Definition of Midbrain aqueduct
Midbrain aqueduct: A canal that communicates between the third and fourth ventricles in a system of four communicating cavities within the brain that are continuous with the central canal of the spinal cord.
The four ventricles consist of the two lateral ventricles, the third ventricle and the fourth ventricle:
The ventricles are filled with cerebrospinal fluid, which is formed by structures called choroid plexuses located in the walls and roofs of the ventricles.Source: MedTerms™ Medical Dictionary
Last Editorial Review: 6/14/2012
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