Changes

Snakes have a typical reptilian nervous system.

Snakes have a typical reptilian nervous system.

==Brain==

==Brain==

The brain is elongate and consists of forebrain (telencephalon and diencephalon) and brain stem (midbrain and hindbrain).  The most significant difference to mammals and birds is the presence of the dorsal ventricular ridge in the telencephalon.  The auditory portion of the midbrain appears better developed than would be expected. The tangential vestibular nucleus is well developed. The optic lobes of the midbrain receive primary input from the [[Snake Eye|eye]] and secondarily from [[Snake Special Senses|olfactory and auditory centres]]. The medulla of the hindbrain is better developed than that of [[Lizards|lizards]] and partially encloses the large fourth ventricle.  There is no true subarachnoid space in reptiles, which is an important consideration if attempting to collect cerebrospinal fluid.

The brain is elongate and consists of forebrain (telencephalon and diencephalon) and brain stem (midbrain and hindbrain).  The most significant difference to mammals and birds is the presence of the dorsal ventricular ridge in the telencephalon.  The auditory portion of the midbrain appears better developed than would be expected. The tangential vestibular nucleus is well developed. The optic lobes of the midbrain receive primary input from the [[Snake Eye|eye]] and secondarily from [[Snake Special Senses|olfactory and auditory centres]]. The medulla of the hindbrain is better developed than that of lizards and partially encloses the large fourth ventricle.  There is no true subarachnoid space in reptiles, which is an important consideration if attempting to collect cerebrospinal fluid.

==Spinal cord==

==Spinal cord==