(Dr. Wooldridge) A 4 week old Arabian colt presents for appa…

(Dr. Wooldridge) A 4 week old Arabian colt presents for apparent blindness (observed running into objects and has superficial wounds on face and side of head).  Neurological exam shows the colt to be nervous and alert, there is NO menace response OU, direct and consensual pupillary light reflexes are normal OU, and the remainder of the cranial nerve examination  is normal. The gait is normal.   Ophthalmic exam shows no abnormalities in the eyes other than lack of menace response.    A few hours after the exam, the colt is observed down and thrashing in his stall with apparent seizure activity and you suspect juvenile  epilepsy.   Where would you localize the lesion?