Question

Which nerves are being affected by the patient's condition? (select all that apply)

A. CN V1 (ophthalmic)
B. CN VI
C. CN III
D. CN V2 (maxillary)
E. CN V3 (mandibular)

Answer 1

The cranial nerves that contain preganglionic parasympathetic fibers, which are part of the autonomic nervous system, include the oculomotor nerve (CN III), facial nerve (CN VII), glossopharyngeal nerve (CN IX), and vagus nerve (CN X). These nerves are vital for functions such as pupillary constriction and salivation.

Step-by-step explanation:

Cranial Nerves Containing Preganglionic Parasympathetic Fibers

The cranial nerves that contain preganglionic parasympathetic fibers are crucial for various autonomic functions of the body. The oculomotor nerve (CN III) is responsible for initiating pupillary constriction through its connection to the ciliary ganglion. The facial nerve (CN VII) initiates salivation through its fibers to the pterygopalatine and submandibular ganglia. Similarly, the glossopharyngeal nerve (CN IX) also impacts salivation and connects to the otic ganglion, while the vagus nerve (CN X) predominantly targets autonomic ganglia in the thoracic and upper abdominal cavities for regulation of organ function. Thus, the cranial nerves that contain preganglionic parasympathetic fibers and are part of the autonomic nervous system include CN III, CN VII, CN IX, and CN X.