Concept
Version 13
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Pain Sensation
![Gray matter in the spinal cord](../../../../../../../../../figures.boundless-cdn.com/6598/raw/-substantia-grisea-english.jpg)
Gray matter in the spinal cord
A delta fibers (Aδ fibers), a type of sensory fiber, are associated with the sensation of cold and pressure. Aδ fibers are thinly myelinated; therefore, they conduct signals more rapidly than unmyelinated C fibers, but more slowly than other, more thickly myelinated "A" class fibers. Aδ fibers terminate at Rexed laminae I and V (labeled I and V in the diagram). C fibers respond to thermal, mechanical, and chemical stimuli and terminate at the Rexed lamina II (labeled II in the diagram).
This is a drawing of gray matter in the spinal cord. It shows the Aδ fibers terminating at Rexed laminae I and V (labeled I and V in the diagram). The C fibers respond to thermal, mechanical, and chemical stimuli and terminate at the Rexed lamina II (labeled II in the diagram).
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Medulla spinalis - Substantia grisea - English."
http://en.wikipedia.org/wiki/File:Medulla_spinalis_-_Substantia_grisea_-_English.svg
Wikipedia
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