BIOL 351 Autonomic Nervous System (ANS)

somatic afferent

originate in skeletal muscles, joints, skin

somatic efferent

connect to somatic effector organs

autonomic afferent

originate in viseral receptors

autonomic efferent

connect to viseral effector organs

ganlion/ganglia

collection of nerve cell bodies outside CNS

preganglionic fibers

axons extending from CNS to ganglion

postganglionic fibers

axons connecting ganglion cells with peripheral effectors

sympathetic

fight or flight

parasympathetic

rest and digest

what are the 3 prevertebral collateral ganglions?

celiac, superior mesenteric, inferior mesenteric

preganglionic neuron location:

lateral horn T1-L2

what are 3 ganglionic locations?

- sympathetic chain

- collateral/prevertebral ganglion

- suprarenal medulla

what does the sympathetic chain target?

visceral effectors

- thoracic cavity

- head

- body wall

- limbs

what does the collateral/prevertebral ganglion target?

viseral effectors

- abdominal pelvic cavity

what does the suprarenal medulla target?

horomone release -> NE and EP

- various organs and tissues in the body

what are the 2 preganglionic neurons?

- brain stem (CN Nuclei)

- nuclei @S2-S4

preganglionic fibers (5)

- CN III oculomotor nerve

- CN VII facial nerve

- CN IX glossopharangeal nerve

- CN X vagus nerve

- pelvic nerves

ganglions (4)

- ciliary ganglion

- pterygopalatine submandibular ganglion

- otic ganglion

- intramural ganglion

What does CN III oculomotor nerve target?

intrinsic eye muscles (pupil/lens)

What does CN VII facial nerve target?

nasal, tear, salivary gland

What does CN IX glossopharargeal nerve target?

parotid gland

What does CN X vagus nerve target?

viseral organs of neck, thorax, most of abdomen

What does the pelvic nerve target?

viseral organs of inferior abdomen and pelvic cavity