68 LABORATORY MANUAL OF ANTHROPOMETRY 



nasion-prosthion line [12] X 100 



30. Vertical cranio-facial index 



basion-bregma line [4a] 



IV. INDICES EMPLOYING THE LINES DERIVED FROM A MEDIAN SAGITTAL 



CRANIOGRAM 



Since certain lines and linear measurements, as stated above, may 

 be taken either direct or by means of the median sagittal craniogram, 

 necessitating their appearance in two places, so is also the case with 

 the indices constructed from them; and, as in the former case, certain in- 

 dices are here repeated, always with their old numbers. 



^ _ 7 , . , , • , basion-bregma height [4al X 100 



2. Lenqth-heiqht index = — — r^r-j rrn^ri — 



maximum cranial length [1] 



[For classification of the resulting indices, see above.] 



„ „ , • 7 7 • 7 , • 7 calvarial height [48] X 100 



5. Calvarial heiqht index - — ; — ° — r . t^^. — 



nasion-mion line [33] 



[The calvarial height is to be taken fiom the craniogram; the 

 nasion-inion line from either the same source, or by direct 

 measurement]. 



_ „ .... 7 nasion to foot of bregma perpendicular X 100 



6. Breqma position index — — : — r — 



nasion-mion line 



[As in the last two, the numerator is measured upon the cranio- 

 gram; the denominator by either method. The lesser the value 

 of the index the further forward the bregma position, and con- 

 sequently the more erect the position of the frontal bone]. 



basion-prosthion line [10] X 100 



28. Longitudinal cranio-facial index 

 30. Vertical cranio-facial index 



maximum cranial length [1] 

 nasion-prosthion line [12] X 100 



31. Lambda calvarial height index 



basion-bregma height [4a] 

 lambda calvarial height [49] X 100 



nasion-lambda line [46] 



[As in the last, both measures may be taken from the craniogram; 



or the nasion-lambda may be measured direct]. 



or . r, , 7 ,. , . 7 frontal perpendicular [51] X 100 



32. t rontal perpendicular index - —f — —-; — . . ,' — 



frontal chord [42] 



[The lower this index the flatter the forehead. This has nothing 

 to do with the position of the contour line, i.e., whether 

 the forehead is "high" or "retreating," but refers solely to the 

 shape of the contour, however placed with reference to the entire 

 skull]. 



parietal perpendicular [52] X 100 



33. Parietal perpendicular index 

 [A low index signifies a flal 



34. Occipital perpendicular index 



parietal chord [43] 

 [A low index signifies a flat contour]. 



occipital perpendicular [53] X 100 



occipital chord [44] 

 [A low index signifies a flat contour]. 



