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Frank, a 72-year-old man, is brought to the hospital by his wife. As he leans on her for support, she explains to the doctor that her husband has suddenly become partially paralyzed and has difficulty speaking. During a neurological exam, the doctor determines that Frank is paralyzed on the right side of his body, but despite this, the doctor is able to elicit a knee-jerk reflex. Frank doesn't voluntarily speak to the doctor, and when questioned, he answers slowly and with great difficulty. His answers, however, are coherent.
Magnetic resonance imaging (MRI) of his brain reveals a blockage of blood flow in the middle cerebral artery. What might explain Frank's symptoms?
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Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...