There are several views of the brain and skull with labels in various languages.

http://www.uku.fi/laitokset/neuro/37the.htm

There are some MRI’s of the hippocampus and of other features of the brain affected by Alzheimer disease (i.e. AD) here. There is a long text giving useful background on AD also.

http://neurosurgery.mgh.harvard.edu/v-f-94-1.htm#Figures

There are several angiograms of patients with aneurisms at this site.

http://www.bic.mni.mcgill.ca/cgi/brainweb1?alias=phantom_1.0mm_normal_crisp

Colorized, rotatable MRI’s of various sections of the brain appear here

http://www.waisman.wisc.edu/~rowley/sb-kids/

This site is for parents who have children with spina bifida.

http://www.mcl.tulane.edu/student/1997/kenb/neuroanatomy/readme_neuro.html

This Tulane University site has slides of sections through the spinal cord.

http://www.usc.edu/hsc/neurosurgery/

There are articles explaining various types of brain tumors.

http://www.vh.org/Providers/Textbooks/BrainAnatomy/1SpinalCord.html

There are a variety of interesting spinal cord photographs here including a cross section in the cervical region and a view of an infant’s spinal cord and spinal nerves.

http://www.indiana.edu/~pietsch/postpoliosyndrome.html

Here’s a list of articles about polio.