Corticospinal tract lesion

1. Describe a scenario where someone would have a lesion of the corticospinal tract on one side of the spinal cord.  
2. How would the presentation differ if the corticospinal tract on both sides of the spinal cord is affected? In your discussion specify a specific vertebral level and explain what the symptom would look like.  
3. How would reflexes look above the level of the lesion, at the level of the lesion, and below the level of the lesion?
4. How might you be able to determine at what level of the vertebrae, the lesion is located?