If a person has normal musculature but has difficulty swallowing, which nerves should be tested for function?
The upper 2/3 of the esophagus contains striated muscle. It is derived from the pharyngeal arches and innervated by the vagus nerve (CN X). The lower 1/3 contains smooth muscleft from splanchnic mesoderm and is innervated by the splanchnic plexus.
All India exam
Hypoglossal and phrenic
Hypoglossal and splanchnic
Glossopharyngeal and vagus
Splanchnic and vagus
Splanchnic and vagus