Is it farther or further?
"pertaining to a nerve or nerves," 1830, from Greek neuron "nerve" (see neuro-) + adjectival suffix -al (1). Related: Neurally.
neural neu·ral (nur'əl, nyur'-)adj.
Of or relating to a nerve or the nervous system.
Of, relating to, or located on the same side of the body as the spinal cord; dorsal.