Answer:
Transient ischemic attack (TIA) may be defined as a medical condition in which individual suffers from numbness, difficulty in speaking and dizziness. The body loss is completely lost for few minutes.
In the given question, Robert might suffers from TIA. In TIA the brain cells of the body feels the anoxia or the cells are completely deprived of the oxygen. This TIA remain last only for few seconds to minutes and might cause the other serious problem.