Though Dr. Amen assures Kim that her brain is generally 'quite beautiful' with no findings that would trigger major fears such as anxiety, depression, or risk of Alzheimer's, he points out in an image showing her frontal lobes that the 'hole-like' shapes on the screen are not physical voids; rather, they represent areas of low brain activity. Specifically, he mentions that the activity in the frontal lobe, which is the center for decision-making, planning, and stress management, is lower than normal.
Upon hearing this, Kim, understandably, freaks out on the show. She refuses to accept it, stating, 'I can't accept this, I have things to take care of this summer.' While she laments about the intensity of her life and the pile-up of work, she is particularly upset about the 'low brain activity' part.
Her doctors assure her that there are no serious findings in her brain indicating a degenerative condition like Alzheimer's and, surprisingly, her levels of anxiety and depression are also quite low. So, the issue is not that her 'brain is collapsing'; it's simply a warning that if her body is to continue carrying this much chaos, serious lifestyle adjustments are needed.