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Samenvatting Klopto 1.2 n. opticus
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Samenvatting met plaatjes van het HC Klopto 1.2 n.opticus gegeven door Sander Beers
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optometrie1995
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Klopto 1.2 Neuro-Opthalmologie (n opticus)12 hersenzenuwen:
6 hersenzenuwen die horen bij de ogen:
- N opticus (II)
- N oculomotorius (nIII)
- N trochlearis (nIV)
- N opthalmicus (nVI)
- N abducens (nVI)
- N VII
N opticus
- begint bij de ganglioncellen in de retina.
- eigenlijk zijn dit hele lange ganglioncel uitlopers.
- Is 5 cm lang
- is omgeven door bot
- de neuronen zijn gemyeliniseerd (in de retina niet)
- hersenvlies en hersenvocht dient als stootkussen om de oogzenuw
- bij een te hoge druk in het hersenvocht is er een stuwingspapil te zien in het netvlies.
(wijst vaak op een ernstige pathologie (hersentumor))
- vaatvoorziening via a. opthalmica (1e tak van …..)
- splitst in 2 delen: a. centralis retinea en a.
2 ziektebeelden vaatvoorziening:
- retina infarct (bloedvoorziening naar de retina staat stil)
- papil infarct (bloedvoorziening naar de papil staat stil)
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