Lateral extensions of the Müller muscle

Archives of Ophthalmology
A D MortonV A White

Abstract

To define the lateral extension of the Müller muscle and to elucidate its involvement in the development and surgical treatment of Graves (thyroid) eye disease. Twelve lateral halves of orbits exenterated from patients with medial or posterior orbital neoplasms were fixed, embedded, and step sectioned at 250-microns intervals to produce histological sections. Gross anatomical dissections of human cadaver heads were also used to corroborate the histological findings. Histological analysis revealed that the Müller muscle extended laterally between the orbital and palpebral lobes of the lacrimal gland in all specimens. The smooth muscle fibers were found to interdigitate with lacrimal ducts passing from the orbital to palpebral lobe and to extend close to the ductal orifices at the conjunctival surface. Gross dissections confirmed that the Müller muscle accompanied the levator aponeurosis lateral extension, which is known to pass between the orbital and palpebral lobes of the lacrimal gland. Our anatomical findings suggest that the Müller muscle may contribute to the temporal flare frequently seen in eyelid retraction associated with thyroid eye disease. They may also explain the difficulty of treating lateral eyelid retraction in...Continue Reading

Citations

Oct 11, 2005·Otolaryngologic Clinics of North America·Cat Nguyen Burkat, Bradley N Lemke
Aug 16, 2003·Ophthalmic Plastic and Reconstructive Surgery·Antonio A V CruzRoberto P Coelho
May 24, 2008·Eye·S Madhusudhan, K Puvanachandra
Jun 6, 2018·Ophthalmic Plastic and Reconstructive Surgery·Jonathan J Dutton
Dec 19, 2012·Ophthalmic Plastic and Reconstructive Surgery·Sara Filipa Teixeira RibeiroAntonio Augusto Velasco Cruz
Jan 6, 2000·Current Opinion in Ophthalmology·D R Meyer
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Mar 7, 2019·Archives of Craniofacial Surgery·Min Ji Kim, Tae Suk Oh
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Feb 2, 2021·Current Eye Research·Bruna S EquiterioStefania Diniz
Jul 2, 2010·Ophthalmology·Hirohiko KakizakiIgal Leibovitch

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