Frontal eye field - voluntary contralateral horizontal gaze

[MudPhud20XX]

---

Members don't see this ad.

Kaplan neuro has a question asking:

A lesion of a frontal eye field would most likely result in which of the following?
Answer: Deviation of eyes toward the lesion

Is this b/c the frontal eye field helps the voluntary contralateral horizontal gaze?

So if I have a lesion in my Lt. frontal eye field what exactly would my symptoms be?

Both of my eyes deviating toward Lt? If so, will my Rt eye deviate more than my Lt eye since the lesion is in the Lt. frontal lobe?

Or just my Rt eye deviating toward Lt?

Many thanks in advance.

 

[alicealicealice]

Just like the R occipital lobe is responsible for detecting the left half of the world (input from both eyes), so the R FEF is responsible for looking at the left half of the world (output to both eyes in the form of conjugate gaze via the PPRF). Therefore a lesion to the R FEF means you have no tonic output to look at the Left half of the world, so both your eyes are deviated right (i.e. the L FEF says "look right!" and no one is there to argue).