The coccygeal dorsal root ganglia are small swellings located on the coccygeal dorsal roots, proximal to where the dorsal roots join with the ventral roots.  They are situated within the dura mater.

The coccygeal dorsal root ganglia are formed by the cell bodies of somatic and visceral afferent neurons.  Each neuron has a single short axon, which divides into a medial branch entering the spinal cord via the dorsal root, and a lateral branch passing peripherally to a sensory end organ.