Evaluate the line integral 
where 
is the circle 
oriented in the positive direction.
Definitions:
Electrical Activity
The movement of electrical charges or signals through neurons in the brain or through other electrically active parts of the body, such as the heart.
Ventricles
Hollow organs or cavities in the body; in the context of the heart, they are the two lower chambers responsible for pumping blood.
Fluid-Filled
Containing or encapsulated by a liquid substance; often refers to body parts or systems that hold fluids necessary for functioning.
Brain Areas
Specific regions within the brain that are responsible for various functions, such as emotion, movement, and cognition.
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