| Front | Viscerosensory |
|---|---|
| Back | Structure: one neuron afferent system a) pain neurons - travel via sympathetic pathways b) reflex neurons - travel via parasympathetic pathways Pain pathway: 1. Sensory ending on target organ 2. Visceral plexuses 3. Splanchnic nerves 4. Spinal nerve 5. Dorsal root (DRG) 6. Spinal nerve (dorsal horn) Reflex pathway: 1. Sensory ending on target organ 2. Splanchnic nerves 3. Vagus nerve 4. Sensory ganglion of vagus nerve 5. Brain Function: brings sensory information from organs and target structures 1. Pain from organ walls 2. Physiological receptors for reflex information (chemoreceptors, baroreceptors) |
Tags: pns
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