CerebralBloodFlowCerebral circulation refers to the movement of blood through the network of blood vessels supplying the brain.
The amount of blood that the cerebral circulation carries is known as cerebralbloodflow (CBF).
Too little bloodflow (ischemia) results in tissue death.
Cerebralbloodflow is determined by a number of factors, such as viscosity of blood, how dilated blood vessels are, and the net pressure of the flow of blood into the brain, which is determined by the body's blood pressure.
Cerebralblood vessels are able to change the flow of blood through them by altering their diameters.
Cerebral circulation is the movement of blood through the network of blood vessels supplying the brain, providing oxygen and nutrients.
It acts as a cushion or buffer for the cortex, providing a basic mechanical and immunological protection to the brain inside the skull and serves a vital function in cerebral autoregulation of cerebralbloodflow.
CSF is reabsorbed into venous sinus blood via arachnoid granulations.
This decreases total intracranial pressure and facilitates blood perfusion.
CSF as a Diagnostic Tool When CSF pressure is elevated, cerebralbloodflow may be constricted.
When disorders of CSF flow occur, they may therefore affect not only CSF movement but also craniospinal compliance and the intracranial bloodflow, with subsequent neuronal and glial vulnerabilities.
TIAs share the same underlying etiology (cause) as strokes: a disruption of cerebralbloodflow (CBF).
This usually arises from a dislodged atherosclerotic plaque in one of the carotid arteries or from a thrombus (i.e. a blood clot) in the heart because of atrial fibrillation .
Other reasons include excessive narrowing of large vessels resulting from an atherosclerotic plaque and increased blood viscosity caused by some blood diseases.
African Americans generally tend to have a high risk of dying from a stroke, chiefly due to high blood pressure and uncontrolled diabetes.
These include: Avoiding smoking Cutting down on fats and cholesterol to help reduce plaque build up Eating a healthy diet including plenty of fruits and vegetables Limiting sodium in the diet, thereby reducing blood pressure Exercising regularly Moderating alcohol intake Maintaining a normal weight Controlling blood pressure and keeping blood sugars under control The mainstay of treatment following acute recovery from a TIA should be to diagnose and treat the underlying cause.
These processes, which include alterations in cerebralbloodflow and the pressure within the skull, contribute substantially to the damage from the initial injury.
Complications involving the blood vessels include vasospasm, in which vessels constrict and restrict bloodflow, the formation of aneurysms, in which the side of a vessel weakens and balloons out, and stroke.
The risk of post-traumatic seizures increases with severity of trauma and is particularly elevated with certain types of brain trauma such as cerebral contusions or hematomas.
Changes in blood vessels that serve brain tissue reduce nourishment to the brain, resulting in the malfunction and death of brain cells.
By the time we turn 80, cerebralbloodflow is 20% less, and renal bloodflow is 50% less than when we were age 30.
INFARCT DEVELOPMENT High blood pressure (hypertension) causes the left ventricle to work harder.
The ventricle muscle may enlarge and outgrow its blood supply, thus becoming weaker.
Atherosclerosis is the deposition of cholesterol on and in the walls of the arteries, which narrows the lumen, decreases bloodflow, and forms rough surfaces that may cause intravascular clot formation .
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