Riolan’s muscle
anatomy
Also known as: muscle of Riolan
Quick Summary
The muscle of Riolan is a small muscle located near the lid margins of the eyelid. It is part of the orbicularis oculi muscle and contributes to keeping the eyelids in close apposition, which aids in tear drainage. This muscle, along with Horner's muscle, is closely associated with the lacrimal apparatus. The orbicularis oculi muscle itself is responsible for closing the eyelids and is divided into orbital and palpebral portions. The palpebral portion is primarily involved in lid closure and blinking.1
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