The ethnic group that seems most vulnerable to developing PTSD is

The first area to prune and become mature in middle childhood is the

A) occipital lobe. B) parietal lobe. C) hypothalamus. D) amygdala.

Folstein and Rutter studied sets of identical twins in which only one child was autistic. What did they find to be associated with autism of the affected child?

a) inheritance of a recessive trait b) brain injury at or just after birth c) immunological rejection in utero d) infection that passed the placenta