Lateral aperture

The lateral aperture, lateral aperture of fourth ventricle or foramen of Luschka (after anatomist Hubert von Luschka)^[1] is an opening at the lateral extremity of either lateral recess of the fourth ventricle opening anteriorly^[2] into (sources differ) the pontine cistern^[2]/lateral cerebellomedullary cistern at cerebellopontine angle.^[3] A tuft of choroid plexus commonly extends into the lateral aperture, partially obstructing CSF flow through this aperture.^[4]

Lateral aperture
Animation showing the fourth ventricle (in red). The little points sticking out on the left and right are the two parts of the lateral recess, which end in the foramen of Luschka.
Human caudal brainstem posterior view (Lateral aperture is #18)
Details
Identifiers
Latin	apertura lateralis
Acronym(s)	LA4V
NeuroNames	640
TA98	A14.1.05.718
TA2	5969
FMA	78473
Anatomical terms of neuroanatomy [edit on Wikidata]

The opening of the lateral aperture occurs just lateral to cranial nerve VIII,^[2] and proximally to the flocculus of cerebellum.^[4]