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Lateral aperture

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The lateral aperture, lateral aperture of fourth ventricle or foramen of Luschka (after anatomist Hubert von Luschka) is an opening at the lateral extremity of either lateral recess of the fourth ventricle opening anteriorly into (sources differ) the pontine cistern/lateral cerebellomedullary cistern at cerebellopontine angle. A tuft of choroid plexus commonly extends into the lateral aperture, partially obstructing CSF flow through this aperture.