History:  A ten year old Paint gelding presented to Animal Imaging for an MRI of the brain. In January of 2009, the horse was treated for a refractory ulcer on the left eye. The ulcer did not respond to treatment. Other symptoms noted included mild unilateral facial sweating, marked unilateral atrophy of the masticatory muscles, decreased palpebral reflex and corneal reflexes, as well as retraction of the eye. |