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DIFFERENTIATE CN 3 FROM CN 4 LESION

Neurology

DIFFERENTIATE CN 3 FROM CN 4 LESION

1. Turn the head towards the lesion.
2. The affected eye will intort if CN 4 is intact - the Superior oblique INtorts (SIN) the eye.


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REFERENCES

1. Wilkinson, I. (2017). Oxford handbook of clinical medicine. Oxford: Oxford University Press.
2. Hannaman, R. A., Bullock, L., Hatchell, C. A., & Yoffe, M. (2016). Internal medicine review core curriculum, 2017-2018. CO Springs, CO: MedStudy.
3. Image: no reference available.

Ⓒ A. Manickam 2018

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