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48 mm CRL
Transient zones, histogenesis of the neocortex.
At the 12th week of gestational development, the formation of transient zones continues. At this time, a clear characteristic structure can already be distinguished in the lateral and medial hemispheric walls, organized into five transient zones (Fig. 1):
ventricular zone, in which the cell bodies are densely located;
subventricular zone. During this period, the division of the subventricular zone into two subzones is already visible in the lateral wall: the sparse outer and dense inner parts;
intermediate zone;
undifferentiated cortical plate;
marginal zone
The medial wall of the hemisphere was narrower than the lateral one
48 mm CRL
Transient zones, histogenesis of the neocortex.
At the 12th week of gestational development, the formation of transient zones continues. At this time, a clear characteristic structure can already be distinguished in the lateral and medial hemispheric walls, organized into five transient zones (Fig. 1):
ventricular zone, in which the cell bodies are densely located;
subventricular zone. During this period, the division of the subventricular zone into two subzones is already visible in the lateral wall: the sparse outer and dense inner parts;
intermediate zone;
undifferentiated cortical plate;
marginal zone
The medial wall of the hemisphere was narrower than the lateral one