Innervation of human bone periosteum by peptidergic nerves

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Abstract
Nerves exhibiting substance P‐like immunoreactivity were demonstrated in the human periosteum. A network of nerves showing substance P‐like immunoreactivity was seen in the periosteum, while finer strands of immunoreactive nerve fibers were present immediately beneath the surface of the periosteum. Enkephalin‐like immunoreactivity was also studied but could not be demonstrated. Substance P has previously been suggested to be involved in the mediation of the sensation of pain. The clinically observable marked pain sensitivity of periosteal tissue might be explained by the peptidergic nerves described in this paper.