09 Brainstem
![](https://photos.thisispiggy.com/file/wikiFiles/BqMqoVl.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/nz1UzLY.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/G9tx2UJ.jpg)
Sections
![](https://photos.thisispiggy.com/file/wikiFiles/9owawBj.jpg)
- top: midbrain
- right: pons
- lower: medulla
Midbrain
![](https://photos.thisispiggy.com/file/wikiFiles/T7sHJKH.jpg)
- MLF: medial longitudinal fascicules: lesion causes lateral gaze (internuclear ophthalmoplegia)
![](https://photos.thisispiggy.com/file/wikiFiles/qVasz4o.jpg)
- red nucleus: fine tuning fine movements
![](https://photos.thisispiggy.com/file/wikiFiles/edKyZ0r.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/KFmPe0T.jpg)
Pons
![](https://photos.thisispiggy.com/file/wikiFiles/GuCp0YA.jpg)
- vestibular: nausea, vomiting, vertigo, nyastagmus
- V: pain and sensation in face
- PPRF, MLF, CN 6 all needed for lateral gaze
![](https://photos.thisispiggy.com/file/wikiFiles/nIXs19i.jpg)
Lateral Pontine Syndrome
![](https://photos.thisispiggy.com/file/wikiFiles/7IYmKRa.jpg)
Medulla
![](https://photos.thisispiggy.com/file/wikiFiles/fHzVQgK.jpg)
- hypothalamospinal: sympathetic nerves
![](https://photos.thisispiggy.com/file/wikiFiles/RgeWTWR.jpg)
Lateral Medullary Syndrome
![](https://photos.thisispiggy.com/file/wikiFiles/TjyYC2q.jpg)
Rule of 4's
![](https://photos.thisispiggy.com/file/wikiFiles/gqY2flr.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/GZPUDvT.jpg)
- 4 CN's in medulla, 4 in pons, 4 above pons
![](https://photos.thisispiggy.com/file/wikiFiles/zSKqQAk.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/kWbe0Kq.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/89rH7rN.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/Qivm3ek.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/R1mgLmU.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/BR4qRwi.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/1uUeboQ.jpg)
- big cranial nerve, stretches from pons to medulla
- CN 8: only use hearing loss to localize to pons, not vestibular signs
Cases
![](https://photos.thisispiggy.com/file/wikiFiles/6QZ2o2U.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/0jEEHJK.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/RQQ9iVZ.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/tUmZBIF.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/M9lFkRB.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/yxnpE1b.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/NTPEqus.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/7vWZ3H4.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/ASWojri.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/9EfmACJ.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/ZD2Hg3s.jpg)
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