Final answer:
Toby is likely training to be a neuroscientist.
Step-by-step explanation:
Toby's specialty in his graduate program is the study of the nervous system. Based on this information, Toby is likely training to be a neuroscientist. Neuroscientists specialize in studying the nervous system, including its structure, function, and development. They use various techniques and methodologies to understand the complex workings of the brain and its impact on behavior and cognitive processes.