Abstract
To study the structure and three-dimensional distribution of extraocular muscle Pulley in orbit. 5 fresh cadaver orbits were fixed in situ and serially sectioned at 4 microm thickness. Every nearby sections were stained using Masson's trichrome, Van Gieson'stain and immunohistochemical staining, the stained tissue was examined by gross anatomy and light microscopy. Near the equator of the globe, extraocular muscle Pulleys were at the points where rectus penetrate posterior Tenon's fascia, encircling the rectus orbit side by fiber ring structure. There was Pulley Band among extraocular muscle Pulleys. The main composition of the Pulley and Pulley Band were collagen (I and III type), elastic and smooth muscle. Constitution of Pulley provides dissection basis as the functional origins of the extraocular muscle.
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