Anatomy ADSL question-please help

[Turtle]

Does anyone know the answer to ""Why does the cross-section appearance of the spinal cord change, from above downwards?".
-I can't quite work out why, I know the bones change shape as you move down the spine, but why would the inside of the spinal cord change?
thanks

[Russ]

From what levels?

The cord itself changes in anatomical layout gradually and culminates in the cauda equina iirc

[simpak]

The answer is to do with which nerve fibres will be most frequent along the cord, if I recall correctly.  Ie, when you're closer to the bottom there will be fewer fibres because some of them have already branched off earlier.

My actual answer says a decrease in the size of white matter funiculi down the spinal cord due to fewer efferent/afferent fibres.