This is a dorsalroot ganglion (DRG) from a chicken embryo (around stage of day 7) after incubation overnight in NGF growth medium stained with anti-neurofilament antibody.
In anatomy and neurology, the dorsalroot ganglion is a nodule on a dorsalroot that contains cell bodies of neurons in afferent spinal nerves.
All of the axons in the dorsalroot convey somatosensory information, bringing sensory information into the brain and spinal cord.