This Catholic sermon quotes Dr. Gary Lynch, who states that immoral images definitely cause structural brain damage.
The scanning data in the study also found that meditative prayer heals the damaged areas.This sermon is an excellent pep talk for a good Lent.
"Some preachers will keep silence about the truth, and others will trample it underfoot and deny it. Sanctity of life will be held in derision even by those who outwardly profess it, for in those days Our Lord Jesus Christ will send them not a true Pastor but a destroyer." St. Francis of Assisi