I am working on a project on Brain Cancer, and I dont understand these...phrases..

1. obstructed flow of cerebrospinal fluid from the third ventricle

2. cerebral hernia

3. hemorraghic stroke

I foung what they do, but I dont understand how they work..Please help!

Hi,
1. obstructed flow of cerebrospinal fluid from the third ventricle: CSF is produced mainly by a structure called the choroid plexus in the lateral, third and fourth ventricles. CSF flows from the lateral ventricle to the third ventricle through the interventricular foramen (also called the foramen of Monro). The third ventricle and fourth ventricle are connected to each other by the cerebral aqueduct (also called the Aqueduct of Sylvius). CSF then flows into the subarachnoid space through the foramina of Luschka (there are two of these) and the foramen of Magendie (only one of these). If there is any obstruction in its flow, may be caused by any defects in vessles, etc, there may be accumulation of CSF. This condition is known as hydrocephalus.
2. Cerebral hernia: protrusion of the brain through an opening in the skull caused by injury or a congenital condition.
3. Hemorrhagic stroke: Bleeding in the brain from a broken or leaking blood vessel causes this type of stroke. A hemorrhagic stroke may be due to an aneurysm—a thin or weak spot in an artery called that balloons out and can burst.

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