Movement Disorders
Chorea
Jun. 06, 2023
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Histological observations on the right accessory rectus muscle
(a) Part of the superior head of the right accessory rectus muscle. Fibers of striated skeletal muscle have been visualized (H&E stain, x10 objective). (b) Sample fibers of striated skeletal muscle obtained from the superior head of the right accessory rectus muscle. The striations of skeletal muscle tissue have been visualized (H&E stain, x40 objective). (c) Part of the inferior head of the right accessory rectus muscle shown near its origin from the inferior rectus muscle. Fibers of striated skeletal muscle as well as cross sections of small nerves (marked by white arrowheads) have been visualized (H&E stain, x10 objective). (d) Sample fibers of striated skeletal muscle obtained from the inferior head of the right accessory rectus muscle. The striations of skeletal muscle tissue have been visualized (H&E stain, x40 objective).
Abbreviations: An, anterior; Po, posterior.
(Source: Haładaj R, Wysiadecki G, Polguj M, Topol M. Bilateral muscular slips between superior and inferior rectus muscles: case report with discussion on classification of accessory rectus muscles within the orbit. Surg Radiol Anat 2018;40[7]:855-62. Creative Commons Attribution 4.0 International [CC BY 4.0] license, creativecommons.org/licenses/by/4.0.)