VELUM INTERPOSITUM Meaning and
Definition
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Velum interpositum is a structure found within the brain that serves as a thin layer separating two ventricles, namely the lateral ventricles. It is classified as a part of the choroid plexus, a network of blood vessels in the brain responsible for producing cerebrospinal fluid (CSF). The velum interpositum is located in the midline of the brain's central region, lying posterior to the fornix and anterior to the pineal gland.
Anatomically, the velum interpositum consists of a double layer of thin tissue, composed of blood vessels and connective tissue. These layers enclose a fluid-filled space known as the velum interpositum space or cavity. This cavity contains CSF, which is continuously produced by the choroid plexus and then circulates around the brain and spinal cord, providing protection and nourishment to the nervous system.
The velum interpositum also plays a role in the flow and absorption of CSF. It contains specialized structures called arachnoid granulations, which act as one-way valves allowing for the drainage of excess CSF from the ventricles back into the bloodstream. This regulation of CSF levels helps maintain its balance and prevent any buildup or abnormalities that may cause hydrocephalus or increased pressure within the brain.
In summary, the velum interpositum is a vital component of the brain that functions as a barrier between the lateral ventricles and aids in the production, circulation, and drainage of cerebrospinal fluid.
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Interposed veil, tela chorioidea ventriculi tertii.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for VELUM INTERPOSITUM
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Etymology of VELUM INTERPOSITUM
The term "velum interpositum" derives from Latin.
- "Velum" means "veil" or "curtain" in Latin.
- "Interpositum" is the past participle of the verb "interponere" which means "to place or put between" in Latin.
Together, "velum interpositum" can be translated as "interposed veil" or "curtain in-between".
In medical terminology, the phrase refers to a thin membrane or layer located within the brain, specifically between the two lateral ventricles.
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