A study by Lanius et al. was conducted to cast light upon why many with individuals suffering from posttraumatic stress disorder (PTSD), including those suffering from complex-PTSD, often find it excruciatingly uncomfortable every time the rules of social etiquette compel them to make eye to eye contact with another human being (I, myself once attempted to circumvent this problem by deliberately buying a pair of glasses with lenses that were by far the wrong strength for me so that, whilst, to whomever it was I was required, as the law of social norms decrees, to make eye contact, I appeared to be doing so in the conventionally stipulated manner, in fact, all that my eyes were actually meeting with was a comfortingly, non-threatening blur).
Returning to Lanius’ et al.’s experiment :
The experiment consisted of two groups :
1) Survivors of chronic trauma
2) ‘Normal’ controls
What Did The Experiment Involve?
Participants from both of the above groups were subjected to brain scans whilst a making eye to eye contact with a video character in such a way as to mimic real life face to face contact.
What Were The Results Of The Experiment?
In the case of the ‘normal’ controls (i.e. those who had NOT suffered significant trauma), the simulated eye to eye contact with the video character caused the are of the brain known as the PREFRONTAL CORTEX to become ACTIVATED.
HOWEVER:
In the case of the chronic trauma survivors, the same simulated eye contact with the video character did NOT cause activation of the PREFRONTAL CORTEX. Instead, the scans revealed that, in response to the simulated eye contact, the part of the chronic trauma survivors’ brains that WAS ACTIVATED was a very primitive part (located deep inside the emotional brain) known as the PERIAQUEDUCTAL GRAY.
INTERPRETATION OF THESE RESULTS :
The prefrontal cortex helps us judge and assess a person when we make eye contact, so we can determine whether their intentions seem good or ill.
However, the periaqueductal gray region is associated with SELF-PROTECTIVE RESPONSES such as hypervigilance, submission and cowering.
Therefore, we can infer that those with PTSD / complex PTSD may find it hard to make eye contact because their brains have been adversely affected, as a result of their traumatic experiences, in such a way that, when they make eye contact with another person, the ‘appraisal’ stage of the interaction (normally carried out by the prefrontal cortex) is missed out and, instead, their brains, due to activation of the periqueductal region, cause an intensely fearful response.
This constitutes yet another example of how severe and protracted childhood trauma can damage the physical development of the brain.
Link : Lanius et al’s study.
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David Hosier BSc Hons; MSc; PGDE(FAHE).
