Anatomy & Physiology - Sympathetic Division Pathways

Chapter 14 - Sympathetic division pathways, spinal segment origin, post ganglionic axon pathway from the sympathetic trunk, and the effectors innervated

What is the destination of the spinal nerve?

Integumentary structures of the neck torso and limbs

What is the spinal segment origin of the spinal nerve?

T1 - T2

What is the post ganglionic axon pathway of the spinal nerve?

It travels to all spinal nerves/target organs via gray rami

What are the effectors of the spinal nerve?

Sweat glands, arrector pili muscles, blood vessels in skin of neck, torso, and limbs

What are the destinations of the postganglionic sympathetic nerve?

Integumentary structures of the head, structures of the eye, neck visera, and thoracic visera.

What is the spinal segment origin of the postganglionic sympathetic nerve that is responsible for the head, eye, and neck?

T1 - T2

What is the spinal segment origin of the postganglionic sympathetic nerve that is responsible for the thoracic viscera?

T1 - T5

What is the postganglionic axon pathway of the postganglionic sympathetic nerve that is responsible for the head, eye, and neck?

Via superior cervical ganglion and travel with blood vessels to the head and neck visera

What is the spinal segment origin of the postganglionic sympathetic nerve responsible for the thoracic viscera?

Via cervical and thoracic ganglia to autonomic nerve plexuses near organs

What are the effectors of the postganglionic sympathetic nerve that are responsible for the head, eye, and neck?

Sweat glands, arrector pili muscles, blood vessels in the skin of the head, dilator pupillae muscle of eye, superior tarsal muscle of the eye, and neck viscera

What are the effectors of the postganglionic sympathetic nerve that are responsible for the thoracic viscera?

Esophagus, heart, lungs, and blood vessels within the thoracic cavity

What are the destinations of the splanchnic nerve?

Most abdominal viscera and pelvic viscera

What is the origin of the splanchnic nerve that is responsible for the abdominal viscera?

T5-T12

What is the origin of the splanchnic nerve that is responsible for the pelvic viscera?

T10 - L2

What is the postganglionic axon pathway of the splanchnic nerve that is responsible for the abdominal viscera?

Via thoracic splanchnic nerves to prevertebral ganglia - celiac, superior mesenteric, and inferior mesenteric

What is the postganglionic axon pathway of the splanchnic nerve that is responsible for the pelvic viscera?

Via lumbar and sacral splanchnic nerves to autonomic nerve plexuses that extend to effectors