What is indicated by an acute loss of brain function due to decreased blood supply?

An acute loss of brain function due to decreased blood supply is best described by the term cerebrovascular accident (CVA), commonly known as a stroke. This occurs when there is an interruption of blood flow to the brain, leading to rapid loss of brain function, which may manifest as various neurological deficits depending on the area of the brain that is affected.

Cerebral thrombosis refers to the formation of a thrombus within a cerebral vessel, which can lead to a stroke if it causes sufficient blockage. However, it specifically describes the cause of the condition rather than the acute loss of brain function that results from it.

Cerebral contusion refers to a bruise of the brain tissue resulting from trauma, and while it can cause loss of function, it is not primarily due to decreased blood supply.

Encephalitis is an inflammation of the brain, often caused by infection, and does not specifically indicate a decrease in blood supply leading to an acute loss of function.

Therefore, the most accurate term for the condition described is the cerebrovascular accident, which directly points to the acute loss of brain function resulting from interrupted blood supply.