A 67 y/o female is in subacute care after being in a car acc…

A 67 y/o female is in subacute care after being in a car accident. She is reporting difficulty swallowing and is given a feeding tube. When speaking, her voice was hoarse and had a consistently dry mouth. A taste test was performed, and the patient had difficulty sensing taste at the posterior aspect of the tongue.  From which part of the brainstem does the damaged nerve originate?