Brittany was visibly upset that a class she needed... Bookmark Brittany was visibly upset that a class she needed to take was cancelled because of low enrollment. Jim observed that her eyes were dilated. Trace the sympathetic pathway from the lateral gray horn of the spinal cord to the iris of her eye.  1- Identify the spinal cord area (cervical or thoracic) that the preganglionic axons exit in the anterior (ventral) root. 2- Name the sympathetic gagnlia in which the preganglionic and postganglionic neurons synapse.