Which of the following is true of brain activities found in posttraumatic stress disorder (ptsd) sufferers? the medial prefrontal cortex tends to be unregulated. the medial prefrontal cortex is more active in the case of severe symptoms of ptsd. the hippocampus may shrink due to overexposure to neurotransmitters and hormones. the amygdala appears to be less responsive to emotional stimuli.

The hippocampus may shrink due to over exposure to neurotransmitter and hormones.

Explanation:

The posttraumatic stress disorder( PTSD) can be defined as the mental condition which is triggered by the terrifying events either by experiencing it or witnessing it.

Symptoms includes: nightmares, flashbacks and some uncontrollable thoughts about the events.

This is caused because of release of excessive hormone and neurotransmitter which tends to shrink the hippo campus of brain.