Velum interpositum: Double layer of pia (tela choroidea), result of folding of brain where hemispheres overgrow diencephalon, forms velum interpositum, which may remain open and communicate posteriorly with quadrigeminal cistern (cavum veli interpositi)
Choroidal fissure: Narrow, pial-lined channel between SAS and ventricles; site of attachment of choroid plexus in lateral ventricles
GROSS ANATOMY
Overview
IMAGING ANATOMY
Overview
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References
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Tables
TERMINOLOGY
Abbreviations
Subarachnoid spaces (SASs)
Definitions
SASs: Cerebrospinal fluid-filled spaces between pia, arachnoid; expand at base of brain, around brainstem, tentorial incisura
Velum interpositum: Double layer of pia (tela choroidea), result of folding of brain where hemispheres overgrow diencephalon, forms velum interpositum, which may remain open and communicate posteriorly with quadrigeminal cistern (cavum veli interpositi)
Choroidal fissure: Narrow, pial-lined channel between SAS and ventricles; site of attachment of choroid plexus in lateral ventricles
GROSS ANATOMY
Overview
IMAGING ANATOMY
Overview
Internal Contents
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