intervaginal subarachnoid space of optic nerve

in·ter·vag·i·nal subarachnoid space of op·tic nerve

[TA]

the spaces within the internal sheath of the optic nerve, between the arachnoidal and pial layers, filled with cerebrospinal fluid and continuous with the subarachnoid space.

Synonym(s): spatium intervaginale subarachnoidale nervi optici [TA], intersheath spaces of optic nerve, Schwalbe spaces

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