A system including two neurostimulation leads can be used for stimulating a select region of a nerve within a nerve bundle. For example, two leads can be used to stimulate a select region of the vagus nerve located within a patient's carotid sheath. The first neurostimulation is positioned within the carotid sheath and the second neurostimulation lead is positioned external to the carotid sheath. Each of the first and second neurostimulation leads includes at least one electrode defining an electrode array about the select region of the nerve. The electrode array, and more particularly, the different possible electrode vector combinations provided by the first and second neurostimulation leads facilitate steering of stimulation current density fields as needed or desired between the electrodes to effectively and efficiently treat a particular medical, psychiatric, or neurological disorder.