Thursday, 25 June 2015

Skull sizes

 

A. SKULL

•    Cephalic Index = (Maximum breadth of skull/Maximum length of skull) × 100

•    It divides skull into 3 categories

     •    “DuMB”

1.  Dolico-cephalic (long-headed) C.I. 70 to 75

     •    seen in pure Aryans, Aborigines and Negroes.

2.  Mesaticephalic (medium headed) C.I. 75 to 80

     •    Majority of Indians are mesaticephalic*(Not to confuse with CI of Aryans)

3.  Brachycephalic (short headed) C.I. 80 to 85

     •    seen in Mongoloids (maximum C.I.).

 

B. BONES OF UPPER LIMBS

–   Brachial Index = (Length of Radius/Length of Humerus) × 100

 

c. BONES OF LOWER LIMBS

–   Crural Index = (Length of Tibia/length of Femur) × 100

–   For Indians Crural Index is 85 +/--2

–   Anterior curvature of Femur is distinct in NEGROID race*

     {N.B Intermembral Index = [ (Length of Humerus +Radius)/Length of Femur + Tibia] × 100}

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