Final answer:
The first three tests to order for a patient presenting with facial paresis, arm drift, and abnormal speech are a CT scan, electromyography (EMG), and magnetic resonance imaging (MRI).
Step-by-step explanation:
The first three tests to order for a patient presenting with facial paresis, arm drift, and abnormal speech would be:
- CT scan to check for any bleeding or structural abnormalities in the brain that may be causing the symptoms
- Electromyography (EMG) to evaluate the electrical activity of the muscles and nerve conduction
- Magnetic Resonance Imaging (MRI) to get a detailed image of the brain and check for any tumors, infections, or other abnormalities