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Autonomics
WVSOM -- medical neuroanatomy -- autonomic nervous system
| Question | Answer |
|---|---|
| What is the target of autonomics? | smooth/cardiac muscle and glands |
| Describe the autonomic neuron pathway. | 2 neuron pathway. Neuron 1 is preganglionic with soma in CNS and Neuron 2 is post-ganglionic with soma in the autonomic ganglia |
| Describe the myelination of autonomic nerves | preganglionics are lightly myelinated and post ganglionics are unmyelinated |
| What is the preganglionic neurotransmitter for sympathetic nervous system | acetylcholine |
| What is the postganglionic neurotransmitter for the sympathetic nervous system? | norepi |
| Where do sympathetic neurons travel? | intermediate zone of grey matter in cord |
| What is post ganglionic neurotransmitter for parasympathetic? | acetylcholine |
| what is pre ganglionic neurotranmistter for parasympaththetic? | acetylcholine |
| What is the principal structure for organizing center for ANS activity? | hypothalamus |
| How do sympathetics travel from the hypothalamus? | conneccted to autonomic nuclei and gray matter by axons travellign from Medial hypothalamic nuclei thru dorsal longitudinal fasciculus |
| What ganglia does the occulomotor nerve travel to? | ciliary ganglion |
| What do post-ganglionics from the ciliary ganglion effect? | the eye |
| What ganglion does the facial nerve go to? | pterygopalatine and submandibular ganglion |
| What does the submandimbular and pterygopalatine ganglion effect? | submandibular/sublingual salivary glands and lacrimal glands |
| What ganglion does the glossopharyngeal nerve go to? | otic ganglion |
| What does the otic ganglion effect? | parotid salivary gland |
| Where does the preganglionics of the vagus synapse? | walls of target organs |
| What does the vagus nerve effect? | heart, lungs, bronchi, aorta, liver, gall bladder, stomach, small intestine, proximal portions of the large intestine |
| What is the sacral outflow? | s2-s4 segments of the spinal cord |
| What does the sacral outflow effect? | large intestine, urinary bladder and reporductive organs |
| describe the parasympathetic pathway | preganglionic neurons located in cranial nerve nuclei III, VII, IX and X as well as sacral segments. they travel to the target organ where postganglics then finish the path to teh target on very short post ganglionics |
| Describe the path of the sympathetic nerves | IML > white ramus > chain/ganglia via splanchnics > grey ramus > target organ |
| What are the three sympathetic ganglia in teh abdomen? | celiac ganglion, superior mesenteric ganglion and inferior mesenteric ganglion |
| Where are sympathetihc post-ganglionic neurons located? | sympathetic chain, three ganglia in abdomen and adrenal medulla |
Created by:
tjamrose
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