Duane's Retraction syndrome Type 3 is defined by which limitation?

Prepare for the NBEO Ocular Motility Test. Practice with questions and explanations to enhance your understanding. Get ready for your exam easily!

Multiple Choice

Duane's Retraction syndrome Type 3 is defined by which limitation?

Explanation:
Duane's Retraction Syndrome arises from miswiring of the lateral rectus motor input, so the eye movements are abnormal and there is globe retraction with certain gaze attempts. The types are distinguished by which directions of horizontal movement are restricted. In this pattern, both horizontal movements are limited—abduction and adduction. This occurs because the misinnervation leads to co-contraction of the medial and lateral rectus muscles, especially when trying to move the eye inward (adduction), causing restriction in both directions. The hallmark feature of this type is exactly that combined limitation, setting it apart from the other types where only one direction is restricted.

Duane's Retraction Syndrome arises from miswiring of the lateral rectus motor input, so the eye movements are abnormal and there is globe retraction with certain gaze attempts. The types are distinguished by which directions of horizontal movement are restricted. In this pattern, both horizontal movements are limited—abduction and adduction. This occurs because the misinnervation leads to co-contraction of the medial and lateral rectus muscles, especially when trying to move the eye inward (adduction), causing restriction in both directions. The hallmark feature of this type is exactly that combined limitation, setting it apart from the other types where only one direction is restricted.

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