We will follow the later development of the brain and neural tube in Chapter 8.

It has been possible to measure directly the forces that the cells generate during the formation of the neural tube.

One of these is seen immediately in front of the neural tube.

Gli1, Gli2 and Gli3, which are expressed in the neural tube.

If not, it may be that the neural tube is not completely closed.

The spinal cord is made from part of the neural tube during development.

Early expression in the primitive neural tube emerges at day E10.

It results when the upper part of the neural tube fails to close.

The spinal cord forms from the lower part of the neural tube.

A defect in which the neural tube fails to close.