Final answer:
Headache, blurred vision, weakness on one side of the body, and aphasia are symptoms of a stroke.
Step-by-step explanation:
The symptoms of headache, blurred vision, weakness on one side of the body, and aphasia are indicative of a stroke. A stroke occurs when blood fails to reach a portion of the brain, leading to neuronal death and various symptoms depending on the affected brain area.
Strokes can be caused by blood clots or the rupture of weak blood vessels, and they are a medical emergency. Immediate treatment in the emergency room may involve drugs to dissolve clots and subsequent rehabilitation therapy.
As per the provided information, the symptoms of Michael's condition, including a stiff neck and hemiparesis, could be attributed to a worsening stroke.