension of the data and 

 any comparison that the reader might desire to make. 



PATELLAR REFLEX. 



The patellar-reflex data are given in tables 3 and 4, table 3 showing 

 the values for the reflex caused by the first stimulus and table 4 those for 

 the second reflex, which came within the relatively refractory period. 

 Each table is divided into three sections, as follows : Section i, normal 

 and alcohol measurement values for the latency (L) and amplitude (A) 

 of the reflexes, i.e., the actual averages for the respective periods on the 

 different days stated for 30-gram and 50-gram stimuli separately, and 

 accompanied by average mean variations ; section n, normal and alco- 

 hol differences, which are found by subtracting first-period values 

 from those which succeed; and section in, the effects of alcohol com- 

 puted from the differences and expressed in these terms and also in per 

 cent, together with the ratio of the differences to their probable errors 

 and the probable correctness of the differences. 



The first column in table 3, headed "Experiment and stimulus," 

 specifies the nature of the experiment (normal or alcohol), the date, and 

 the weight in grams of the hammer falling through an arc of 90°, a 

 vertical distance of 20 cm., which produced the stimulus for the reflex. 

 Under the caption " Period I" are the averages for L (latency) and A 

 (amplitude) for the first set of reflexes on the different days and with 

 the respective intensities of stimulation. 2 The relative position of the 

 dose, which was control or alcohol according to the kind of experiment, 

 come between periods 1 and 2. Following the drinking of the dose, 

 sets of reflexes were recorded for periods 2 to 6 as indicated. The 

 results ior normal days and alcohol days are grouped and averaged 

 separately in the different sections of the table. Table 4, showing 

 the values for the second reflex, follows the form of the preceding 

 table, the designations L' and A' being used for the latency and am- 

 plitude, respectively. 



The patellar reflex was the first one of the group of ten different 

 measurements which together required approximately 50 minutes for 

 their completion. Since each measurement occupied the same position 

 in the group, it is evident that the time elapsing from the first perform- 

 ance of the individual test, as, for example, the patellar reflex, until the 

 last repetition of it during the day, would be approximately 4 hours. 

 The averages in section i for June 29, period 4 (L, 35 and 34 <r, and A, 



1 The tables in the Dodge and Benedict report in which the effect of doses A and B are averaged 

 together are as follows: Nos. 3, 14, 15, 46, and 50. 



2 In Dodge and Benedict's report, R' and R" were used to designate latency and H' and H" 

 for amplitude for the first and second reflexes, respectively. 



