different between ganglia vs ganglionic

English

ganglia

plural of ganglion -- clusters of nerves
- 1871, Charles Darwin, The Descent of Man
  ... the wonderfully diversified instincts, mental powers, and affections of ants are notorious, yet their cerebral ganglia are not so large as the quarter of a small pin's head.

From ganglion +? -ic.

ganglionic (not comparable)

Of, pertaining to, or composed of ganglia.
- Episode 12, The Cyclops
  The distinguished scientist Herr Professor Luitpold Blumenduft tendered medical evidence to the effect that the instantaneous fracture of the cervical vertebrae and consequent scission of the spinal cord would, according to the best approved tradition of medical science, be calculated to inevitably produce in the human subject a violent ganglionic stimulus of the nerve centres of the genital apparatus...