Describe the journey and branches of the vagus nerve (CN X) as it travels through the neck
a) Leaves the brain, becomes vagosympathetic trunk, splits into dorsal and ventral branches, forms dorsal and ventral vagal trunks, passes through the esophageal hiatus into the abdomen
b) Leaves the brain, forms recurrent laryngeal nerve, splits into dorsal and ventral branches, joins to form vagosympathetic trunk, passes through the esophageal hiatus into the abdomen
c) Forms recurrent laryngeal nerve, leaves the brain, splits into dorsal and ventral branches, forms dorsal and ventral vagal trunks, passes through the thoracic inlet into the abdomen
d) Forms vagosympathetic trunk, leaves the brain, splits into dorsal and ventral branches, joins to form recurrent laryngeal nerve, passes through the esophageal hiatus into the abdomen