All pelvic viscera receive dual innervation, meaning both sympathetic and parasympathetic contributions (visceral efferent fibers). When thinking about the autonomic innervation of the pelvic viscera, what should instantly spring to mind is the inferior hypogastric plexus. It is here, where all sympathetic and parasympathetic signals converge and are redistributed either directly to target organs within the pelvis or via smaller subsidiary plexuses.
To use an analogy, the inferior hypogastric plexus can be compared in many ways to a main branch post office. A post office is responsible for taking in many types of correspondence from distant locations and redistributing them either directly to their final destinations, or to small branch post offices who then deliver them to their final destinations.
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