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Atlas of Human Embryos Chapter   Figure

L-1 spinal ganglion, L-2 ventral root (motor), L-3 spinal ganglion, L-3 ventral root, L-4 spinal ganglion, L-4 ventral root, L-5 spinal ganglion, S-1 spinal ganglion, basal plate, dermatome remnant, edge of L-2 spinal ganglion, ependymal layer, mantle layer, marginal layer, myotome, neural arch, neural canal, sulcus limitans

A section through the L-1 to S-1 spinal ganglia.

Observe:
1. The basal plate and neural canal in longitudinal section.
2. The ventral roots of the lumbar spinal nerves emerging from the basal plate.
3. The intersegmental position of the neural arches.
4. The epitheloid remnants of the dermatome.


Keywords: L-1 spinal ganglion, L-2 ventral root (motor), L-3 spinal ganglion, L-3 ventral root, L-4 spinal ganglion, L-4 ventral root, L-5 spinal ganglion, S-1 spinal ganglion, basal plate, dermatome remnant, edge of L-2 spinal ganglion, ependymal layer, mantle layer, marginal layer, myotome, neural arch, neural canal, sulcus limitans

Source: Atlas of Human Embryos.