The celebrity says the images of her brain activity share similarities to someone suffering from PTSD.

Axar.az reports citing Fox news that, US singer and actress Ariana Grande shared images of her brain scan that she says show effects of a post-traumatic stress disorder (PTSD).

In the images she posted, a healthy brain is compared to a PTSD-affected one, with a healthy brain being almost entirely dark and the affected one having numerous illuminated areas. Grande's own brain is seen having numerous highlighted areas as well.

On a recent Instagram Stories update, Ariana Grande showed the results of her PTSD (a mental disorder that develops after a person is exposed to a traumatic event) affected brain compared to a healthy one. pic.twitter.com/6EVmybMP6l

— Ariana Grande Access (@arianaaccesscom) April 11, 2019

"Hilarious and terrifying", she captioned the photo, adding that it is "not a joke".

"Didn't mean to startle anyone with my brain thingy", she wrote in a follow-up post on Instagram. "I love science and seeing the physical reality of what's going on in there was incredible to me. Someday, when I'm more healed up, we can talk more about it".

Grande says she still experiences post-traumatic disorder after a 2017 suicide bombing that killed 22 people in Manchester as the fans were leaving her "Thank U, Next" show.

"I know those families and my fans, and everyone there experienced a tremendous amount of it as well", Grande said in a 2018 interview, referring to the PTSD. "I feel like I shouldn't even be talking about my own experience — like I shouldn't even say anything".

However, some researchers doubt a brain scan is a reliable way of diagnosing this kind of disorder.

"There is no doubt that PTSD changes the way the brain responds to trauma-related and other emotional stimuli", says Charles B. Nemeroff, M.D., Ph.D., Professor of Psychiatry at The University of Texas at Austin, according to CNN report. "However there are not brain imaging tests that are diagnostic of PTSD".