To be clear, this was a type of hallucination. This was not a bona fide
out-of-body experience the likes of paranormal activity or the astral
projection powers of Shannen Doherty’s character on Charmed.
But it’s still cool because it’s the first attempt to scientifically
analyze and document a non-pathological, self-elicited out-of-body
experience.
Using an fMRI, which images blood flow to detect brain activity,
researchers from the University of Ottawa scanned the brain of a woman
who claims that she can produce, at will, extra-corporeal experiences --
during one of her self-reported experiences. They write in their case study:
She was able to see herself rotating in the air above her body, lying flat, and rolling along with the horizontal plane. She reported sometimes watching herself move from above but remained aware of her unmoving “real” body.
Crazy, yes? But according to the researchers, something was happening in her brain that was consistent with her report. Gizmodo explains:
The fMRI showed a "strong deactivation of the visual cortex" while "activating the left side of several areas associated with kinesthetic imagery," which includes mental imagery of bodily movement. This is the part of the brain that makes it possible for us to interact with the world. It's what makes you feel where your body is in relation to the world.
In other words, the brain scans show that she feels she’s going through
what she’s claiming. But this was no astral trip -- it was a type of
hallucination triggered by some neurological mechanism.
The particulars of the above brain scan, for your neuroscience nomenclature pleasure:
- Activations were mainly left-sided and involved the left
supplementary motor area (F), supramarginal gyrus (D,F), and posterior
superior temporal gyrus. The last two overlap with the temporal parietal
junction that has been associated with out-of-body experiences.
- The cerebellum (B,D,E) also showed activation that is consistent with
the participant’s report of the impression of movement during the
extra-corporeal experiences.
- There was also activity in the left middle and superior orbital
frontal gyri (A,C,D,E) regions often associated with action monitoring.
Clearly, replication is required to say for sure if this pattern is the
same for other people claiming to initiate extra-corporeal experiences.
The researchers speculate that there may be many more unreported
cases.
The findings were published in Frontiers in Human Neuroscience last month.
[Via Gizmodo, Unpopular Science]
Image: A.M. Smith & C. Messier, Front. Hum. Neurosci. 2014