Autonomic NS Flashcards
What are the main neurons of the ANS classified as and where are their ganglia located and are they mylinated
multipolar
outside brain and spinal cord
preganglionic-unmylinated
postganglionic-mylienated
innervation targets of somatic NS and Autonomic NS
Somatic- efferent voluntary motor n (skeletal striated m)
Autonomic- Involuntary motor n (smooth m, cardiac, glands)
what are the 3 divs of the ANS
Sympathetic
Parasympathetic
Enteric
where are the preganglionic sypathetic neurons found
T1-L3 spinal cord seg (lat horns)
where are the preganglionic parasympathetic neurons found
Cranial outflow (CN3,7,9,10) Sacral outflow s2-4
what innervates the sup, mid and inf cervical sympathetic gangion
axons from t1-3
what innervats l4-co sympathetic ganglion
axons from l1-3
path of sympathetic axons out of spinal cord
start in lat horn exit out ant root and join trunk
exit as white communicating ramus (unmyl) and syapse on ganglai then exit as grey communicating ramus (mylin)
all 3 cervical ganglia send branches to this
cardiac plexus
what ganglia primarly inn the head and neck
cervical sympathetic ganglion
parasympathetic cranial nerves are
CN 3,7,9,10
what ganglia doe the parasympathetic nerves inn
cillary (eyes) pterygopalantine (lacramal) otic (parotid) submandibular (sublingual, submandibular) vagus (many visceral items)
what CNs inn the cillary, pterygopalantine, Otic and Submandibular ganglia
Cillary- CN3
Pterygopalantine- CN7
Otic- CN9
Submandibular- CN7
what is horners syndrome caused by
Blockage of int carotid sym nerve plexus in cavernous sinus ( causes sympathetic to get cut off so parasympathetic takes over )
what does horners syndrome present as
dialation
drooping eyelid
hypersecretion of lacrimal gland