Multiple types of neural tissues arise from the neural crest, including sympathetic ganglia, parasympathetic ganglia, spinal ganglia and the enteric nervous system. Non-neural cells derived from the neural crest include melanocytes, satellite cells of ganglia, Schwann cells and the adrenal medulla.
The definition of a soffit is the underside of a piece of architecture. An example of a soffit is the underside of an arch. soffit. the horizontal underside of an eave, cornice, etc. soffit.
The soffit board is tucked away under the fascia board. It is usually the board that you see most of from street level. The soffit can be ventilated to allow the flow of air into the roof area. Alternatively, ventilation can be provided over the top of the fascia board. Many people prefer the latter solution these days.