Figure 8. (A) Effect of vasoactive intestinal polypeptide (VIP) and neuropeptide Y (NPY) on neurite outgrowth of dissociated dorsal root ganglion cells coplated with spinal cord explants. (B) Effects of vasoactive intestinal polypeptide and neuropeptide Y on neurite outgrowth of dissociated dorsal root ganglion cells plated alone. (Reproduced with permission from White and Mansfield. [ 21 ])