People with a rare type of brain damage have trouble seeing whether something is moving, or if so, how fast and which direction. A study of this condition would probably rely on which method?

In rare cases of brain damage, we find that individuals alarming difficulties. That tasks such as driving a fast can sense the motion of an object motions about us  we will see this type of research when they of dots that move in random directions

Explanation:

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.