When Sam Walks into His Class,he Does Not Have to Think

Multiple Choice

When Sam walks into his class,he does not have to think consciously about how to walk.When he gets there,he pays attention to the lecture even though it is boring and he is tired.In this scenario,the brain structure that is most likely causing these stereotyped patterns of behavior in Sam is the _____.

A) reticular formation
B) substantia nigra
C) hypothalamus
D) amygdala