<prompt> Horners syndrome involves all exceptPtosisExopthalmosAnhidrosisLoss of cilio-spinal reflex  <response>: Horners syndrome is caused by damage to the sympathetic trunk.The symptoms occur on the same side as the lesion of the sympathetic trunk.It is characterized byMiosis a constricted pupil,Ptosis drooping of eyelids due to weakness of superior tarsal muscle which is a part of levator palpebrae superiorisApparent enophthalmos ptosis due to weakness of orbicularis oculi makes it appear that the eyes are sunken in enophtalmos, exophthalmos doesnt occur in Horners syndrome,Anhidrosis decreased sweating andLoss of cilio-spinal reflex pinching nape of neck leads to pupillary dilation. 