Complete loss of muscle function of either one or more muscle groups.

The parasympathetic system, along with the sympathetic system are divisions of the autonomic nervous system.  The parasympathetic system is associated with the 'rest and digest' functions such as salivation and lacrimation.

Partial loss or impaired movement.

An anatomical term meaning 'towards the front'.  Conversely 'caudal' means 'towards the back'

A type of glial cell that produces myelin which wraps around some peripheral nerve fibre axons.

Sulci are the grooves on the surface of the brain.