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inferior rectus muscle

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inferior rectus muscle
n.
A muscle with origin from the inferior part of the tendinous ring, with insertion into the sclera of the eye, with nerve supply from the oculomotor nerve, and whose action directs the pupil downward and medialward.


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Ampullofugal stimulation of the cupula of the posterior semicircular canal leads to vertigo and to an up-beating and torsional nystagmus secondary to the contraction of the ipsilateral right superior oblique muscle ipsilateral to the posterior semicircular canal and of the contralateral inferior rectus muscle.
[92,93] Signals from the posterior semicircular canal go to the ipsilateral superior oblique and contralateral inferior rectus muscles.
Superiorly, the lesion extended through the orbital floor in the retroocular region, displacing the inferior rectus muscle superiorly (figure 1, B).
 
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