Development of ossification centres in the squamous portion of the occipital bone in man.

AUTOR(ES)

Srivastava, H C

RESUMO

The development of ossification centres in the squamous portion of the human occipital bone is described on the basis of anomalies observed in a large series of skulls. The interparietal part develops from three pairs of centres in membrane--one pair for the lateral plates, one pair for the central piece, and the third pair representing the pre-interparietals. The supraoccipital part develops from five centres in cartilage--two centres for each lateral segment and a single centre for the central segment. The supraoccipital part extends from the posterior margin of the posterior condylar fossae to about 2 cm above the external occipital protuberance and about 0.4 cm above the superior nuchal line near the lambdoid suture.

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