I want to know the answer to the following question:
What is the electrically insulting material that sheaths a-delta fiber?
All the background I'm provided with is that "Because the A-delta fiber is thicker than the C fiber, and is thinly sheathed in an electrically insulating material (myelin), it carries its signal faster (5–30 m/s) than the unmyelinated C fiber (0.5–2 m/s).". Is that enough to answer the question?
Answer: yes