130 LABORATORY MANUAL OF ANTHROPOMETRY 



2 Maximum breadth; across the bone from side to side, at right 

 angles to the previous measurement. SC. 



3 Maximum thickness; taken by placing the patella in the sagittal 

 plane between the two arms of the slide compass. SC. 



Then follow certain definite measures of the articular surfaces, which 

 can be devised by the investigator in accordance with what he wishes to 

 show. Martin suggests the height (proximo-distal) of the entire arti- 

 cular surface, and the breadth of the two lateral facets. For indices he 

 suggests :- 



1 Height index; this compares the height of the patella with the com- 

 bined length of femur and tibia, and in order to make a comparison 

 between two measurements of such different proportions, he takes a 

 tenth of the latter measure, or, what is the same thing, multiplies the 

 numerator (height of the patella) by 1000 instead of 100, thus 



Maximum height of patella (1) X 1000 

 length of femur + length of tibia 



For definite values of this index he suggests, 



low patella below 50 



medium height 50-55 



high patella 55 + 



2. Breadth index; he avoids dealing with such disparity in numbers 

 by comparing the patellar breadth with the breadth of the femoral 

 epicondyles, thus, 



maximum breadth of patella (2) X 100 

 epicondylar breadth of femur 

 values : 



narrow patella below 51 



medium breadth 51-56 



broad patella 56 + 



3. Height-breadth index of patella; this is simply the index of the two 

 main dimensions of the patella, considered as a disc; measurements 

 1 : 2, thus 



maximum height of patella X 100 

 maximum breadth of patella 



Tibia 



I. Measurements 



A. Lengths. 



1 Maximum length (spino-malleolar) measured with the inclusion of 

 the intercondylar and malleolar spines, and hence possible on complete 

 bones only. OB 



2 Maximum length (condyle- malleolar); measured with the calipers 



