The _________ holds images for a fraction of a second

Obsessive-compulsive disorder, if untreated, usually follows a_________course with symptoms__________during periods of stress.

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

As the number of interconnections between neurons increases during early childhood, the ______ of synaptic connections in the brain also swells dramatically

a. spacing c. integration b. density d. lateralization