A lesion in the left frontal eye fields would most likely cause a defect in saccades toward which direction?

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

Multiple Choice

A lesion in the left frontal eye fields would most likely cause a defect in saccades toward which direction?

Explanation:
Frontal eye fields initiate voluntary horizontal saccades to the opposite side. A lesion in the left frontal eye field disrupts the command to move the eyes to the right, so rightward saccades are impaired while saccades to the left (and vertical movements) are preserved because they rely on other circuits. In short, a left frontal eye field lesion blocks rightward gaze.

Frontal eye fields initiate voluntary horizontal saccades to the opposite side. A lesion in the left frontal eye field disrupts the command to move the eyes to the right, so rightward saccades are impaired while saccades to the left (and vertical movements) are preserved because they rely on other circuits. In short, a left frontal eye field lesion blocks rightward gaze.

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