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Neurology-physio

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drnieves's version from 2017-06-20 01:16

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Question Answer
Parasympathetic systemPreganglionic neutrons from CN nuclei (3,7, 9, 10) and the sacral spinal cord and release ACh, which binds to postganglionic nicotinic R found within the parasympathetic ganglia in or near the walls of target organs. Postganglionic neutrons also release ACh, activating muscarinic R within the target organs (branch, heart).
Sympathetic systemPreganglionic neurons arise from the thoracolumbar spinal cord and release ACh, which binds to postganglionic N R in the sympathetic chain and prevertebral ganglia. Postganglionic neutrons then release NE, activating a/B R within target organs (including bladder).
Adrenal medullaeRelease NE/epi directly into the circulation after stimulation by sympathetic cholinergic preganglionic neutrons.
Preganglionic and postganglionic sympathetic neutrons that supply eccrine sweat glandsBoth cholinergic.
Communicating hydrocephalusDecrease in CSF absorption by arachnoid granulations. Increase in ICP, papilledema, herniation, arachnoid scarring post meningitis.
Acoustic neuromaType of schwannoma. Located in acoustic meatus (CN 8). If bilateral, ass with NF2.
DepolarizationInflux of Na.
RepolarizationClousure of V gated Na ch and opening of v gated K ch.
K ion permeance highestrepolarization
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