What evidence suggests that having a smaller than average hippocampus increases the risk of PTSD?

a. Soldiers with PTSD and their twins without PTSD both have a small hippocampus

b. Soldiers with a small hippocampus and twins with a normal hippocampus both had PTSD.
c. After soldiers recovered from PTSD, their hippocampus grew larger.
d. Brain damage that includes the hippocampus generally leads to PTSD.


a

Psychology

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Fill in the blank(s) with the appropriate word(s).

Psychology