Differentiation of the nuclear groups in the posterior horn of the human embryonic spinal cord

A. Pytel; M. Bruska; W. Woźniak

Vol 70, No 4 (2011)

Original article

Submitted: 2012-06-27

Published online: 2011-11-25

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Differentiation of the nuclear groups in the posterior horn of the human embryonic spinal cord

A. Pytel, M. Bruska, W. Woźniak

Folia Morphol 2011;70(4):245-251.

Vol 70, No 4 (2011)

ORIGINAL ARTICLES

Submitted: 2012-06-27

Published online: 2011-11-25

Abstract

The formation of nuclear groups in the posterior horns of the human embryonic spinal cord was traced in serial sections of embryos of developmental stages 13 to 23 (32 to 56 postovulatory days). The following observations, new for the human, are presented: 1. The differentiation of the neural tube into 3 zones (germinal, mantle and marginal) is detected in the middle of the 5^th week. 2. The primordia of the posterior horns are marked at stage 14 (33 days). 3. In the middle of the 7^th week the nucleus proprius and substantia gelatinosa are discerned. 4. Differentiation of the nuclei within the posterior horns proceeds in the ventrodorsal and rostrocaudal gradients. (Folia Morphol 2011; 70, 4: 245–251)