![](/drem/stage20/labels2/S55L.gif)
![artifact separation(s), dural limiting membrane, edge of interpeduncular fossa, intermediate zone, loose connective tissue, marginal zone, osteogenic layer, subarachnoid space, sulcus limitans, surface ectoderm, tectum, tegmentum, trochlear nerve (CN IV), vascular plexus, ventricular zone](/drem/stage20/Z0/S55N.jpg)
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Carnegie Embryo #462 | Location: 1-03-01
Keywords: artifact separation(s), dural limiting membrane, edge of interpeduncular fossa, intermediate zone, loose connective tissue, marginal zone, osteogenic layer, subarachnoid space, sulcus limitans, surface ectoderm, tectum, tegmentum, trochlear nerve (CN IV), vascular plexus, ventricular zone
Source: The Virtual Human Embryo.