What is watershed infarction of the brain?
WATERSHED INFARCTS are ischemic lesions which are situated along the border zones between the territories of two major arteries, for example the anteri- or and middle or the middle and posterior cerebral arteries (fig. 1).
Is watershed infarct a stroke?
Watershed strokes are localized to two primary regions of the brain, and are termed cortical watersheds (CWS) and internal watersheds (IWS)….Watershed stroke.
| Brain ischemia | |
|---|---|
| Other names | Watershed infarct |
| T1 MRI of an ischemic stroke in the brain without (left) and with (right) contrast. | |
| Specialty | Neurology |
What is LT MCA infarct?
Middle cerebral artery (MCA) stroke describes the sudden onset of focal neurologic deficit resulting from brain infarction or ischemia in the territory supplied by the MCA. The MCA is by far the largest cerebral artery and is the vessel most commonly affected by cerebrovascular accident.
What is an A1 stroke?
A1 segment is the proximal portion of anterior cerebral artery. Absence of the A1 segment can compromise anterior cerebral collateral blood flow. Few studies have examined the association of an absent A1 segment and ischemic stroke outcome.
What does watershed blood supply mean?
Watershed area is the medical term referring to regions of the body, that receive dual blood supply from the most distal branches of two large arteries, such as the splenic flexure of the large intestine.
Where are watershed areas?
Watershed areas are found in the brain, where areas are perfused by both the anterior and middle cerebral arteries, and in the intestines, where areas are perfused by both the superior and inferior mesenteric arteries (i.e., splenic flexure).
What deficits would be more common after a stroke in the nondominant hemisphere?
Neuropsychiatric sequelae of non-dominant hemisphere stroke are less well known. These sequelae include aprosodias and anxiety. Impairments in facial emotion perception and expression and empathy. Mania, apathy, psychosis, and prosopagnosia.
What are the four different types of strokes?
What Are the Types of Strokes?
- Ischemic Stroke.
- Hemorrhagic Stroke.
- Transient Ischemic Attack (Mini-Stroke)
- Brain Stem Stroke.
- Cryptogenic Stroke (stroke of unknown cause)
Why watershed is important?
We all live in a watershed, and watershed condition is important to everyone and everything that uses and needs water. Healthy watersheds provide critical services, such as clean drinking water, productive fisheries, and outdoor recreation, that support our economies, environment and quality of life.
What is watershed and examples?
It includes not only the waterway itself but also the entire land area that drains to it. For example, the watershed of a lake would include not only the streams entering that lake but also the land area that drains into those streams and eventually the lake.
What is the nondominant hemisphere?
The non-dominant hemisphere is responsible for creativity, including art and imagination. 3 The non-dominant hemisphere is also responsible for integrating spatial information and for controlling a sense of awareness of three-dimensional space.
What signs and symptoms are present during a right MCA MCA stroke?
As described previously, MCA strokes typically present with the symptoms individuals associate most commonly with strokes, such as unilateral weakness and/or numbness, facial droop, and speech deficits ranging from mild dysarthria and mild aphasia to global aphasia.