Pediatric Radiology

, Volume 7, Issue 1, pp 1–3 | Cite as

The normal calvaria indices of the human skull 1. Absolute measurements 2. Proportional measurements

  • H. Nyland
  • K. G. Krogness


Using the bony reference points: Nasion (N), Tuberculum sellae (Ts), Bregma (B), Lambda (L) as well as Twining's line (Tw) the normal position of bregma, lambda and internal occipital protuberance can be expressed in proportional measures by the ratios: N-Ts/B, N-Ts/L and N-Ts/Tw. Thus the growth rate of the human calvaria is expressed as a proportion of the anterior cranial base and found to be independent of the shape and age of the skull.

Key Words

Craniometry Human calvaria ratios Skull growth development 


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Copyright information

© Springer-Verlag 1978

Authors and Affiliations

  • H. Nyland
    • 1
  • K. G. Krogness
    • 1
  1. 1.Department of NeurosurgeryUniversity Hospital, Haukeland sykehusBergenNorway

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