Question:medium
Yoke muscle of the right lateral rectus is:
Yoke muscle of the right lateral rectus is:
Show Hint
In right gaze, which left-eye muscle adducts alongside it?
Updated On: Jun 24, 2026
- Left medial rectus
- Left superior rectus
- Left lateral rectus
- Left inferior oblique
Show Solution
The Correct Option is A
Solution and Explanation
Step 1: Conjugate eye movements rely on yoke muscles - one muscle in each eye that fire together so both eyes point the same way.
Step 2: Consider gaze to the right: the right eye must turn outward, which is the job of the right lateral rectus.
Step 3: At the same instant the left eye must turn inward toward the nose to stay aligned, and the muscle that adducts the left eye is the left medial rectus.
Step 4: Since these two work in concert for rightward gaze, the yoke partner of the right lateral rectus is the left medial rectus.
\[\boxed{\text{Left medial rectus}}\]
Step 2: Consider gaze to the right: the right eye must turn outward, which is the job of the right lateral rectus.
Step 3: At the same instant the left eye must turn inward toward the nose to stay aligned, and the muscle that adducts the left eye is the left medial rectus.
Step 4: Since these two work in concert for rightward gaze, the yoke partner of the right lateral rectus is the left medial rectus.
\[\boxed{\text{Left medial rectus}}\]
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