The deep petrosal nerve carries which type of autonomic fibers?

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Study for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Prepare using flashcards and multiple choice questions. Get ready for your exam with hints and explanations for each question!

Multiple Choice

The deep petrosal nerve carries which type of autonomic fibers?

Explanation:
The deep petrosal nerve contains postganglionic sympathetic fibers that originate from the internal carotid plexus. These fibers travel with the greater petrosal nerve to form the nerve of the pterygoid canal, continuing to reach targets in the nasal and lacrimal regions. In this pathway, the sympathetic fibers remain sympathetic in origin, unlike the parasympathetic fibers carried by the greater petrosal nerve. So, this nerve is a conduit for sympathetic postganglionic input, not parasympathetic, motor, or sensory fibers.

The deep petrosal nerve contains postganglionic sympathetic fibers that originate from the internal carotid plexus. These fibers travel with the greater petrosal nerve to form the nerve of the pterygoid canal, continuing to reach targets in the nasal and lacrimal regions. In this pathway, the sympathetic fibers remain sympathetic in origin, unlike the parasympathetic fibers carried by the greater petrosal nerve. So, this nerve is a conduit for sympathetic postganglionic input, not parasympathetic, motor, or sensory fibers.

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