Dr. Gallatin is interested in understanding how an injury to the brain impacts behavior. He likely practices
This refers to a psychologist who is responsible for treating patients who have had brain injuries and analyses how this affects their psychology, cognitive and behavioural functions.
With this in mind, we can see that because Dr Gallatin is interested in the understanding how an injury to the brain impacts behavior, then he likely practices neuropsychology.
Read more about neuropsychology here:
https://brainly.com/question/4661749