Autism – Study shows heightened sensitivity to PTSD

For the first time, researchers from the Queensland Brain Institute have proven that mild stress is enough to trigger post-traumatic stress disorder (PTSD) in models of autism.

autism

While recent studies in humans have highlighted the co-occurrence of autism and PTSD, the link between the disorders is often overlooked and remains poorly understood. 

“We set out to determine the occurrence of traumatic stress in ASD, and to understand the neurobiological mechanisms underlying the reported predisposition to PTSD,” said Dr Al Abed. 

Autism and PTSD share common features, including impaired emotional regulation, altered explicit memory, and difficulties with fear conditioning. 

“We demonstrated in four mouse models of autism that a single mild stress can form a traumatic memory.” 

“In a control population, on the other hand, PTSD is triggered by extreme stress.”

“We wanted to understand this unique perception of stress in autism that leads to the formation of PTSD.”

The prefrontal cortex is a highly specialised area in the front part of the brain that plays a crucial role in social cognition and behaviour. 

According to Dr Dehorter, dysfunction in the prefrontal cortex has been linked to both conditions.

“We identified specific cortical circuit alterations that trigger the switch between the formation of a normal memory and a PTSD-like memory during stress,” said Dr Dehorter.

The prefrontal cortex contains specialised cells called interneurons, which are crucial for adapted fear memorisation and normal sensory function and play a key role in stress-related disorders. 

The formation of PTSD-like memories is triggered by over-activation of the prefrontal cortex that is present in autism and throws out the balance of these cortical circuits.

The capabilities of interneurons to respond to stress is altered in autism. This alteration worsens autism traits following the formation of a traumatic memory.  

“We didn’t anticipate that forming a traumatic memory would aggravate the social and behavioural difficulties in autism.”

Autistic Food Habits: Why Autism Complicates Eating

Does autism make eating more complicated for autistic people? Why do many autistics have very specific food preferences? I’m here to tell you all about the atypical eating habits of many autistics, based on lots of research and my own experiences as a late-diagnosed autistic ADHDer. Spoiler: Even though autism looks a bit different for every autistic, and not all autistics will experience food like this, atypical eating habits are statistically shown to be very common among autistics, and today I’ll tell you a little more about why.

Tensions Between Hopes and expectations in Vocational Planning for autistic young adults

With graduation season around the corner, many autistic high school and college seniors may feel a unique tension between their hopes (what is possible) and their expectations (what is probable) regarding their future careers. Autistic youth face so many barriers to employment that one-third of young adults on the autism spectrum are not employed in their twenties. Those who do find employment will likely be in unskilled jobs with low wages, even if they attended college. 

A study reveals common themes among participants’ responses, including the constraints of ableist perspectives among employers, the challenges of “finding the sweet spot” when planning for a future career and the disconnect between autistic youth’s needs and available resources, among others. In light of these findings, the authors advocate for interventions that offer individualized support, embrace neurodiverse identities and facilitate collaborative decision-making. 

“The youth in our study were very practical — trying their best to balance their interests, wanting to make a difference and anticipating difficulties with work-life balance,” said Curtiss, who specializes in special education within UD’s College of Education and Human Development. “There are sometimes erroneous assumptions that autistic youth lack the skills to work, but our study sheds light on the barriers they face.”

Tensions between hopes and expectations 

In their study, Curtiss and her co-authors held focus groups with participants in the Midwestern United States, including autistic young adults between the ages of 16 and 24, caregivers and practitioners. The research team asked participants about their hopes for the youth’s future careers, expectations for their career prospects, roles in their career development, and sources of support and challenges. 

One of the common themes in the participants’ responses was the influence of either disability acceptance or ableism—discrimination against individuals with disabilities—on their hopes and expectations. In recent years, awareness and acceptance of neurodiversity—how some individuals’ brains process information differently—have increased. However, employers are still hesitant to offer meaningful jobs to autistic people. 

“I think that it’s really difficult to find employers that are willing to give neurodiverse adults a chance,” said a parent participant. “If they struggle in some of the social and communication realms, it’s really difficult to get them convinced that this person can do a higher-level job.”

“For this reason and others, some parents in our study struggled with the idea that their hopes for their children’s futures were too high, while others held hopes and expectations that were too low,” Curtiss said. “For example, one parent affirmed their high school senior’s interests in screenwriting but doubted whether a career in television or film was possible.”

Many participants also felt a disconnect between the autistic youth’s needs and available resources. For example, one autistic participant worried about their future as a teacher. 

“I think the main concern I have is being an autistic teacher because there’s so many things about being autistic that make it very difficult to function on a daily basis … there aren’t that many resources out there about any autistic teachers,” the participant said.

Similarly, one parent emphasized that the state vocational rehabilitation (VR) services — which help people with disabilities prepare for, obtain or maintain employment — failed to address the specific needs of their autistic child. 

“It took [the VR program] weeks to find a [support provider],” said one parent participant. “She called out a lot. So, [my son] couldn’t go to work, which — try to explain [that] to a kiddo that has a schedule and a routine. And now all of a sudden, you’re changing it, wait a minute. I was supposed to go to work. So that would set off [distressing] behaviors.”

Despite the parent’s interest in communication and collaboration, the service provider failed to recognize the youth’s needs for routine and schedule. Rather than adopting an individualized approach, the system favored a standardized service approach, undermining positive developmental and vocational outcomes.

Resolving tensions

Curtiss and her co-authors emphasize that resolving these tensions in vocational planning requires a comprehensive and collaborative effort among autistic youth, their parents, practitioners and policymakers. Tailored support for each autistic individual, an acceptance of neurodiverse identities and transparent, collaborative decision-making is crucial. 

“One interesting thing we identified was how important labor markets were to individual opportunities and decision-making,” Curtiss said. “For example, one of the practitioners in our study noted that low unemployment rates tend to help employers be more open to hiring people that they haven’t considered in the past. The importance of these macro-level forces highlights the need for autism advocates at the table when drafting labor policy.”

Why Autistic Unemployment Is So High

The un- and under-employment rate among college-educated autistic adults is around the 80% mark. And no, that zero isn’t a typo – approximately 4 in 5 autistic adults with a college degree is either not working or doing a job far below their education level (ex: janitor with a PhD). The bad news is that the impacts of this reality ripple across our society, negatively affecting everything from the economy to our collective social well-being. The good news is that there are actionable steps that businesses can take to address autistic unemployment and begin to turn the tide towards inclusive, better-for-the-bottom-line employment practices. In this talk, autism self-advocate Claire Barnett presents the current state of autistic unemployment lends a personal perspective on the hiring process, and shares insights that will help any business recruit and employ neurodivergent talent. Claire Barnett is a 2019 cum laude graduate of Vanderbilt’s Peabody School with a Bachelor of Science in Human and Organizational Development. She is now Communications Coordinator at Vanderbilt’s Frist Center for Autism and Innovation.