Divergence of smooth muscle target and sympathetic pathway cell phenotypes in the orbit of the developing rat.

Abstract excerpt

The periorbital sheath serves as a major pathway for sympathetic nerves traveling to distal orbital targets in the rat. This tissue accommodates sympathetic fiber sprouting in the neonate but becomes impassable by postnatal day 30 (PND 30). In contrast, smooth muscle target remains receptive to sympathetic ingrowth. To determine the attributes of receptive and nonreceptive tissues, we compared periorbital pathway...

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