Final answer:
Unilateral vagal denervation typically leads to unilateral vocal cord paralysis due to the loss of function in the laryngeal muscles on the affected side.
Step-by-step explanation:
If there is unilateral denervation of the vagus nerve, which innervates the vocal cords, the likely outcome is unilateral vocal cord paralysis. The vagus nerve is responsible for stimulating muscles in the larynx which control the position and tension of the vocal cords. When only one side (unilateral) is affected, the vocal cord on that side may become paralyzed and unable to move. This would lead to hoarseness or a breathy voice and possible difficulties with swallowing and protecting the airway during swallowing. However, it would not typically cause bilateral vocal cord paralysis since the other side is still innervated properly. Increased vocal cord function or no effect on vocal cords are not typical outcomes of unilateral vagal denervation.