Board Thread:Questions and Answers/@comment-17722079-20130927153503/@comment-5178018-20130927203135

Well if you think about it, the cerebral cord (the cord that carries commands through the body [e.g. running, swinging your arms, standing up, and sitting down]) on humans runs straight down the inside of the spine. I would guess that on the anatomy of a Nargacuga the spine carries the cerebral cord down it's body and down towards the tip of it's tail, which may also give some explanation towards it's ability to extend it's tail spikes when enraged.