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Nerves of the ANS
Types of motor nerves found in the ANS
| Question | Answer |
|---|---|
| Lateral Horn | has pre-glanglionic cell bodies only from T1 - L2. |
| Ventral Horn | has pre-ganglionic axons to spinal nerves from T1 - L2. Also has somatic motor axons. |
| Spinal Nerve | All carry somatic motor axons, somatic sensory fibers and post-ganglionic sympathetic axons T1 - L2 also have visceral sensory fibers and pregangliotic motor axons. |
| White ramus communicans | Heavily myelinated; connects spinal nerves T1 - L2 (anatomically to the ventral rami) to the sympathetic trunk ganglia. Carries PRE-ganglionic motor axons and visceral sensory fibers. |
| Gray Ramus Communicans | Unmyelinated; connects spinal nerves T1 - L2 to (anatomically to the ventral rami) to the sympathetic trunk ganglia. Carries POST-ganglionic motor axons to the spinal nerve. |
| Sympathetic (Paravertebral) Trunk Ganglion | Contains post-gangliotic cell bodies. |
| Sphlancnic Nerve | Connects sympathetic trunk ganglia with prevertebral ganglia. Carries pre-ganglionic motor axons and visceral sensory fibers. |
| Prevertebral Ganglion | COntains post-ganglionic cell bodies whose axons are distributed to abdominopelvic viscera by coursing in the adventitia of the arteries supplying those viscera. |