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Medical Term:

intervaginal subarachnoid space of optic nerve


Definition: 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 opticiTA, intersheath spaces of optic nerve, Schwalbe spaces