الفهرس 
Anatomy of cerebrospinal fluid (CSF) spacesOnly 14 pages are availabe for public view
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Abstract
Most of the cerebrospinal fluid (CSF) is formed by the choroids plexus of lateral ventricles. The rate of formation is 0.35- 0.40 ml/min equivalent to 500 ml per day, the rate being same in pediatric and adult population (1). Hydrocephalus is a condition in which excess fluid accumulates in the brain; it is classically defined as dynamic imbalance between the production and absorption of cerebrospinal fluid (CSF), leading to enlarged ventricles (1, 2). The classification being used presently is Non-communicating or obstructive hydrocephalus in which flow of CSF from the ventricles to subarachnoid space is obstructed. Thus there is no communication between the ventricular system and the subarachnoid space. The commonest cause of this category is aqueduct blockage (1). Communicating or non-obstructive hydrocephalus in which flow is not obstructed, but CSF is inadequately reabsorbed in the subarachnoid space. Thus there is communication between the ventricular system and the subarachnoid space. The commonest cause of this group is post-infective and post-haemorrhagic hydrocephalus.