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Why does the cervical vertebrae contain more white matter than the more lower parts of the spinal cord, like the lumar vertebrae?

In white matter are the axons of interneurons.

Anyone know this?

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  • $\begingroup$ This is true according to my book, but why? $\endgroup$ – mathomato Nov 19 '19 at 15:51
  • $\begingroup$ Try thinking about where those axons are going and where they are coming from, does that help? $\endgroup$ – Bryan Krause Nov 19 '19 at 15:58
  • $\begingroup$ They signals come from the receptors and go to the brain and then they get back to the muscles/glands. But I dont see why you would need more axons around your neck, instead of your trunk, because thats where most body parts are. $\endgroup$ – mathomato Nov 19 '19 at 16:06
  • $\begingroup$ Try drawing a simple diagram where you connect the brain to muscles in the body with wires, and in another color from the peripheral receptors to the brain, and see what it looks like. $\endgroup$ – Bryan Krause Nov 19 '19 at 16:09
  • $\begingroup$ Btw I am Dutch. Peripheral means in the non-central nerve system right? $\endgroup$ – mathomato Nov 19 '19 at 16:12
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There is more white matter upwards because there all the axons meet up, causing it to be more white, due to myelinated cells of Schwann.

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  • $\begingroup$ Welcome to Biology.SE! I'm sorry you're not receiving a more positive response to your first posts, but I encourage you to persevere — as a first step please take the tour and then consult the help pages for additional advice on How to Answer and How to Ask questions effectively on this site. ——— Specifically, this answer sounds reasonable, but it is much more likely to receive a favorable response if you include supporting references (primary literature is best, but a textbook available online would seem sufficient for this question). Thanks! 😊 $\endgroup$ – tyersome Nov 24 '19 at 2:04

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