What are watershed areas of the brain?
Watershed infarcts are unique ischemic lesions which are situated along the border zones between the territories of the major cerebral arteries. Altogether, they constitute approximately 10% of all brain infarcts.
What is meant by the triple watershed area?
Triple watershed zone: most vulnerable region where ACA, MCA, and PCA converge in the parieto-occipital region posterior to the lateral ventricles.
What is watershed distribution?
The watershed regions of the brain are located at the farthest end branches of two adjacent vascular territories (areas supplied by arteries). This means that two separate sets of arteries supply blood to the watershed regions.
What are the different watersheds?
The watershed consists of surface water–lakes, streams, reservoirs, and wetlands–and all the underlying groundwater.
Are watershed infarcts bilateral?
Watershed infarcts typically occur following reduced perfusion pressure, often secondary to cardiac events or severe bleeding. In those cases, they are usually bilateral.
What are the three main functions of a watershed?
WATERSHED FUNCTIONS There are three processes within a watershed that can protect water quality if pre- served: water capture, water storage, and water release.
How many types of watersheds are there?
Three types of watershed are distinguished according to size: Small size: < 250 km. Medium size: between 250 km2- 2500 km. Large: >250 km….15.2.2 Small Watersheds.
| Size (ha) | Classification |
|---|---|
| 10,000-50,000 | Sub-watershed |
| 1,000-10,000 | Mili-watershed |
| 100-1,000 | Micro-watershed |
| 10-100 | Mini-watershed |
What is the watershed region of the brain?
Epidemiology. Watershed cerebral infarction accounts for 5-10% of all cerebral infarctions 8.
What are the six regions within the watershed?
– Bulgaria, which uses the област ( oblast) – Russia, which uses the область ( oblast’ ), and for some regions the край ( krai) – Ukraine, which uses the область ( oblast’) – Slovakia ( kraj)
How do human activities affect a watershed?
Insufficient knowledge of impacts in different parts of the world (especially in developing countries),
What are the functional areas of the brain?
Structure Lobes of the cerebral cortex Histology of the cerebral cortex Columnar organization of the cerebral cortex Functional areas of the cerebral cortex Phylogenetic types of cortex Brodmann areas