In: Anatomy and Physiology
Mrs. Smith was diagnosed with Stage IV breast cancer 15 months
ago. She underwent
chemotherapy for several months before a bilateral mastectomy was
performed. She then
completed six weeks of radiation therapy to the chest wall.
Recently, she has been experiencing
the inability to manipulate the tongue during chewing and
swallowing, as well as difficulty in
speech. Further investigation indicated that the left side of her
tongue appeared to be paralyzed
when asked to protrude her tongue past her lips. An MRI was
performed and revealed a lesion
present at the base of the skull that was affecting this particular
cranial nerve.
question:
5. Based upon your knowledge of the action of the nerve in Case Study 5, describe how proper functioning of this nerve is necessary for vocalization, food manipulation and swallowing.