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Photomontage of a transverse section showing the cervical spinal cord and attached DRG of an animal treated intrathecally with NGF via an upper cervical cannula. BDNF protein is transported by DRG cells along their central processes and into the spinal cord. BDNF levels have increased to such an extent that immunoreactive axons can be traced from DRG cells, along a dorsal root and into the dorsal horn of the spinal cord. Scale bar, 250 μm.
