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Orbital Muscles

Orbital muscles of ocular motility and eyelid elevation; rectus muscles, oblique muscles and the levator muscle

sr - superior rectus m.  

so - superior oblique m.  

mr - medial rectus m.  

lr - lateral rectus m.  

ir - inferior rectus m.  

io - inferior oblique m.  

l - levator m.  

There are 7 extraocular muslces in the orbit. The four rectus and two oblique muscles serve for ocular motility. The levator muscle elevates the upper eyelid.

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