Figure 5: ICV delivery of NGF induces glial proliferation along the neuraxis. Quantification of BrdU positive nuclei within the neuronal soma compartment of trigeminal ganglia and along the lumbar DRGs from levels L2 to L4 (a). The relative magnitude of the NGF-dependent response decreased along the rostral-caudal gradient of the neuraxis (b). Mean ± S.E.M.; * ; # .